Abstract The most commonly used structural system in our country for almost all types of building are multi-storey reinforced concrete frames with masonry infills. Therefore it is essential to understand the seismic behaviour of these structures when subjected to lateral forces. Several research works has been done on the masonry infilled reinforced concrete frames in the past decades. Mortar is used as a binder in normal brick construction in order to create continuous structural form and to bind together the individual units in brickwork. In the present study, analysis has been carried out by considering the increase in height of building from five to ten storied by using finite element software ANSYS 14.5. The seismic analysis of multi-storeyed building frames with infill walls and without infill walls are conducted. 3D analysis will give more realistic values of deflection and stresses. Since this type of study is not feasible in terms of analysis time taken, 2D model was adopted for the present study. A three bay two dimensional building frame is considered with the number of stories varying from 5 storied to 10 storied. The loading applied is as per IS 1893 (Part I): 2002. Equivalent diagonal strut method is adopted for modelling infill walls. The results showed that there is considerable decrease in deflection when infills are used in RC frames. Key Words: Deflection , Equivalent diagonal strut method, lateral load, Solid brick infills, Storey drift
It is the presentation based on pre- stressed concrete construction which includes each and every point and scope which may be useful to civil engineering students
It is the presentation based on pre- stressed concrete construction which includes each and every point and scope which may be useful to civil engineering students
CADmantra Technologies Pvt. Ltd. is one of the best Cad training company in northern zone in India . which are provided many types of courses in cad field i.e AUTOCAD,SOLIDWORK,CATIA,CRE-O,Uniraphics-NX, CNC, REVIT, STAAD.Pro. And many courses
Contact: www.cadmantra.com
www.cadmantra.blogspot.com
www.cadmantra.wix.com
Modeling and Design of Bridge Super Structure and Sub StructureAIT Solutions
Workshop under the Capacity Building Programme of the Southern Road Connectivity Project / Expressway Connectivity Improvement Plan Project, March 2016
ANALYSIS OF WIND & EARTHQUAKE LOAD FOR DIFFERENT SHAPES OF HIGH RISE BUILDINGIAEME Publication
Modern tall buildings have efficient structural systems, and utilize high-strength materials, resulting in reduced building height, and thus, become more slender and flexible with low damping. These flexible buildings are very sensitive to wind excitation and earthquake load causing discomfort to the building occupants. Therefore, in order to mitigate such an excitation and to improve the performance of tall buildings against wind loads and earthquake loads, many researches and studies have been performed. Early integration of aerodynamic shaping, wind engineering considerations,
and structural system selections play a major role in the architectural design of a tall building in order to mitigate the building response to the wind excitations.
ANALYSIS AND DESIGN OF HIGH RISE BUILDING BY USING ETABSila vamsi krishna
RESULT OF ANALYSIS:
https://www.slideshare.net/ilavamsikrishna/results-of-etabs-on-high-rise-residential-buildings
ANALYSIS AND DESIGN OF BUILDING BY USING STAAD PRO PPT link :
https://www.slideshare.net/ilavamsikrishna/analysis-and-design-of-mutistoried-residential-building-by-using-staad-pro
FOR FULL REPORT:
vamsiila@gmail.com
Analysis and comparison of High rise building with lateral load resisting sys...DP NITHIN
Emporis standards define a high rise building as “A multi-storey structure between 35-100 meters tall”. When buildings become taller and taller, the effect of lateral load on the structure comes into existence. The lateral action on the structure is majorly induced by the wind and seismic force.
They needs a lateral load resisting system to maintain the structure stable when lateral loads are applied to them.
The different lateral load resisting systems in the high rise building are
Moment Resisting Frame(MRF), Shear wall system, Bracing system
Pushover is a static-nonlinear analysis method where a structure is subjected to gravity loading and a monotonic displacement-controlled lateral load pattern which continuously increases through elastic and inelastic behavior until an ultimate condition is reached. Lateral load may represent the range of base shear induced by earthquake loading, and its configuration may be proportional to the distribution of mass along building height, mode shapes, or another practical means.
The static pushover analysis is becoming a popular tool for seismic performance evaluation of existing and new structures. The expectation is that the pushover analysis will provide adequate information on seismic demands imposed by the design ground motion on the structural system and its components. The purpose of the paper is to summarize the basic concepts on which the pushover analysis can be based, assess the accuracy of pushover predictions, identify conditions under which the pushover will provide adequate information and, perhaps more importantly, identify cases in which the pushover predictions will be inadequate or even misleading.
Seismic evaluation of rc frame with brick masonry infill wallseSAT Journals
Abstract
Infill panels are widely used as partition walls as well as external walls of the building to fill the gap between RC frames. Non-structural member may provide considerable stiffness to the building and hence may improve the performance of the RC building during ground motions. But In most of the cases, the ignorance of this property of masonry in designing of the RC frame may get an unsafe design. There are two methods are used to determine the effect of ground motion. The effect of ground motion on RC frame building has been carried out by considering with and without the stiffness of infill wall. A comparative study is carried out with RC building using Equivalent Lateral Force method and Response Spectrum method. The masonry infill has been modeled as an equivalent diagonal strut element using Hendry formula. Pushover analysis is carried out on bare frame and frame with infill wall. The model has been generated using STAAD Pro and results obtained from the analysis are compared in terms of strength and stiffness with bare frame.
Keywords: Seismic evaluation, Response Spectrum, masonry infill, diagonal strut.
CADmantra Technologies Pvt. Ltd. is one of the best Cad training company in northern zone in India . which are provided many types of courses in cad field i.e AUTOCAD,SOLIDWORK,CATIA,CRE-O,Uniraphics-NX, CNC, REVIT, STAAD.Pro. And many courses
Contact: www.cadmantra.com
www.cadmantra.blogspot.com
www.cadmantra.wix.com
Modeling and Design of Bridge Super Structure and Sub StructureAIT Solutions
Workshop under the Capacity Building Programme of the Southern Road Connectivity Project / Expressway Connectivity Improvement Plan Project, March 2016
ANALYSIS OF WIND & EARTHQUAKE LOAD FOR DIFFERENT SHAPES OF HIGH RISE BUILDINGIAEME Publication
Modern tall buildings have efficient structural systems, and utilize high-strength materials, resulting in reduced building height, and thus, become more slender and flexible with low damping. These flexible buildings are very sensitive to wind excitation and earthquake load causing discomfort to the building occupants. Therefore, in order to mitigate such an excitation and to improve the performance of tall buildings against wind loads and earthquake loads, many researches and studies have been performed. Early integration of aerodynamic shaping, wind engineering considerations,
and structural system selections play a major role in the architectural design of a tall building in order to mitigate the building response to the wind excitations.
ANALYSIS AND DESIGN OF HIGH RISE BUILDING BY USING ETABSila vamsi krishna
RESULT OF ANALYSIS:
https://www.slideshare.net/ilavamsikrishna/results-of-etabs-on-high-rise-residential-buildings
ANALYSIS AND DESIGN OF BUILDING BY USING STAAD PRO PPT link :
https://www.slideshare.net/ilavamsikrishna/analysis-and-design-of-mutistoried-residential-building-by-using-staad-pro
FOR FULL REPORT:
vamsiila@gmail.com
Analysis and comparison of High rise building with lateral load resisting sys...DP NITHIN
Emporis standards define a high rise building as “A multi-storey structure between 35-100 meters tall”. When buildings become taller and taller, the effect of lateral load on the structure comes into existence. The lateral action on the structure is majorly induced by the wind and seismic force.
They needs a lateral load resisting system to maintain the structure stable when lateral loads are applied to them.
The different lateral load resisting systems in the high rise building are
Moment Resisting Frame(MRF), Shear wall system, Bracing system
Pushover is a static-nonlinear analysis method where a structure is subjected to gravity loading and a monotonic displacement-controlled lateral load pattern which continuously increases through elastic and inelastic behavior until an ultimate condition is reached. Lateral load may represent the range of base shear induced by earthquake loading, and its configuration may be proportional to the distribution of mass along building height, mode shapes, or another practical means.
The static pushover analysis is becoming a popular tool for seismic performance evaluation of existing and new structures. The expectation is that the pushover analysis will provide adequate information on seismic demands imposed by the design ground motion on the structural system and its components. The purpose of the paper is to summarize the basic concepts on which the pushover analysis can be based, assess the accuracy of pushover predictions, identify conditions under which the pushover will provide adequate information and, perhaps more importantly, identify cases in which the pushover predictions will be inadequate or even misleading.
Seismic evaluation of rc frame with brick masonry infill wallseSAT Journals
Abstract
Infill panels are widely used as partition walls as well as external walls of the building to fill the gap between RC frames. Non-structural member may provide considerable stiffness to the building and hence may improve the performance of the RC building during ground motions. But In most of the cases, the ignorance of this property of masonry in designing of the RC frame may get an unsafe design. There are two methods are used to determine the effect of ground motion. The effect of ground motion on RC frame building has been carried out by considering with and without the stiffness of infill wall. A comparative study is carried out with RC building using Equivalent Lateral Force method and Response Spectrum method. The masonry infill has been modeled as an equivalent diagonal strut element using Hendry formula. Pushover analysis is carried out on bare frame and frame with infill wall. The model has been generated using STAAD Pro and results obtained from the analysis are compared in terms of strength and stiffness with bare frame.
Keywords: Seismic evaluation, Response Spectrum, masonry infill, diagonal strut.
MODELLING OF AN INFILL WALL FOR THE ANALYSIS OF A BUILDING FRAME SUBJECTED TO...IAEME Publication
In general the analysis of a building frame is carried out with a bare frame but the presence of masonry infill in a framed structure results in high stiffness and influence the distribution of lateral load and also the response of the framed buildings. It can be noted that there is a large variation of mechanical properties of bricks. Masonry, a combination of brick and mortar, behaves in a highly nonlinear manner. The infill panel needs to be modelled in the analysis of a structural frame subjected to lateral load to obtain its true behaviour. In order to model the masonry infill, its properties required. In order to determine the properties of brick masonry compression tests were conducted on masonry infill panels and prisms.
Code approaches to seismic design of masonry infiled rc framesBinay Shrestha
Masonry infill (MI) increases the initial stiffness of reinforced concrete RC frames. Behavior of MI is difficult to predict because of significant variations in material properties and because of failure modes that are brittle in nature.
Evaluation of fnp for rc frame with brick infilleSAT Journals
Abstract The RC multistoryedframe buildings are commonly built with brick masonry as infill walls.Window and entryway openings are unavoidable piece of the infill dividers. The vicinity of openings in infill dividers fundamentally lessens the parallel quality and solidness of RC casings. The fundamental natural period (FNP) of the building with infill panels depend on strength and stiffness of these infill. The strength and stiffness effect of the infill walls are not considered in any of the seismic codes across the world for calculating FNP. An attempt is made in the present paper to evaluate a new empirical formula by method of least squares (MLS), considering the stiffness of the infill walls and number of bays and storeys. The analysis is carried using SAP v14.2 for gravity and seismic loading. Gravity analysis is carried out as per IS 456: 2000 code provisions. Seismic analysis is carried out as per IS 1893 (Part 1): 2002 procedures for multistoryed ordinary moment resisting frame (OMRF) buildings. All the models are constructed in seismic zone IV.The FNP results by MLS are compared with periods obtained from empirical formulae prescribed in seismic codes across the world.The authors conclude that, FNPs obtained by MLS are accurate than the FNPs calculated from the empirical formulae given in seismic codes considered in the paper. KeyWords: Fundamental Natural Period, Infill Frame, Method of Least Square, OMRF, Seismic Code
EXPERIMENTAL MODELING OF IN FILLED RC FRAMES WITH OPENINGIAEME Publication
Reinforced concrete frames are usually infilled with masonry walls but, in most designs, both the shear strength capacity of these walls and the contribution of the infill panel openings on the shear strength of the infilled frame, especially in critical cases of seismic loading are generally ignored. This paper reports the results of an experimental study of the influence of central openings in the infill on the sway stiffness of reinforced concrete plane frames. A series of 1:4 scaled structural models with opening ratios from 0 to 50 percent in steps of 10 percent were designed, constructed and tested in the study to obtain the load - displacement profiles.
Seismic performance of a rc frame with soft storey criteriaeSAT Journals
Abstract
Soft first storey is a typical feature in the modern multi-storey constructions in urban India. Social and functional need to provide parking space at ground level leads seismic vulnerability of such a building. The computer software usage in civil engineering has greatly reduced the complexities of different aspects in the analysis and design of projects. In the present study an attempt has been made to investigate the seismic behaviour of a multi-storey building with soft first storey. When subjected to seismic loads, it was observed that soft storey frames are less resistant when compared to infill frames.
Keywords: Masonry Infill (MI), Soft storey, relative stiffness, Diagonal strut, Base shear, response spectrum analysis, Time history analysis.
Analysis of rc framed structures with central and partial openings in masonry...eSAT Journals
Abstract In Reinforced concrete frames the masonry infill walls are a common practice in countries like India, where the region is prone to seismic activity. In general, the masonry infill walls are treated as nonstructural element in structural analysis and only the contribution of its mass for is considered and it’s structural parameters like strength and stiffness is generally ignored in practice, such an approach may lead to an unsafe design. Infill walls resist lateral loads but because of the openings in the infill wall the resistance may slightly reduce. The IS code provisions do not provide guidelines for the analysis and design of RC frames with infill wall and for different percentage of openings. In this study, an office or residential building outer side central opening or outer side partial openings are used and analysis is carried for Bare Frame model, infill walls without opening, infill walls with outer periphery central opening and infill wall with outer periphery partial opening models. In ETABS software G+14 RC framed building models has been prepared, Equivalent Static Lateral force method, Response spectrum method has been performed for analysis as per IS 1893 : 2002 including p-delta effects. Storey displacement, Storey shear, Storey drift, with soft storey considering the effects of infill wall with central and partial openings are the parameters considered in this study. For modeling, the Equivalent diagonal strut method has been used to find out the width of Strut using FEMA 273 .The results for bare frame, infill wall, and infill wall with central and partial openings are discussed and conclusions are made. Keywords: Equivalent diagonal strut, stiffness, Drift limitation
Performance based seismic evaluation of G+3 RC buildings with openings in inf...AM Publications
The RC frame structures with infill walls are frequently used in multistoreyed buildings in recent past. Window and
door openings are inevitable part of the infill walls. The presence of openings in infill walls considerably reduces the lateral
strength and stiffness of RC frames. In the present study two-dimensional four storeyed reinforced concrete (RC) building
models are considered with different sizes of openings (15%, 25%, and 35%). Bare frame and soft storey buildings are modeled
considering special moment resisting frame (SMRF) for medium soil profile under zone III. Concrete block infill walls are
modelled as pin-jointed single equivalent diagonal strut. Pushover analysis is carried out for both default and user defined
hinge properties as per FEMA 440 guidelines using SAP2000 software. Results of default and user defined hinge properties
are studied by pushover analysis. The results of ductility ratio, safety ratio, global stiffness, and hinge status at performance
point are compared with the models. Authors conclude that as the percentage of openings increases, vulnerability increases in
the infill walls. Earthquake code procedure should be considered during the design of the structure. User defined hinge models
are more successful in capturing the hinging mechanism compared to the default hinge models.
Descriptive study of pushover analysis in rcc structures of rigid jointYousuf Dinar
ABSTRACT: Structures in mega cities, are under serious threat because of faulty and unskilled design and construction of structures. Sometimes structure designers are more concerned in constructing different load resistant members without knowing its necessity and its performance in the structure. Different configuration of construction may also lead to significant variation in capacity of the same structure. Nonlinear static pushover analysis provides a better view on the performance of the structures during seismic events. This comprehensive research evaluates as well as compares the performances of bare, different infill percentage level, different configuration of soft storey and Shear wall consisting building structures with each other and later depending upon the findings, suggests from which level of performance shear wall should be preferred over the infill structure and will eventually help engineers to decide where generally the soft storey could be constructed in the structures. Above all a better of effects of pushover analysis could be summarized from the findings. Masonry walls are represented by equivalent strut according to pushover concerned codes. For different loading conditions, the performances of structures are evaluated with the help of performance point, base shear, top displacement, storey drift and stages of number of hinges form.
Catch the highlights from MWC16 in this quick recap. Learn about everything that happened at Mobile World Congress, including new virtual reality devices, the latest developments in IoT, and much, much more.
Analysis of rc frame with and without masonry infill wall with different stif...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Numerical Optimization of Shoring Towers for Slab Formwork SystemsIJTET Journal
The usage of Shoring Tower for slab formwork is getting increased due to not only because of flexibility in the assemble and
construction over Prop-Supported Slab Formwork but also the capacity to withstand maximum construction working loads. The Shoring Tower is
generally used for the construction of heavy structures like Bridges, Culverts, staging of Retaining walls, etc. However a comprehensive scale down
of the shoring tower design goes well with the large span and increased slab thickness of conventional buildings. This research focuses primarily on
Analysis, Modelling, Design and Adaptability of shoring tower for slab formwork through computer models and optimized. The different models are
made from the combination of diameter of tubes with slab thickness and also with plywood thickness in Solid Works. Periodic analysis is done in
ANSYS for different load combinations with the variations of slab thickness and plywood thickness will gives the optimized results for the slab
formwork systems.
Seismic performance of friction pendulum bearing by considering storey drift ...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Mechanical properties of hybrid fiber reinforced concrete for pavementseSAT Journals
Abstract
The effect of addition of mono fibers and hybrid fibers on the mechanical properties of concrete mixture is studied in the present
investigation. Steel fibers of 1% and polypropylene fibers 0.036% were added individually to the concrete mixture as mono fibers and
then they were added together to form a hybrid fiber reinforced concrete. Mechanical properties such as compressive, split tensile and
flexural strength were determined. The results show that hybrid fibers improve the compressive strength marginally as compared to
mono fibers. Whereas, hybridization improves split tensile strength and flexural strength noticeably.
Keywords:-Hybridization, mono fibers, steel fiber, polypropylene fiber, Improvement in mechanical properties.
Material management in construction – a case studyeSAT Journals
Abstract
The objective of the present study is to understand about all the problems occurring in the company because of improper application
of material management. In construction project operation, often there is a project cost variance in terms of the material, equipments,
manpower, subcontractor, overhead cost, and general condition. Material is the main component in construction projects. Therefore,
if the material management is not properly managed it will create a project cost variance. Project cost can be controlled by taking
corrective actions towards the cost variance. Therefore a methodology is used to diagnose and evaluate the procurement process
involved in material management and launch a continuous improvement was developed and applied. A thorough study was carried
out along with study of cases, surveys and interviews to professionals involved in this area. As a result, a methodology for diagnosis
and improvement was proposed and tested in selected projects. The results obtained show that the main problem of procurement is
related to schedule delays and lack of specified quality for the project. To prevent this situation it is often necessary to dedicate
important resources like money, personnel, time, etc. To monitor and control the process. A great potential for improvement was
detected if state of the art technologies such as, electronic mail, electronic data interchange (EDI), and analysis were applied to the
procurement process. These helped to eliminate the root causes for many types of problems that were detected.
Managing drought short term strategies in semi arid regions a case studyeSAT Journals
Abstract
Drought management needs multidisciplinary action. Interdisciplinary efforts among the experts in various fields of the droughts
prone areas are helpful to achieve tangible and permanent solution for this recurring problem. The Gulbarga district having the total
area around 16, 240 sq.km, and accounts 8.45 per cent of the Karnataka state area. The district has been situated with latitude 17º 19'
60" North and longitude of 76 º 49' 60" east. The district is situated entirely on the Deccan plateau positioned at a height of 300 to
750 m above MSL. Sub-tropical, semi-arid type is one among the drought prone districts of Karnataka State. The drought
management is very important for a district like Gulbarga. In this paper various short term strategies are discussed to mitigate the
drought condition in the district.
Keywords: Drought, South-West monsoon, Semi-Arid, Rainfall, Strategies etc.
Life cycle cost analysis of overlay for an urban road in bangaloreeSAT Journals
Abstract
Pavements are subjected to severe condition of stresses and weathering effects from the day they are constructed and opened to traffic
mainly due to its fatigue behavior and environmental effects. Therefore, pavement rehabilitation is one of the most important
components of entire road systems. This paper highlights the design of concrete pavement with added mono fibers like polypropylene,
steel and hybrid fibres for a widened portion of existing concrete pavement and various overlay alternatives for an existing
bituminous pavement in an urban road in Bangalore. Along with this, Life cycle cost analyses at these sections are done by Net
Present Value (NPV) method to identify the most feasible option. The results show that though the initial cost of construction of
concrete overlay is high, over a period of time it prove to be better than the bituminous overlay considering the whole life cycle cost.
The economic analysis also indicates that, out of the three fibre options, hybrid reinforced concrete would be economical without
compromising the performance of the pavement.
Keywords: - Fatigue, Life cycle cost analysis, Net Present Value method, Overlay, Rehabilitation
Laboratory studies of dense bituminous mixes ii with reclaimed asphalt materialseSAT Journals
Abstract
The issue of growing demand on our nation’s roadways over that past couple of decades, decreasing budgetary funds, and the need to
provide a safe, efficient, and cost effective roadway system has led to a dramatic increase in the need to rehabilitate our existing
pavements and the issue of building sustainable road infrastructure in India. With these emergency of the mentioned needs and this
are today’s burning issue and has become the purpose of the study.
In the present study, the samples of existing bituminous layer materials were collected from NH-48(Devahalli to Hassan) site.The
mixtures were designed by Marshall Method as per Asphalt institute (MS-II) at 20% and 30% Reclaimed Asphalt Pavement (RAP).
RAP material was blended with virgin aggregate such that all specimens tested for the, Dense Bituminous Macadam-II (DBM-II)
gradation as per Ministry of Roads, Transport, and Highways (MoRT&H) and cost analysis were carried out to know the economics.
Laboratory results and analysis showed the use of recycled materials showed significant variability in Marshall Stability, and the
variability increased with the increase in RAP content. The saving can be realized from utilization of recycled materials as per the
methodology, the reduction in the total cost is 19%, 30%, comparing with the virgin mixes.
Keywords: Reclaimed Asphalt Pavement, Marshall Stability, MS-II, Dense Bituminous Macadam-II
Laboratory investigation of expansive soil stabilized with natural inorganic ...eSAT Journals
Abstract
Soil stabilization has proven to be one of the oldest techniques to improve the soil properties. Literature review conducted revealed
that uses of natural inorganic stabilizers are found to be one of the best options for soil stabilization. In this regard an attempt has
been made to evaluate the influence of RBI-81 stabilizer on properties of black cotton soil through laboratory investigations. Black
cotton soil with varying percentages of RBI-81 viz., 0, 0.5, 1, 1.5, 2, and 2.5 percent were studied for moisture density relationships
and strength behaviour of soils. Also the effect of curing period was evaluated as literature review clearly emphasized the strength
gain of soils stabilized with RBI-81 over a period of time. The results obtained shows that the unconfined compressive strength of
specimens treated with RBI-81 increased approximately by 250% for a curing period of 28 days as compared to virgin soil. Further
the CBR value improved approximately by 400%. The studies indicated an increasing trend for soil strength behaviour with
increasing percentage of RBI-81 suggesting its potential applications in soil stabilization.
Influence of reinforcement on the behavior of hollow concrete block masonry p...eSAT Journals
Abstract
Reinforced masonry was developed to exploit the strength potential of masonry and to solve its lack of tensile strength. Experimental
and analytical studies have been carried out to investigate the effect of reinforcement on the behavior of hollow concrete block
masonry prisms under compression and to predict ultimate failure compressive strength. In the numerical program, three dimensional
non-linear finite elements (FE) model based on the micro-modeling approach is developed for both unreinforced and reinforced
masonry prisms using ANSYS (14.5). The proposed FE model uses multi-linear stress-strain relationships to model the non-linear
behavior of hollow concrete block, mortar, and grout. Willam-Warnke’s five parameter failure theory has been adopted to model the
failure of masonry materials. The comparison of the numerical and experimental results indicates that the FE models can successfully
capture the highly nonlinear behavior of the physical specimens and accurately predict their strength and failure mechanisms.
Keywords: Structural masonry, Hollow concrete block prism, grout, Compression failure, Finite element method,
Numerical modeling.
Influence of compaction energy on soil stabilized with chemical stabilizereSAT Journals
Abstract
Increase in traffic along with heavier magnitude of wheel loads cause rapid deterioration in pavements. There is a need to improve
density, strength of soil subgrade and other pavement layers. In this study an attempt is made to improve the properties of locally
available loamy soil using twin approaches viz., i) increasing the compaction of soil and ii) treating the soil with chemical stabilizer.
Laboratory studies are carried out on both untreated and treated soil samples compacted by different compaction efforts. Studies
show that increase in compaction effort results in increase in density of soil. However in soil treated with chemical stabilizer, rate of
increase in density is not significant. The soil treated with chemical stabilizer exhibits improvement in both strength and performance
properties.
Keywords: compaction, density, subgradestabilization, resilient modulus
Geographical information system (gis) for water resources managementeSAT Journals
Abstract
Water resources projects are inherited with overlapping and at times conflicting objectives. These projects are often of varied sizes
ranging from major projects with command areas of millions of hectares to very small projects implemented at the local level. Thus,
in all these projects there is seldom proper coordination which is essential for ensuring collective sustainability.
Integrated watershed development and management is the accepted answer but in turn requires a comprehensive framework that can
enable planning process involving all the stakeholders at different levels and scales is compulsory. Such a unified hydrological
framework is essential to evaluate the cause and effect of all the proposed actions within the drainage basins.
The present paper describes a hydrological framework developed in the form of a Hydrologic Information System (HIS) which is
intended to meet the specific information needs of the various line departments of a typical State connected with water related aspects.
The HIS consist of a hydrologic information database coupled with tools for collating primary and secondary data and tools for
analyzing and visualizing the data and information. The HIS also incorporates hydrological model base for indirect assessment of
various entities of water balance in space and time. The framework would be maintained and updated to reflect fully the most
accurate ground truth data and the infrastructure requirements for planning and management.
Keywords: Hydrological Information System (HIS); WebGIS; Data Model; Web Mapping Services
Forest type mapping of bidar forest division, karnataka using geoinformatics ...eSAT Journals
Abstract
The study demonstrate the potentiality of satellite remote sensing technique for the generation of baseline information on forest types
including tree plantation details in Bidar forest division, Karnataka covering an area of 5814.60Sq.Kms. The Total Area of Bidar
forest division is 5814Sq.Kms analysis of the satellite data in the study area reveals that about 84% of the total area is Covered by
crop land, 1.778% of the area is covered by dry deciduous forest, 1.38 % of mixed plantation, which is very threatening to the
environmental stability of the forest, future plantation site has been mapped. With the use of latest Geo-informatics technology proper
and exact condition of the trees can be observed and necessary precautions can be taken for future plantation works in an appropriate
manner
Keywords:-RS, GIS, GPS, Forest Type, Tree Plantation
Factors influencing compressive strength of geopolymer concreteeSAT Journals
Abstract
To study effects of several factors on the properties of fly ash based geopolymer concrete on the compressive strength and also the
cost comparison with the normal concrete. The test variables were molarities of sodium hydroxide(NaOH) 8M,14M and 16M, ratio of
NaOH to sodium silicate (Na2SiO3) 1, 1.5, 2 and 2.5, alkaline liquid to fly ash ratio 0.35 and 0.40 and replacement of water in
Na2SiO3 solution by 10%, 20% and 30% were used in the present study. The test results indicated that the highest compressive
strength 54 MPa was observed for 16M of NaOH, ratio of NaOH to Na2SiO3 2.5 and alkaline liquid to fly ash ratio of 0.35. Lowest
compressive strength of 27 MPa was observed for 8M of NaOH, ratio of NaOH to Na2SiO3 is 1 and alkaline liquid to fly ash ratio of
0.40. Alkaline liquid to fly ash ratio of 0.35, water replacement of 10% and 30% for 8 and 16 molarity of NaOH and has resulted in
compressive strength of 36 MPa and 20 MPa respectively. Superplasticiser dosage of 2 % by weight of fly ash has given higher
strength in all cases.
Keywords: compressive strength, alkaline liquid, fly ash
Experimental investigation on circular hollow steel columns in filled with li...eSAT Journals
Abstract
Composite Circular hollow Steel tubes with and without GFRP infill for three different grades of Light weight concrete are tested for
ultimate load capacity and axial shortening , under Cyclic loading. Steel tubes are compared for different lengths, cross sections and
thickness. Specimens were tested separately after adopting Taguchi’s L9 (Latin Squares) Orthogonal array in order to save the initial
experimental cost on number of specimens and experimental duration. Analysis was carried out using ANN (Artificial Neural
Network) technique with the assistance of Mini Tab- a statistical soft tool. Comparison for predicted, experimental & ANN output is
obtained from linear regression plots. From this research study, it can be concluded that *Cross sectional area of steel tube has most
significant effect on ultimate load carrying capacity, *as length of steel tube increased- load carrying capacity decreased & *ANN
modeling predicted acceptable results. Thus ANN tool can be utilized for predicting ultimate load carrying capacity for composite
columns.
Keywords: Light weight concrete, GFRP, Artificial Neural Network, Linear Regression, Back propagation, orthogonal
Array, Latin Squares
Experimental behavior of circular hsscfrc filled steel tubular columns under ...eSAT Journals
Abstract
This paper presents an outlook on experimental behavior and a comparison with predicted formula on the behaviour of circular
concentrically loaded self-consolidating fibre reinforced concrete filled steel tube columns (HSSCFRC). Forty-five specimens were
tested. The main parameters varied in the tests are: (1) percentage of fiber (2) tube diameter or width to wall thickness ratio (D/t
from 15 to 25) (3) L/d ratio from 2.97 to 7.04 the results from these predictions were compared with the experimental data. The
experimental results) were also validated in this study.
Keywords: Self-compacting concrete; Concrete-filled steel tube; axial load behavior; Ultimate capacity.
Evaluation of punching shear in flat slabseSAT Journals
Abstract
Flat-slab construction has been widely used in construction today because of many advantages that it offers. The basic philosophy in
the design of flat slab is to consider only gravity forces; this method ignores the effect of punching shear due to unbalanced moments
at the slab column junction which is critical. An attempt has been made to generate generalized design sheets which accounts both
punching shear due to gravity loads and unbalanced moments for cases (a) interior column; (b) edge column (bending perpendicular
to shorter edge); (c) edge column (bending parallel to shorter edge); (d) corner column. These design sheets are prepared as per
codal provisions of IS 456-2000. These design sheets will be helpful in calculating the shear reinforcement to be provided at the
critical section which is ignored in many design offices. Apart from its usefulness in evaluating punching shear and the necessary
shear reinforcement, the design sheets developed will enable the designer to fix the depth of flat slab during the initial phase of the
design.
Keywords: Flat slabs, punching shear, unbalanced moment.
Evaluation of performance of intake tower dam for recent earthquake in indiaeSAT Journals
Abstract
Intake towers are typically tall, hollow, reinforced concrete structures and form entrance to reservoir outlet works. A parametric
study on dynamic behavior of circular cylindrical towers can be carried out to study the effect of depth of submergence, wall thickness
and slenderness ratio, and also effect on tower considering dynamic analysis for time history function of different soil condition and
by Goyal and Chopra accounting interaction effects of added hydrodynamic mass of surrounding and inside water in intake tower of
dam
Key words: Hydrodynamic mass, Depth of submergence, Reservoir, Time history analysis,
Evaluation of operational efficiency of urban road network using travel time ...eSAT Journals
Abstract
Efficiency of the road network system is analyzed by travel time reliability measures. The study overlooks on an important measure of
travel time reliability and prioritizing Tiruchirappalli road network. Traffic volume and travel time were collected using license plate
matching method. Travel time measures were estimated from average travel time and 95th travel time. Effect of non-motorized vehicle
on efficiency of road system was evaluated. Relation between buffer time index and traffic volume was created. Travel time model has
been developed and travel time measure was validated. Then service quality of road sections in network were graded based on
travel time reliability measures.
Keywords: Buffer Time Index (BTI); Average Travel Time (ATT); Travel Time Reliability (TTR); Buffer Time (BT).
Estimation of surface runoff in nallur amanikere watershed using scs cn methodeSAT Journals
Abstract
The development of watershed aims at productive utilization of all the available natural resources in the entire area extending from
ridge line to stream outlet. The per capita availability of land for cultivation has been decreasing over the years. Therefore, water and
the related land resources must be developed, utilized and managed in an integrated and comprehensive manner. Remote sensing and
GIS techniques are being increasingly used for planning, management and development of natural resources. The study area, Nallur
Amanikere watershed geographically lies between 110 38’ and 110 52’ N latitude and 760 30’ and 760 50’ E longitude with an area of
415.68 Sq. km. The thematic layers such as land use/land cover and soil maps were derived from remotely sensed data and overlayed
through ArcGIS software to assign the curve number on polygon wise. The daily rainfall data of six rain gauge stations in and around
the watershed (2001-2011) was used to estimate the daily runoff from the watershed using Soil Conservation Service - Curve Number
(SCS-CN) method. The runoff estimated from the SCS-CN model was then used to know the variation of runoff potential with different
land use/land cover and with different soil conditions.
Keywords: Watershed, Nallur watershed, Surface runoff, Rainfall-Runoff, SCS-CN, Remote Sensing, GIS.
Estimation of morphometric parameters and runoff using rs & gis techniqueseSAT Journals
Abstract
Land and water are the two vital natural resources, the optimal management of these resources with minimum adverse environmental
impact are essential not only for sustainable development but also for human survival. Satellite remote sensing with geographic
information system has a pragmatic approach to map and generate spatial input layers of predicting response behavior and yield of
watershed. Hence, in the present study an attempt has been made to understand the hydrological process of the catchment at the
watershed level by drawing the inferences from moprhometric analysis and runoff. The study area chosen for the present study is
Yagachi catchment situated in Chickamaglur and Hassan district lies geographically at a longitude 75⁰52’08.77”E and
13⁰10’50.77”N latitude. It covers an area of 559.493 Sq.km. Morphometric analysis is carried out to estimate morphometric
parameters at Micro-watershed to understand the hydrological response of the catchment at the Micro-watershed level. Daily runoff
is estimated using USDA SCS curve number model for a period of 10 years from 2001 to 2010. The rainfall runoff relationship of the
study shows there is a positive correlation.
Keywords: morphometric analysis, runoff, remote sensing and GIS, SCS - method
-
Effect of variation of plastic hinge length on the results of non linear anal...eSAT Journals
Abstract The nonlinear Static procedure also well known as pushover analysis is method where in monotonically increasing loads are applied to the structure till the structure is unable to resist any further load. It is a popular tool for seismic performance evaluation of existing and new structures. In literature lot of research has been carried out on conventional pushover analysis and after knowing deficiency efforts have been made to improve it. But actual test results to verify the analytically obtained pushover results are rarely available. It has been found that some amount of variation is always expected to exist in seismic demand prediction of pushover analysis. Initial study is carried out by considering user defined hinge properties and default hinge length. Attempt is being made to assess the variation of pushover analysis results by considering user defined hinge properties and various hinge length formulations available in literature and results compared with experimentally obtained results based on test carried out on a G+2 storied RCC framed structure. For the present study two geometric models viz bare frame and rigid frame model is considered and it is found that the results of pushover analysis are very sensitive to geometric model and hinge length adopted. Keywords: Pushover analysis, Base shear, Displacement, hinge length, moment curvature analysis
Effect of use of recycled materials on indirect tensile strength of asphalt c...eSAT Journals
Abstract
Depletion of natural resources and aggregate quarries for the road construction is a serious problem to procure materials. Hence
recycling or reuse of material is beneficial. On emphasizing development in sustainable construction in the present era, recycling of
asphalt pavements is one of the effective and proven rehabilitation processes. For the laboratory investigations reclaimed asphalt
pavement (RAP) from NH-4 and crumb rubber modified binder (CRMB-55) was used. Foundry waste was used as a replacement to
conventional filler. Laboratory tests were conducted on asphalt concrete mixes with 30, 40, 50, and 60 percent replacement with RAP.
These test results were compared with conventional mixes and asphalt concrete mixes with complete binder extracted RAP
aggregates. Mix design was carried out by Marshall Method. The Marshall Tests indicated highest stability values for asphalt
concrete (AC) mixes with 60% RAP. The optimum binder content (OBC) decreased with increased in RAP in AC mixes. The Indirect
Tensile Strength (ITS) for AC mixes with RAP also was found to be higher when compared to conventional AC mixes at 300C.
Keywords: Reclaimed asphalt pavement, Foundry waste, Recycling, Marshall Stability, Indirect tensile strength.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
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Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
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Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
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Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Effect of infill walls on the seismic performance of the multistoried buildings
1. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 90
EFFECT OF INFILL WALLS ON THE SEISMIC PERFORMANCE OF
THE MULTISTORIED BUILDINGS
Lini M Thomas1
, Kavitha P.E.2
1
(M.Tech Computer Aided Structural Engineering, SNGCE, Ernakulam, Kerala, India)
2
(Assoc. Prof., Department of Civil Engineering, SNGCE, Ernakulam, Kerala, India)
Abstract
The most commonly used structural system in our country for almost all types of building are multi-storey reinforced concrete
frames with masonry infills. Therefore it is essential to understand the seismic behaviour of these structures when subjected to
lateral forces. Several research works has been done on the masonry infilled reinforced concrete frames in the past decades.
Mortar is used as a binder in normal brick construction in order to create continuous structural form and to bind together the
individual units in brickwork. In the present study, analysis has been carried out by considering the increase in height of building
from five to ten storied by using finite element software ANSYS 14.5. The seismic analysis of multi-storeyed building frames with
infill walls and without infill walls are conducted. 3D analysis will give more realistic values of deflection and stresses. Since this
type of study is not feasible in terms of analysis time taken, 2D model was adopted for the present study. A three bay two
dimensional building frame is considered with the number of stories varying from 5 storied to 10 storied. The loading applied is
as per IS 1893 (Part I): 2002. Equivalent diagonal strut method is adopted for modelling infill walls. The results showed that
there is considerable decrease in deflection when infills are used in RC frames.
Key Words: Deflection , Equivalent diagonal strut method, lateral load, Solid brick infills, Storey drift
--------------------------------------------------------------------***---------------------------------------------------------------------
1. INTRODUCTION
Infill wall panels are used in framed building to create
building façade or envelope. Also to subdivide the internal
spaces of the building. Infills in frames reduce the lateral
deflection of the building. The IS code provisions do not
give any guidelines for the analysis of RC frames with infill
wall. The masonry infill panels in buildings generally are
not considered for the design process and may be treated as
non structural or architectural components. But, the presence
of masonry infill panels has a great significant impact on the
seismic response of the RC framed building. The presence
of infill walls reduces lateral deflections and thereby
reducing probability of the collapse.
1.1 Equivalent Diagonal Strut Method
From previously conducted several studies it showed that
Equivalent diagonal strut method can be used for modeling
the brick infill wall to easily represent the effect of inplane
action during lateral load. Infill walls are analytically
replaced by equivalent diagonal struts [3]. Considering
single diagonal strut for modelling infill and it carries only
compression forces. The end points of the strut connected to
the frame is pin jointed to avoid the moment from frame to
infill. In this method the infill wall is idealized as diagonal
strut and the frame is modelled as beam or truss element.
The idealization is based on the assumption that there is no
bond between frame and infill.
The width of the diagonal strut is given as
w = 0.175 (λ'h)-0.4
d'
Where,
Contact length parameter (λ') =
Ei = modulus of elasticity of the infill material
Ef = modulus of elasticity of the frame material
L = beam length between centre lines of the columns
h = column height between centre lines of the beams
h' = height of the infill wall
t = thickness of the infill wall
d' = diagonal length of the strut
θ = angle between the diagonal of infill panel and the
horizontal in radians
Fig -1: Diagonal strut modelling method of the infill panel
2. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 91
2. FINITE ELEMENT ANALYSIS
2.1 Material Properties of the Model
Material properties of Concrete
Type of material – Isotropic
Weight per volume, Density = 25 kN/m3
Compressive strength = 25 N/m2
Modulus of Elasticity = 22000 N/mm2
Poissons ratio = 0.15
Material properties of Solid Brick infill
Type of material – Isotropic
Weight per volume, Density = 20 kN/m3
Compressive strength = 12 N/m2
Modulus of Elasticity = 8280 N/mm2
Poissons ratio = 0.16
2.2 Choosing Element Type
In order to analyse the model, it is required to specify an
adequate element type for mesh generation in ANSYS 14.5.
Here the element used is BEAM 188 for modelling the
beams and columns and LINK 180 for modelling the
diagonal struts.
2.3 Modelling and Meshing of the Model
The RC frames are fully modelled in software using key
points at every corners. The key points are then connected
together by means of straight lines. Following datas are used
in the analysis of the RC framed building models.
Size of beam : 300 x 300 mm
Size of Column : 300 x 300 mm
Spacing between frames : 3500 mm
Height of the storey : 3.5 m
The finite element discretization was done by using line
meshing.
2.4 Applying Boundary Conditions
The frames are fixed at the bottom. All the degrees of
freedom of the displacement are restrained against
movement .
2.5 Applying Loading Conditions
Loading is done as per IS 1893 (Part I): 2002.The total
lateral force or design seismic base shear is calculated by
using expression
VB = Ah W (Clause 7.5.3)
VB = Design seismic base shear as per IS 1893(Part I): 2002
Ah = Design horizontal acceleration spectrum value
The design horizontal seismic coefficient Ah shall be
determined by the following expression (Clause 6.4.2)
Where,
Z, Zone factor = 0.16
I, Importance factor = 1
Sa/g , Average response acceleration coefficient = 2.5
(Clause 6.4.1)
Seismic zone : III
Type of frame : Ordinary RC moment resisting frame
R, Response reduction factor = 3
Design lateral force at ith
floor may be calculated by
(Clause 7.7.1)
Qi = Design lateral force at floor i
Wi = Seismic weight of floor i
hi = Height of floor i measured from base
Fig -2: Ten storied frame by applying loading condition
2.6 Analysis of the Models
For the analysis static non linear analysis is performed on
the models. Nonlinear analysis is the method used for
determining the earthquake response of the structural
systems.
3. RESULTS
In this study, the effect of solid brick infill walls on the
seismic performance of the multistoried buildings are
studied in detail. A comparative study is carried out on 2D
infill framed structures with solid and bare frame as the
height of the building increases. The effects of infills on the
maximum displacement of the frames with medium to high
rise buildings are considered for the analysis. Deflections
are one of the most important parameter to be considered in
the design and analysis of a tall building. Therefore
deflections for Earthquake loads have been studied
according to equivalent strut method for different cases and
comparisons are made. The 6 cases adopted for the
modelling are
1.) 3 bay 10 storied 2D frames with solid and bare frames
2.) 3 bay 9 storied 2D frames with solid and bare frames
3.) 3 bay 8 storied 2D frames with solid and bare frames
4.) 3 bay 7 storied 2D frames with solid and bare frames
5.) 3 bay 6 storied 2D frames with solid and bare frames
6.) 3 bay 5 storied 2D frames with solid and bare frames
The following parameters are discussed like lateral
displacement and Storey drift
3. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 92
3.1 Lateral Displacements
It is the displacements caused by the Lateral Force on each
storey level of the structure. Lateral displacements will be
more on top storeys. Hence after analyzing each buildings,
the results obtained for different models and the
comparisons are presented in tabular form.
3.2 Storey Drift
It is the displacement of one storey level with respect to the
next level above or below. As per IS 1893 (Part 1):2002, the
storey drift shall not exceed 0.004 times the storey height.
The inter storey drift is one of the commonly used damage
parameter. The inter storey drift is defined as
Where,
is the relative displacement between successive
storey and is the storey height
4. COMPARISON OF RESULTS
4.1 Comparison of Maximum Deflection in A 3 Bay
10 Storied Building With And Without Infills
Fig -3: Maximum deflection in ten storied bare frame
Fig -4: Maximum deflection in ten storied frame with infills
Table -1: Comparison of maximum deflection in each
storey
Store
y No.
Maximum
deflection
in bare
frame
Maximum
deflection in
building with
solid brick
infills ( mm)
% decrease in
deflection of
SBIW with
reference to
Bare frame
10 300.816 30.56 29
9 283.1 28.32 33.15
8 261.2 26.19 36.65
7 243.9 24.2 42.10
6 203.1 19.96 36.62
5 172.4 14.32 27.33
4 145.76 11.91 22.51
3 118.1 9.11 19.64
2 95.45 7.32 33.06
1 53.24 5.92 59.29
Table -2: Storey drift in a 10 storied frame
Storey No. Solid brick infill walls
10 6.4 x 10-4
9 6.08 x 10-4
8 5.68 x 10-4
7 1.21 x 10-3
6 1.61 x 10-3
5 6.88 x 10-4
4 8 x 10-4
3 5.11 x 10-4
2 4 x 10-4
1 1.69 x 10-3
3.2 Comparison of Maximum Deflection in A 3 Bay
9 Storied Building With And Without Infills
Fig -5: Maximum deflection in nine storied bare frame
4. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 93
Fig -6: Maximum deflection in nine storied frame with
infills
Table -3: Comparison of maximum deflection in each
storey
Storey
No.
Maximum
deflection
in bare
frame
Maximum
deflection in
building with
solid brick
infills ( mm)
% decrease in
deflection of
SBIW with
reference to
Bare frame
9 275.6 27.96 31.86
8 256.3 24.23 33.15
7 211.4 21.11 28.04
6 167.5 19.61 26.21
5 123.9 15.23 25.08
4 106.3 13.63 32.28
3 76.4 11.32 36.48
2 59.6 8.49 38.39
1 42.6 6.2 61.19
Table -4: Storey drift in a 9 storied frame
Storey No. Solid brick infill walls
9 1.06 x 10-3
8 8.91 x 10-4
7 4.28 x 10-4
6 1.25 x 10-3
5 4.57 x 10-4
4 6.6 x 10-4
3 8.08 x 10-4
2 6.54 x 10-4
1 1.77 x 10-3
3.3 Comparison of Maximum Deflection in A 3 Bay
8 Storied Building With And Without Infills
Fig -7: Maximum deflection in eight storied bare frame
Fig -8: Maximum deflection in eight storied frame with
infills
Table -5: Comparison of maximum deflection in each
storey
Storey
No.
Maximum
deflection in
bare frame
Maximum
deflection in
building with
solid brick
infills ( mm)
% decrease in
deflection of
SBIW with
reference to
Bare frame
8 170.5 23.48 86.22
7 152.5 20.11 86.81
6 114.5 17.32 84.87
5 100.6 14.91 85.17
4 94.5 11.43 87.9
3 83.6 9.19 89
2 63.56 7.63 87.99
1 36.83 5.32 85.5
5. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
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Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 94
Table -6: Storey drift in an 8 storied frame
Storey No. Solid brick infill walls
8 9.62 x 10 -4
7 7.97 x 10-4
6 6.88 x 10-4
5 9.94 x 10-4
4 6.4 x 10-4
3 4.45 x 10-4
2 6.6 x 10-4
1 1.52 x 10-3
3.4 Comparison of Maximum Deflection in A 3 Bay
7 Storied Building With And Without Infills
Fig -9: Maximum deflection in seven storied bare frame
Fig -10: Maximum deflection in seven storied frame with
infills
Table -7: Comparison of maximum deflection in each
storey
Storey
No.
Maximum
deflection
in bare
frame
Maximum
deflection in
building with
solid brick
infills ( mm)
% decrease in
deflection of
SBIW with
reference to
Bare frame
7 191.3 21.27 88.8
6 173.8 18.11 89.5
5 143.6 15 89.5
4 112.6 11.32 89.9
3 98.65 8.01 91.8
2 54.6 5.91 78.3
1 32.1 2.3 92.8
Table -8: Storey drift in a 7 storied frame
Storey No. Solid brick infill walls
7 9.02 x 10-4
6 8.88 x 10-4
5 1.05 x 10-3
4 9.45 x 10-4
3 6 x 10-4
2 1.03 x 10-3
1 6.57 x 10-4
3.5 Comparison of Maximum Deflection in A 3 Bay 6
Storied Building With And Without Infill
Fig -9: Maximum deflection in eight storied bare frame
6. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 95
Fig -10: Maximum deflection in six storied frames with
infills
Table -9: Comparison of maximum deflection in each
storey
Storey No. Maximum
deflection in
bare frame
Maximum
deflection in
building with
solid brick
infills ( mm)
% decrease in
deflection of
SBIW with
reference to
Bare frame
6 139.77 17.27 87.6
5 109.4 13.14 87.98
4 98.3 10.32 89.5
3 71.5 7.34 89.73
2 49.24 5.91 87.99
1 20.33 3.1 84.75
Table -10: Storey drift in a 6 storied frame
Storey No. Solid brick infill walls
6 1.18 x 10-3
5 8.05 x 10-4
4 8.51 x 10-4
3 4.08 x 10-4
2 8.02 x 10-4
1 8.85 x 10-4
3.6 Comparison of Maximum Deflection in A 3 Bay
5 Storied Building With And Without Infills
Fig -11: Maximum deflection in five storied bare frame
Fig -12: Maximum deflection in five storied frame with
infills
Table -11: Comparison of maximum deflection in each
storey
Storey
No.
Maximum
deflection
in bare
frame
Maximum
deflection in
building with
solid brick
infills ( mm)
% decrease in
deflection of
SBIW with
reference to
Bare frame
5 128.32 13.6 89.4
4 94.5 10.01 89.4
3 62.6 8.44 86.51
2 36.7 6.46 82.3
1 14.25 3.04 78.66
7. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 96
Table.12. Storey drift in 5 storied frame
Storey No. Solid brick infill walls
5 1.02 x 10-3
4 4.48 x 10-4
3 5.65 x 10-4
2 9.77 x 10-4
1 8.68 x 10-4
4. CONCLUSIONS
From the seismic analysis following conclusions are drawn
Equivalent diagonal strut method can be adopted for
modelling Brick infill walls.
3D Analysis gives more realistic values of deflection
and stresses. Since this type of study is not feasible in
terms of analysis time taken, we have adopted 2D
model for the present study.
Deflection in case of bare frame is very large, when
compared to solid brick infill conditions.
Effect of number of Storey
As number of Stores increases, there are additional
lateral acting loads added for increased story level. As
a result, the maximum top deflection of the building
increases gradually.
The maximum deflection of each stores are very much
reduced when infill wall panels are used.
5. SCOPE OF FUTURE WORKS
The present study may be regarded as a preliminary work
for an extensive research work on the effect of various
parameters on infilled frames due to lateral loading. The
recommendations are
Instead of solid brick infills other types of infills such
as concrete block can also be considered for such type
of investigation.
This analysis may be performed by considering
1. Effect of number of bays
2. Effect of various spans of bay
3. Effect of various geometrical properties of beams,
columns and infills.
REFERENCES
[1] Cemalettin Dönmez and M. Alper Çankaya “Effect of
Infill Walls on the Drift Behavior of Reinforced Concrete
Frames Subjected to Lateral-Load Reversals”, Journal of
Earthquake Engineering, Volume 17, Issue 5, 2013
[2] Kashif Mahmud, Rashadul Islam and Al-Amin "Study of
the Reinforced Concrete Frame with Brick Masonry Infill
due to lateral loads", International Journal of Civil and
Environmental Engineering, Volume 10, Issue 4, August
2010, Pages 35-40
[3] Polyakov S.V, “Masonry in Framed Buildings”,
Moscow, 1956.
[4] Manju G "Dynamic Analysis of Infills on RC framed
Structures", International Journal of Innovative Research in
Science, Engineering and Technology, Volume 3, Issue 9,
September 2014, Pages 16150- 16157
[5] Matjaž Dolšek and Peter Fajfar “The effect of masonry
infills on the seismic response of a four-storey reinforced
concrete frame ”, Journal of Engineering Structures,
Volume 30, Issue 7, July 2008, Pages 1991–2001.
[6] Castro, P.T Laursen, D.C Jansen, “Performance of
interlocking compressed earth block infill in confined
masonry construction” Journal of Earthquake Engineering,
July 2014, Pgs: 1-13
[7] S. Pujol and D. Fick, “The test of a full-scale three-story
RC structure with masonry infill walls”, Science Direct,
Volume 32, Issue 10, October 2010, Pages 3112–3121
[8] A. Madan, and M. Reinhorn, “ Modeling of masonry
infill panels for structural analysis” Journal of Structural
Engineering,2011, pages:1295-1302