This document analyzes the effect of varying the diameter of longitudinal reinforcement in the beam on the strength, deformation, and ductility of exterior beam-column joints using finite element analysis software ANSYS. Six beam-column joint models were created with beam longitudinal reinforcement diameters of 8mm, 10mm, and 12mm. The results showed that as the diameter increased, the load carrying capacity and cracking load decreased. Ductility also decreased as the diameter increased, with ductility reducing by 12.8% from 8mm to 12mm reinforcement. Deflection at working load and ultimate deformation increased as the diameter increased. In conclusion, the diameter of beam longitudinal reinforcement plays a major role in the behavior and performance of beam-column joints.
Study of Buckling Restrained Braces in Steel Frame BuildingIJERA Editor
Conventional braces have limited deformation ductility capacity, and exhibit unsymmetrical hysteretic cycles, with marked strength deterioration when loaded in compression. To overcome the above mentioned problems, a new type of brace was developed in Japan called as buckling restrained braces, designated as BRB’s. These braces are designed such that buckling is inhibited to occur, exhibiting adequate behavior and symmetrical hysteretic curves under the action of both tensile and compressive cycles, produced by the action of seismic and wind forces. This paper presents experimental results concerning the lateral load carrying capacity of steel frame model by use of buckling restrained brace. This paper also includes the comparative study of lateral load carrying capacity of frame model for bare frame, frame with Conventional brace and frame with buckling restrained brace.
Behavior Of Castellated Composite Beam Subjected To Cyclic Loadsirjes
The purpose of this study is to determine the behavior of beam-column sub-assemblages castella
due to cyclic loading. Knowing these behaviors can if be analyzed the effectiveness of the concrete filler to
reduce the damage and improve capacity of beam castella. Test beam consists of beam castella fabricated from
normal beam (CB), castella beams with concrete filler between the flange (CCB) and normal beam (NB) as a
comparison. Results showed castella beam (CB) has the advantage to increase the flexural capacity and energy
absorption respectively 100.5% and 74.3%. Besides advantages, castella beam has the disadvantage that
lowering partial ductility and full ductility respectively 12.6 % and 18.1%, decrease resistance ratio 29.5 %
and accelerate the degradation rate of stiffness ratio 31.4%. By the concrete filler between the beam flange to
improve the ability of castella beam, then the beam castella have the ability to increase the flexural capacity of
184.78 %, 217.1% increase energy absorption, increase ductility partial and full ductility respectively 27.9 %
and 26 %, increases resistance ratio 52.5 % and slow the rate of degradation of the stiffness ratio 55.1 %..
Study of castellated beam using stiffeners a revieweSAT Journals
Abstract Now-a-days the use of castellated beam has been admired due to its beneficial functions like light in weight, easy to erect, economical and stronger. The castellated beam is manufactured from its parent solid I beam by cutting it in zigzag pattern and again joining it by welding, so that the depth of the beam increases. Hence, due to increase in depth of beam load carrying capacity of the parent I section is increased with same quantity of material. The increase in depth of castellated beam leads to web post buckling and lateral torsional buckling failure when these beams are subjected to loading. There are many other modes of failure like formation of flexure mechanism, lateral torsional buckling, and formation of vierendeel mechanism, rupture of the welded joint in a web post and shear buckling of a web post which needs to be taken care of. Study shows that use of stiffeners in the web portion of beam helps in minimizing these failures. Therefore, a detailed study in respect of number of stiffeners, size of stiffener and there locations in the web portion of castellated beam needs to be carried out. Hence, in the present paper an attempt has been made to review existing literature, concerned with strength of beam using stiffeners. The literature survey indicates that use of stiffeners in web portion of castellated beams helps in increasing the strength and also minimizing the deflection. Researchers have suggested using stiffener along the edges in order to reduce the stress concentration along openings.. Key Words: openings, castellated beam, cellular beam, stiffener, thickness.
Finite Element Modeling On Behaviour Of Reinforced Concrete Beam Column Joint...IJERA Editor
Recent earthquakes have demonstrated that most of the reinforced concrete structures were severely damaged during earthquakes and they need major repair works. Beam column joints, being the lateral and vertical load resisting members in reinforced concrete structures are particularly vulnerable to failures during earthquakes. The existing reinforced concrete beam column joints which are not designed as per code IS13920:1993 must be strengthened since they do not meet the ductility requirements. The Finite element method (FEM) has become a staple for predicting and simulating the physical behaviour of complex engineering systems. The commercial finite element analysis (FEA) programs have gained common acceptance among engineers in industry and researchers. The details of the finite element analysis of beam column joints retrofitted with carbon fibre reinforced polymer sheets (CFRP) carried out using the package ANSYS are presented in this paper. Three exterior reinforced concrete beam column joint specimens were modelled using ANSYS package. The first specimen is the control specimen. This had reinforcement as per code IS 456:2000. The second specimen which is also the control specimen. This had reinforcement as per code IS 13920:1993. The third specimen had reinforcement as per code IS 456:2000 and was retrofitted with carbon fibre reinforced polymer (CFRP) sheets. During the analysis both the ends of column were hinged. Static load was applied at the free end of the cantilever beam up to a controlled load. The performance of the retrofitted beam column joint was compared with the control specimens and the results are presented in this paper.
Study of Buckling Restrained Braces in Steel Frame BuildingIJERA Editor
Conventional braces have limited deformation ductility capacity, and exhibit unsymmetrical hysteretic cycles, with marked strength deterioration when loaded in compression. To overcome the above mentioned problems, a new type of brace was developed in Japan called as buckling restrained braces, designated as BRB’s. These braces are designed such that buckling is inhibited to occur, exhibiting adequate behavior and symmetrical hysteretic curves under the action of both tensile and compressive cycles, produced by the action of seismic and wind forces. This paper presents experimental results concerning the lateral load carrying capacity of steel frame model by use of buckling restrained brace. This paper also includes the comparative study of lateral load carrying capacity of frame model for bare frame, frame with Conventional brace and frame with buckling restrained brace.
Behavior Of Castellated Composite Beam Subjected To Cyclic Loadsirjes
The purpose of this study is to determine the behavior of beam-column sub-assemblages castella
due to cyclic loading. Knowing these behaviors can if be analyzed the effectiveness of the concrete filler to
reduce the damage and improve capacity of beam castella. Test beam consists of beam castella fabricated from
normal beam (CB), castella beams with concrete filler between the flange (CCB) and normal beam (NB) as a
comparison. Results showed castella beam (CB) has the advantage to increase the flexural capacity and energy
absorption respectively 100.5% and 74.3%. Besides advantages, castella beam has the disadvantage that
lowering partial ductility and full ductility respectively 12.6 % and 18.1%, decrease resistance ratio 29.5 %
and accelerate the degradation rate of stiffness ratio 31.4%. By the concrete filler between the beam flange to
improve the ability of castella beam, then the beam castella have the ability to increase the flexural capacity of
184.78 %, 217.1% increase energy absorption, increase ductility partial and full ductility respectively 27.9 %
and 26 %, increases resistance ratio 52.5 % and slow the rate of degradation of the stiffness ratio 55.1 %..
Study of castellated beam using stiffeners a revieweSAT Journals
Abstract Now-a-days the use of castellated beam has been admired due to its beneficial functions like light in weight, easy to erect, economical and stronger. The castellated beam is manufactured from its parent solid I beam by cutting it in zigzag pattern and again joining it by welding, so that the depth of the beam increases. Hence, due to increase in depth of beam load carrying capacity of the parent I section is increased with same quantity of material. The increase in depth of castellated beam leads to web post buckling and lateral torsional buckling failure when these beams are subjected to loading. There are many other modes of failure like formation of flexure mechanism, lateral torsional buckling, and formation of vierendeel mechanism, rupture of the welded joint in a web post and shear buckling of a web post which needs to be taken care of. Study shows that use of stiffeners in the web portion of beam helps in minimizing these failures. Therefore, a detailed study in respect of number of stiffeners, size of stiffener and there locations in the web portion of castellated beam needs to be carried out. Hence, in the present paper an attempt has been made to review existing literature, concerned with strength of beam using stiffeners. The literature survey indicates that use of stiffeners in web portion of castellated beams helps in increasing the strength and also minimizing the deflection. Researchers have suggested using stiffener along the edges in order to reduce the stress concentration along openings.. Key Words: openings, castellated beam, cellular beam, stiffener, thickness.
Finite Element Modeling On Behaviour Of Reinforced Concrete Beam Column Joint...IJERA Editor
Recent earthquakes have demonstrated that most of the reinforced concrete structures were severely damaged during earthquakes and they need major repair works. Beam column joints, being the lateral and vertical load resisting members in reinforced concrete structures are particularly vulnerable to failures during earthquakes. The existing reinforced concrete beam column joints which are not designed as per code IS13920:1993 must be strengthened since they do not meet the ductility requirements. The Finite element method (FEM) has become a staple for predicting and simulating the physical behaviour of complex engineering systems. The commercial finite element analysis (FEA) programs have gained common acceptance among engineers in industry and researchers. The details of the finite element analysis of beam column joints retrofitted with carbon fibre reinforced polymer sheets (CFRP) carried out using the package ANSYS are presented in this paper. Three exterior reinforced concrete beam column joint specimens were modelled using ANSYS package. The first specimen is the control specimen. This had reinforcement as per code IS 456:2000. The second specimen which is also the control specimen. This had reinforcement as per code IS 13920:1993. The third specimen had reinforcement as per code IS 456:2000 and was retrofitted with carbon fibre reinforced polymer (CFRP) sheets. During the analysis both the ends of column were hinged. Static load was applied at the free end of the cantilever beam up to a controlled load. The performance of the retrofitted beam column joint was compared with the control specimens and the results are presented in this paper.
Castellated beam optimization by using Finite Element Analysis: A Review.theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
Numerical modeling on behaviour of reinforced concrete exterior beam column j...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.
Structural Analysis and Design of Castellated Beam in Fixed ActionAM Publications
The depth is the most important parameter which governs the sectional property of the section. For the serviceability moment of inertia plays very important role and moment of inertia of I-section is directly proportional to the third power of the depth. Research on cellular beams with circular web openings is very limited and is less developed than Cellular beams which may be attributed to the fact that cellular beams are more complicated to analyze due to their continuously changing section properties around the cell.
Two different schemes called “ties and longitudinal stiffeners” were proposed for improving the performance of stainless steel square thin walled tubes. An analytical study using finite element models loaded axially has been conducted. Both geometric and material nonlinearities were considered. Those models were verified against the results obtained from previous researches. The analytical study compared between unstiffened, ties stiffened and longitudinally stiffened stainless steel square thin walled tubes. The studied parameters were square thin walled tube width-to-thickness ratio (W/t) and the axial spacing of stiffening along the length. It was observed that the axial load strength can be enhanced by proposed ties stiffening schemes.
Theoretical study for r.c. columns strengthened with gfrp with different main...Ahmed Ebid
DOI: 10.13140/2.1.3631.9041
It becomes a common practice to strength and repair reinforced concrete columns by wrapping them with GFRP sheets. The aim of this research is to develop a formula to describe the relation between the gain of strength of reinforced concrete square columns, their longitudinal reinforcement and number of warped layers of GFRP sheets. The research is based on simulating loading tests of a set of 12 reinforced concrete columns with different reinforcement ratios and different number of warped layers of GFRP sheets using ANSYS software. The outputs of the ANSYS models are verified using experimental tests results carried out by the author in earlier research. The results of the study are used to develop a proposed formula to correlate the axial capacity of the warped square RC column with its reinforcement ratio and the confining stress caused by the sheets. Values from both proposed formula design and formula of Egyptian Code of Practice (ECP) are compared with ANSYS outputs and experimental results. The final conclusion is that gained strength due to confining equals to (confining stress / Fcu)
In a multi-storied building, the beam-column joint is one of the most critical regions. Usually the beam-column joint was considered as rigid frames. Various researchers over the past years indicated that the joint is not rigid. Now it is also stated that instead of the failure in beam and column, failure can also occur in joint hence joint must be considered as a structural member. The Indian standards define a joint as the portion of the column within the depth of the deepest beam that frames into the column. In framed structures the bending moment and shear forces are maximum at the junction area. So, beam column joint is one of the failure zones. Among the beam column joints, the exterior joint is more critical. The exterior beam column joint have been a study for about 30 years since now. Still there are many more to be understood. In the present work a building is designed in STAAD. Pro V8i and an exterior beam column joint is considered. This joint is modelled in NX CAD and imported to ANSYS to analyse it to derive the shear stress and the corresponding deformation. Pramod Verma | Prof. Pratiksha Malviya "Exterior Beam Column Joint: An Assessment" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-2 , February 2019, URL: https://www.ijtsrd.com/papers/ijtsrd21589.pdf
Paper URL: https://www.ijtsrd.com/engineering/civil-engineering/21589/exterior-beam-column-joint-an-assessment/pramod-verma
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal,
Stress Analysis of Automotive Chassis with Various ThicknessesIOSR Journals
Abstract : This paper presents, stress analysis of a ladder type low loader truck chassis structure consisting of
C-beams design for application of 7.5 tonne was performed by using FEM. The commercial finite element
package CATIA version 5 was used for the solution of the problem. To reduce the expenses of the chassis of the
trucks, the chassis structure design should be changed or the thickness should be decreased. Also determination
of the stresses of a truck chassis before manufacturing is important due to the design improvement. In order to
achieve a reduction in the magnitude of stress at critical point of the chassis frame, side member thickness,
cross member thickness and position of cross member from rear end were varied. Numerical results showed that
if the thickness change is not possible, changing the position of cross member may be a good alternative.
Computed results are then compared to analytical calculation, where it is found that the maximum deflection
agrees well with theoretical approximation but varies on the magnitude aspect.
Keywords - Stress analysis, fatigue life prediction and finite element method etc.
Castellated beam optimization by using Finite Element Analysis: A Review.theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
Numerical modeling on behaviour of reinforced concrete exterior beam column j...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.
Structural Analysis and Design of Castellated Beam in Fixed ActionAM Publications
The depth is the most important parameter which governs the sectional property of the section. For the serviceability moment of inertia plays very important role and moment of inertia of I-section is directly proportional to the third power of the depth. Research on cellular beams with circular web openings is very limited and is less developed than Cellular beams which may be attributed to the fact that cellular beams are more complicated to analyze due to their continuously changing section properties around the cell.
Two different schemes called “ties and longitudinal stiffeners” were proposed for improving the performance of stainless steel square thin walled tubes. An analytical study using finite element models loaded axially has been conducted. Both geometric and material nonlinearities were considered. Those models were verified against the results obtained from previous researches. The analytical study compared between unstiffened, ties stiffened and longitudinally stiffened stainless steel square thin walled tubes. The studied parameters were square thin walled tube width-to-thickness ratio (W/t) and the axial spacing of stiffening along the length. It was observed that the axial load strength can be enhanced by proposed ties stiffening schemes.
Theoretical study for r.c. columns strengthened with gfrp with different main...Ahmed Ebid
DOI: 10.13140/2.1.3631.9041
It becomes a common practice to strength and repair reinforced concrete columns by wrapping them with GFRP sheets. The aim of this research is to develop a formula to describe the relation between the gain of strength of reinforced concrete square columns, their longitudinal reinforcement and number of warped layers of GFRP sheets. The research is based on simulating loading tests of a set of 12 reinforced concrete columns with different reinforcement ratios and different number of warped layers of GFRP sheets using ANSYS software. The outputs of the ANSYS models are verified using experimental tests results carried out by the author in earlier research. The results of the study are used to develop a proposed formula to correlate the axial capacity of the warped square RC column with its reinforcement ratio and the confining stress caused by the sheets. Values from both proposed formula design and formula of Egyptian Code of Practice (ECP) are compared with ANSYS outputs and experimental results. The final conclusion is that gained strength due to confining equals to (confining stress / Fcu)
In a multi-storied building, the beam-column joint is one of the most critical regions. Usually the beam-column joint was considered as rigid frames. Various researchers over the past years indicated that the joint is not rigid. Now it is also stated that instead of the failure in beam and column, failure can also occur in joint hence joint must be considered as a structural member. The Indian standards define a joint as the portion of the column within the depth of the deepest beam that frames into the column. In framed structures the bending moment and shear forces are maximum at the junction area. So, beam column joint is one of the failure zones. Among the beam column joints, the exterior joint is more critical. The exterior beam column joint have been a study for about 30 years since now. Still there are many more to be understood. In the present work a building is designed in STAAD. Pro V8i and an exterior beam column joint is considered. This joint is modelled in NX CAD and imported to ANSYS to analyse it to derive the shear stress and the corresponding deformation. Pramod Verma | Prof. Pratiksha Malviya "Exterior Beam Column Joint: An Assessment" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-2 , February 2019, URL: https://www.ijtsrd.com/papers/ijtsrd21589.pdf
Paper URL: https://www.ijtsrd.com/engineering/civil-engineering/21589/exterior-beam-column-joint-an-assessment/pramod-verma
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal,
Stress Analysis of Automotive Chassis with Various ThicknessesIOSR Journals
Abstract : This paper presents, stress analysis of a ladder type low loader truck chassis structure consisting of
C-beams design for application of 7.5 tonne was performed by using FEM. The commercial finite element
package CATIA version 5 was used for the solution of the problem. To reduce the expenses of the chassis of the
trucks, the chassis structure design should be changed or the thickness should be decreased. Also determination
of the stresses of a truck chassis before manufacturing is important due to the design improvement. In order to
achieve a reduction in the magnitude of stress at critical point of the chassis frame, side member thickness,
cross member thickness and position of cross member from rear end were varied. Numerical results showed that
if the thickness change is not possible, changing the position of cross member may be a good alternative.
Computed results are then compared to analytical calculation, where it is found that the maximum deflection
agrees well with theoretical approximation but varies on the magnitude aspect.
Keywords - Stress analysis, fatigue life prediction and finite element method etc.
Repair and Retrofit on Beam and Column Jointsamerald24
A research experiment has been conducted on the structural performance of repaired minor damaged reinforced concrete beam and column Joints using composite known as CFRP (Carbon Fiber Reinforced Polymer) under simulated cyclic 2D loadings to find the practical lamination repair scheme for flexural strengthening, shear strengthening, and joint strengthening.
Advanced Simulations of Hypertrophic Obstructive Cardiomyopathy in Human Hear...Can Ozcan
Surgeons, physicians and biomedical engineers need a model to better understand heart mechanics and develop solutions around it. Such modeling effort needs to incorporate multiphysics and nonlinearity where Ansys can help.
This presentation is a continuation of what has been done last year using simplified conditions. 3D two-way fully coupled fluid-structure interaction with viscoelastic valve motion in human heart left ventricle is resolved using realistic boundary conditions and material properties.
Can holds BS and MS degrees in Mechanical Engineering and currently a PhD candidate in Biomedical Engineering from Bogazici University Istanbul. He has been with Ozen Engineering since 2005, where he has been performing structural and fluid dynamics simulations using Ansys in various fields. Can is using Python heavily to develop solutions around Ansys products.
Structural Optimization Using the New RBF Morph ANSYS ACT ExtensionMarco E. Biancolini
Shape optimization is usually the final step in the design process of machine parts. Mesh morphing allows quick exploration of many shape variations in a short time. This presentation will demonstrate shape modifications using mesh morphing with full automation using ANSYS ACT technology in the ANSYS Workbench environment.
This is a course project report for an Eye End of Knuckle Joint using ANSYS. A step wise procedure of analysis is given in the report along with all the possible results. This report is a part of curriculum of the subject Finite Element Analysis (FEA) of BE Mechanical Engineering final year, University of Mumbai.
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
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
This presentation elucidates the seismic behaviour of beam-column joint and some methods to improve the resistance of beam-column joints to seismic loads to avoid disasters.
Attendees will develop an understanding of the various types of tile, setting methods, system components, design and installation considerations, specialty systems, and quality assurance. Attendees will learn how to use applicable codes and standards to design and specify tile work meeting minimum requirements and best practices. The program will emphasize design and installation requirements for large format tile, including substrate preparation. The program will also look at the new standards for coefficient of friction (COF). There will be a discussion of sustainable attributes of tile. The program will also address the new recommended specification language for installer qualifications appearing in the TCNA Handbook and MasterSpec.
Finite Element analysis of a hybrid RCS beam-column connectionQuang Huy Nguyen
A new type of exterior RCS connection, in which a steel prole totally embedded inside RC
column is directly welded to the steel beam, is recently proposed within European RCFS
project SMARTCOCO. This kind of joint detail is not covered by the existing design
guidelines. Indeed, Eurocodes 2, 3 and 4 give some provisions that can partly be used for
the design of such a joint. There remains however a real lack of knowledge relatively to the
issue of the force transmission from the embedded steel prole to the surrounding concrete
of the column. Questions that can rise when designing such a connection are about the
optimal anchorage length to embed the steel prole or about the design of reinforcements
in the connection zone of the RC column and in the transition zone at each end of the
embedded steel prole. Based on Eurocodes and existing research works in the literature,
a design method is proposed within European RCFS project SMARTCOCO. However,
experimental tests and numerical simulations need to be conducted to valid this method.
This paper deals with nonlinear nite element model for this type of exterior RCS beamcolumn
connection. The material nonlinearities of concrete, steel beam, stud and rebar
are included in the nite element model. Four RCS joints with dierent anchorage lengths
and concrete classes are modeled. The failure modes and loads are analyzed and compared
to the predicted ones of the design model.
For more content from the same event, including a discussion of Customer Profitability Analysis and Big Data tools, please see:
meetup.com/Analytics-and-Data-in-Financial-Services/pages/Big_Data_meet_Customer_Profitability_Analytics/
NONLINEAR FINITE ELEMENT ANALYSIS FOR REINFORCED CONCRETE SLABS UNDER PUNCHIN...IAEME Publication
This paper presents an implementation of a three-dimensional nonlinear finite element model for evaluating the behavior of reinforced concrete slabs under centric load. The concrete was idealized by using eight-nodded solid elements. While flexural reinforcement and the shear were modeled as line elements, a perfected bond between solid elements and line elements was assumed. The nonlinear behavior of concrete in compression is simulated by an elasto-plastic work-hardening model, and in tension a suitable post-cracking model based on tension stiffening and shear retention models are employed. The steel was simulated using an elastic-full plastic model. The validity of the theoretical formulations and the program used was verified through comparison with available experimental data, and the agreement has proven to be good. A parametric study has been also carried out to investigate the influence of the slab thickness on column-slab connection response
Experimental Study of Axially Loaded RC Short Columns Strengthened With Basal...IJERA Editor
This paper presents the results of experimental study related to the strengthening of R C short columns strengthened with BFRP wrap under axial loading. For strengthening of reinforced concrete columns, total fourteen columns were cast and tested up to failure of the columns under axial loading. The columns were bonded with BFRP sheets in single layer and double layers with various configurations. Out of the fourteen columns two columns were control columns and remaining columns were strengthened with BFRP. The experimental results show that the columns strengthened with BFRP show high load carrying capacity and ductility index.
Probabilistic Design Hollow of Airfoil Wing by Using Finite Element MethodIJERA Editor
This study represents simulation of Airfoil composite beam by using Monte Carlomethod. A three dimensional static analysis of large displacement type has been carried out. Finite element analysis of NACA0012 airfoil composite structure has been carried out and uncertainty in bending stress is analyzed. Bending stress was objective function. Chord length , beam length ,elastic modulus in XY,YZ,XZ,shear modulus of epoxy graphite in in XY,YZ,XZ, ply angle and ply thickness of airfoil section, force are varied within effective range and their effect on bending stress has been analyzed. In order to validate the results, one loop of simulation is benchmarked from results in literature. Ultimately, best set of probabilistic design variable is proposed to reduce bending stress under static loading condition.
SEISMIC BEHAVIOR OF STEEL RIGID FRAME WITH IMPERFECT BRACE MEMBERSIAEME Publication
Model of a steel rigid frame made of thin-walled box section with existence of I-section brace member with initial overall and local imperfection adopted to investigate buckling effects on steel structural behavior as it was subjected to earthquake excitation. In order to take into account of the influence of local deflections on structural response, shell elements were employed to model brace member as well as base columns. Cross sections components with relatively high amplitude of
buckling parameters were considered in different case studies to make it susceptible to develop local deflection. Beam elements were also utilized to develop models with the same specification. FEM method applied to conduct nonlinear time history analysis using earthquake record in in-plane and
out-of-plane direction
SHEAR PERFORMANCE OF FIBER REINFORCED SELF COMPACTING CONCRETE DEEP BEAMSIAEME Publication
The self-compacting concrete (SCC) is the newest innovating category of high performance concrete. The shear behavior of Fiber Reinforced Self-Compacted Concrete (FRSCC) deep beams was investigated. The experimental program consisted of twelve simply supported beams tested up to failure under four-point load. The key parameters covered in this investigation were steel fibers ratios (0.0, 0.50, 0.75 & 1.00%) and the effective shear span to depth ratio; a/d that varied from 0.6 to 1.0. Also, the main flexure reinforcement ratio was variable (1.0, 1.60 and 2.20 percent). In addition, vertical and horizontal web reinforcement effect was investigated. The mid-span deflection, cracks, reinforcement and concrete strains of the tested beams were recorded and compared. Test results pointed out that the steel fibers enhanced the cracking load, ultimate capacity, displacement and energy absorption of the tested FRSCC deep beams.
Parametric Study of Square Concrete Filled Steel Tube Columns Subjected To Co...IJERA Editor
The Concrete Filled Steel Tube (CFST) member has many advantages compared with the conventional concrete structural member. This study presents on the behaviour of concrete-filled steel tube (CFST) columns under axial load by changing parameters. The parameters are thickness of steel tube, Grade of concrete and length of column. The study was conducted using ANSYS 13 finite element software. All the columns are 60 X 60 mm in size. The thickness of the tube is taken as 2, 3, 4, 5 and 6 mm for thickness variation. The grades of concrete infill are M25, M30, M40, M50, M60 and M70 used for grade variation. Lengths of columns are taken as 900, 1200, 1500, 1800, 2100, and 2400 mm for length variation. Buckling load is compared with Euro code 4 (1994).
System shear connector jakarta digunakan sebagai aplikasi dalam konstruksi bangunan untuk menghasilkan kekuatan coran beton lebih kuat dan stabil sesuai dengan perhitungan engineering civil. Dalam hal ini ada 2 hal perhitungan kekuatan secara umum yaitu kekuatan kelengketan stud pada batang baja sesudah dilas. Dan yang kedua adalah kekuatan stud bolt yang digunakan.
Similar to Analytical Investigation on External Beam-Column Joint Using ANSYS By Varying The Diameter Of The Longitudinal Reinforcement In Beam (20)
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
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Analytical Investigation on External Beam-Column Joint Using ANSYS By Varying The Diameter Of The Longitudinal Reinforcement In Beam
1. Harish R et al. Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 8, (Part - 1) August 2015, pp.01-05
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Analytical Investigation on External Beam-Column Joint Using
ANSYS By Varying The Diameter Of The Longitudinal
Reinforcement In Beam
Harish R*, Nambiyanna B**, Dr. R Prabhakara***
*(PG Scholar, Department of Civil Engineering, MS Ramaiah Institute of Technology, Bangalore- 54)
**(Assistant Professor, Department of Civil Engineering, MS Ramaiah Institute of Technology, Bangalore- 54)
***(Professor & HOD, Department of Civil Engineering, MS Ramaiah Institute of Technology, Bangalore- 54)
ABSTRACT
The beam-column joint has been a topic of study for over 30 years now and still there are many things that yet to
be completely understood. The joint was considered to be rigid, however researches have shown that failure may
occur at the joint instead of the beam or column. This study was carried out to determine the effect of the
diameter of longitudinal reinforcement of the beam on the strength, deformation and ductility in the beam-
column joint using ANSYS. It was seen that the load carrying capacity and the deformation increases as the
diameter of reinforcement in the beam increases.
Keywords – ANSYS, Beam-column Joint, Diameter of Reinforcement, Finite Element
I. INTRODUCTION
The beam-column joint (BCJ) is one of the most
critical region in a multi-storey building. The beam-
column joint were usually considered as rigid frames.
But over the past 30 years, various researches have
indicated that the joint is not rigid. Also, the failure
may occur at the joint instead of the beam or the
column, hence the joint must also be considered as a
structural element. The Indian Standard defines a
joint as the portion of the column within the depth of
the deepest beam that frames into the column.
Computer simulation offers the potential to
understand the behavior of the RCC beam-column
joint to various loadings. The research presented here
focuses on ANSYS software to investigate the beam-
column joint. The current research aims to study the
effect of the variation of diameter of the longitudinal
reinforcement in the beam in an exterior beam-
column joint.
The literature on the above topic were less
however some of the literature which are very near to
the topic are given below :
Scott et. Al. [1] performed studies by varying the
reinforcement pattern using bent up, bent down and
U-bars. It was observed that the U-bars show highest
load carrying capacity while the bent up and bent
down bars fail due to pull out.
Kang and Mitra [2] proved that the increasing
development length, head thickness, head size and
decreasing joint shear demand gives better beam-
column joint performance.
Murty et al [3] have tested the exterior beam
column joint subject to static cyclic loading by
changing the anchorage detailing of beam
reinforcement and shear reinforcement. It was
reported that the practical joint detailing using
hairpin-type reinforcement is a competitive
alternative to closed ties in the joint region.
II. DETAILS OF SPECIMEN
The six beam-column joints which were
analysed in the CAD lab of Civil Engineering Dept.
research centre at MSRIT were modeled and run
using ANSYS. Each joint was designed as IS 456:
2000 and detailed as per SP34: 1987.
All the six beam-column joints had identical
beam and column sizes. The beams were 160 mm
wide and 230 mm deep and the columns are 230 mm
by 160 mm. The column height was fixed to 1000mm
and the beam length was fixed at 600mm. The clear
cover for the reinforcement was considered as 25
mm. The 28 day cube strength of concrete was taken
as 42.85 N/mm2. The yield stress in steel was
considered to be 500 N/mm2. The details of the
specimen can be seen in fig 1.
(i) 8 mm Longitudinal reinforcement
RESEARCH ARTICLE OPEN ACCESS
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ISSN: 2248-9622, Vol. 5, Issue 8, (Part - 1) August 2015, pp.01-05
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(ii) 10 mm Longitudinal Reinforcement
(iii) 12mm Longitudinal Reinforcement
Fig. 1 : Reinforcement Details of Beam-Column Joint
III. ANALYTICAL MODEL
3.1 Elements for ANSYS
The beam-column joint was modelled in ANSYS
with SOLID 65 and LINK 180 elements. The SOLID
65 was used to model the concrete. The LINK 180
was used to model the reinforcement in the concrete.
The various parameters required in modeling is
shown in table 1.
Table 1: Material Properties and Element types for
ANSYS
Material
Number
Element Type
Material
Properties
1 Link 180
Linear
Isotropic
Ex
2100000
N/mm2
Prxy 0.3
Bilinear Kinematic
Yield Stress 500 N/mm2
Tangent Modulus 10
2
Solid – Concrete
65
Linear Isotropic
Ex - M 30 32729.96
N/mm2
Prxy 0.2
Concrete
Shear Transfer Coeffecients for an
Open Crack
0.3
Shear Transfer Coeffecients for a
Closed Crack
0.7
Uniaxial Cracking Stress 4.58 N/mm2
Uniaxial Crushing Stress 42.85 N/mm2
Typical shear transfer coefficients represent
conditions of the crack face, It has value ranges from
0.0 to 1.0, with 0.0 representing a smooth crack
(complete loss of shear transfer) and 1.0 representing
a rough crack ( no loss of shear transfer). The shear
transfer coefficients for opened and closed cracks are
determined using the work of Kachlakev, et al.
(Kachlakev 2001) as a basis.
3.2 Modeling In ANSYS
The beam-column joint was modeled in ANSYS
using the above material properties and element
types. The column was considered to be fixed and a
constant axial load of 130 kN, which was the
calculated working load, was applied at the top of the
column. The column was fixed at the top and the
bottom. The load at the beam was applied at a
distance of 100 mm from the free end of the
cantilever portion, in incremental proportions. Even
though the load can be applied at the centroid of the
structure, the loads are applied at the respective
points in order to simulate the actual behavior of the
beam-column joint. The models were analysed
applying monotonic load in the downward direction.
The mesh size was fixed at 25mm. A total of 6 beams
were analysed. The variation made for the beam-
column joint were variation of diameter of
longitudinal reinforcement and the shear
reinforcement. The details of the joints are given
below in table 2. Fig 2 represents the ANSYS
models.
Table 2: Details of Reinforcement for the specimen
Specimen
Set
No.
Column
Reinf.
Beam Reinforcement
Longitudinal Shear
BCJ 1 1
4 Nos-
16ɸ
6 Nos - 8ɸ
8mm@
100c/c
BCJ 2 1
4 Nos-
16ɸ
4 Nos – 10 ɸ
8mm@
100c/c
BCJ 3 1
4 Nos-
16ɸ
3 Nos – 12 ɸ
8mm@
100c/c
BCJ 4 2
4 Nos-
16ɸ
6 Nos - 8ɸ
8mm@
150c/c
BCJ 5 2
4 Nos-
16ɸ
4 Nos – 10 ɸ
8mm@
150c/c
BCJ 6 2
4 Nos-
16ɸ
3 Nos – 12 ɸ
8mm@
150c/c
3. Harish R et al. Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 8, (Part - 1) August 2015, pp.01-05
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(i) Meshed Model in ANSYS
(ii) Reinforcement Configuration
Fig 2: ANSYS modelling
IV. RESULTS AND DISCUSSION
4.1 Load Deflection Characteristics
The load deflection characteristics for 6 exterior
beam column joints which were analysed are shown
in figure 3. It was seen that as the diameter of the
longitudinal reinforcement increases, the cracking
load and the ultimate load carrying capacity reduces
as seen in table 3 ( BCJ 1 to BCJ 2 to BCJ 3, BCJ 4
to BCJ 5 to BCJ 6). It was observed that normalizing
of loads are necessary as the area of steel provided is
not constant, the normalized Ultimate load and
Cracking load are shown in table 3. Fig 3, shows the
combined load deflection characteristics of the joints.
From the cracks, in Fig 4., it can be seen that the
failure occurs at the beam and not at the junction.
This implies that the beam-column joint has been
designed as a strong column weak beam and the
plastic hinge is formed in the beam.
Fig 3 : Load Deflection Graph
Table 3: Normalized Loads
Specimen
Set
No
Ultimate Load
(kN)
Cracking Load
(kN)
BCJ 1 1 58.38 9.08
BCJ 2 1 58.12 8.80
BCJ 3 1 54.95 8.22
BCJ 4 2 57.03 9.09
BCJ 5 2 56.95 8.67
BCJ 6 2 52.87 8.14
Fig 4: Cracks in Beam Column Joint
4.2 Ductility Characteristics
Ductility is generally measured in terms of
displacement ductility. It is the maximum
deformation a structure can undergo without
significant loss of initial yielding resistance. It is the
ratio of maximum deformation to the deformation at
yield.
The displacement ductility for the six specimen
are given in table 4 along with the yield deformation
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and ultimate deformation. The plot of ductility vs
reinforcement percentage shows that as the diameter
of reinforcement increases, the ductility reduces. And
as the shear reinforcement spacing is reduced the
ductility reduces. This can be observed in fig. 5. To
determine the yield deformation, bilinear method of
approximation was used as shown in fig 6. It is
observed that ductility of the joint reduces as the
diameter of the longitudinal reinforcement increases.
Table 4 : Ductility of Beam-Column Joints
Specimen
Set
No.
Displacement Disp.
Ductility
(μd)
Yield
(Δy)
Ultimate
(Δu)
BCJ 1 1 3.89 9.71 2.50
BCJ 2 1 4.34 10.45 2.41
BCJ 3 1 3.87 8.45 2.18
BCJ 4 2 3.3 9.62 2.92
BCJ 5 2 3.93 10.52 2.68
BCJ 6 2 3.64 8.21 2.26
Fig 5: Ductility versus Reinforcement
Fig 6: Bilinear Method For Ductility
4.3 Deflection at Working Load
The deflection at working load is shown in table
5.
Specimen Set Pcr (kN)
Deflection
(mm)
BCJ 1 1 9.08 2.22
BCJ 2 1 8.80 2.45
BCJ 3 1 8.22 2.87
BCJ 4 2 9.09 2.37
BCJ 5 2 8.67 2.52
BCJ 6 2 8.14 2.97
V. CONCLUSIONS
The following conclusions are drawn from the
study of the external beam-column joint applying
monotonic load:
(i) The cracking load reduces as the diameter of the
bar increases. For set 1 the reduction from 8mm to
10mm bars was 3% and for 8mm to 12mm was 10%.
Whereas for set 2, for 8mm to 10mm it was 4.76%
reduction and from 8mm to 12mm it was 10.43%.
(ii) The load deflection characteristics show that at
working load, as the diameter increases the deflection
increases.
(iii) The ductility of the joint reduces as the diameter
of the bar increases. For set 1, the ductility reduces
by 3.6% for 8mm to 10mm and there was reduction
by 12.8% from 8mm to 12mm. Also for set 2, the
ductility reduces by 8.21% for 8mm to 10mm and
there was reduction by 29% for 8mm to 12mm. Also
it was seen as the spacing of stirrups decrease the
ductility reduces, comparing BCJ 1 and BCJ 4 there
was an increase in ductility by 14.38%.
(iv) The displacement at working load increases as
the diameter of the reinforcement increases. The
deflection for set 1, increases by 10.36% for 8mm to
10mm bars and increases by 27.28% for 8mm to
12mm. For set 2, it was seen that the deflection
increases by 6.30% for 8mm to 10mm and there was
an increase of 25.32% for 8m to 12mm bars.
(v) The ultimate load carrying capacity also decreases
as the diameter of the bar increases. For set 1 the
reduction of ultimate load for 8mm to 10mm bars
was 3% and for 8mm to 12mm was 10%. Whereas
for set 2, the ultimate load carrying capacity for 8mm
to 10mm it was 4.76% reduction and from 8mm to
12mm it was 10.43%.
Thus, it is concluded that the diameter of the
longitudinal reinforcement in the beam plays a major
role in the behavior of the beam-column joint.
Further research can be carried out by considering
variation of column and beam dimension, varying the
percentage of steel and this will further enhance our
understanding of the beam-column joint.
VI. ACKNOWLEDGEMENT
We sincerely thank management, CE,Principal
and Head of Department of M.S.Ramaiah Institute of
Technology, Bangalore-560054, affiliated to VTU,
Belgaum for the facility provided to conduct the
analytical work and all the technical guidance.
REFERENCES
Design Standard Codes:
[1] BIS (2000). ―IS 456: 2000—Indian Standard
Plain and Reinforced Concrete—Code of
Practice (Fourth Revision)‖, Bureau of
Indian Standards, New Delhi.
5. Harish R et al. Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 8, (Part - 1) August 2015, pp.01-05
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[2] BIS (1987b). ―SP 34: 1987—Handbook on
Concrete Reinforcement and Detailing‖,
Bureau of Indian Standards, New Delhi.
Journal Papers:
[3] Scott, R. H. (1992). The Effects of Detailing
on RC Beam/Column Connection Behavior.
The Structural Engineer. Vol. 70 No. 18 :
318-324.
[4] Thomas H.K.Kang and Mitra N. (2012).
Prediction and performance of Exterior
Beam-Column Connections with the headed
bars subjected to load reversal. Engineering
Structures 41(2012) 209-217.
[5] Murty, C.V.R., Rai, D.C., Bajpai, K.K. and
Jain, S.K. (2003).―Effectiveness of
reinforcement Details in Exterior Reinforced
Concrete Beam-Column Joints for
Earthquake Resistance‖, ACI Structural
Journal, Vol. 100, No. 2, pp. 149–156.
[6] K.R. Bindhu, K.P. Jaya, ―Strength And
Behaviour Of Exterior Beam Column Joints
With Diagonal Cross Bracing Bars‖, Asian
Journal Of Civil Engineering (Building And
Housing) Vol. 11, No. 3 (2010) Pages 397-
410.
[7] Subramanian, N. and Rao, D.S.P. (2003).
―Seismic Design of Joints in RC
Structures—A Review‖, Indian Concrete
Journal, Vol. 77, No. 2, pp. 883–892.
[8] Marzouk, H., Mohamed Emam, and Hilal,
M. S. (1996). Effect of High-Strength
Concrete Columns on the Behavior of Slab-
Column Intersection. ACI Structural
Journal. Vol. 93 No. 5 : 545-554Text Books
[9] Park, R. and Paulay, T. (1975). “Reinforced
Concrete Structures”, John Wiley & Sons,
Inc., New York, U.S.A.
THESES
[10] Laura N Lowes, Niranjan Mitra, Arash
Altoonash (2004),” A Beam Column Joint
Model For Sumulating the Earthquake
Response of RC Frames.” Pacific
Earthquake Engineering Research Report,
University of California, Berkley