This document analyzes the seismic and wind effects on steel silo supporting structures. It compares a braced frame structure to an unbraced frame structure. Dynamic analysis was performed using equivalent static and response spectrum methods for earthquake zone V according to Indian codes. The braced system had a higher fundamental natural period and higher base shear values compared to the unbraced system, indicating it provided greater stiffness. The braced system also had lower lateral displacements, showing it performed better under dynamic loading. Overall, the analysis found the braced system to be more economical and effective at resisting seismic and wind loads compared to the unbraced alternative.
Analysis and Optimum Design for Steel Moment Resisting Frames to Seismic Exci...IJCMESJOURNAL
The essential purpose of this wander is to develop an Interior Penalty Function (IPF) based estimation to multi-storey steel traces for slightest weight of frames. The frames are proposed for contradicting even impact in view of seismic stacking close by gravity forces. Various structural stems are used for restricting seismic (lateral) forces; however steel moment resisting frames (MRFs) are considered for the present work. The framework solidifies codal courses of action of IS 800-2007, as needs be gets the edges with perfect weight for in-plane moments with lateral support of beam element. Strength and buckling criteria are considered as direct goals close by side constraints in formulating optimization problem. A Software program is made that uses an interior penalty function (IPF) for weight minimization of two-dimensional moment restricting steel encompassed structures. The program uses MATLAB, performs one dimensional interest, and structural design in an iterative technique. The design cases have exhibited that the proposed estimation gives a beneficial instrument to the practicing fundamental algorithm. The program is associated with 6 and 9 storey (4 bays) moment resisting frames (MRFs). The program showed its capacity of optimizing the largeness of two medium size frames. To get part obliges in frames an examination technique must be associated. In the present work Equivalent Lateral Force framework (ELF) and material nonlinear time history analysis (NTH) are associated and perfect qualities gained from both the examinations are contemplated.
Design & Analysis of High rise Building With & Without Floating Column Using ...IJSRD
At present buildings with floating column is a typical feature in the modern multistory construction in urban India. There are many projects in which floating columns are adopted, especially above the ground floor, where transfer girders are employed, so that more open space is available in the ground floor. As the load path in the floating columns is not continuous, they are more vulnerable to the seismic activity. Sometimes, to meet the requirements these type of aspects cannot be avoided though these are not found to be of safe. Hence, an attempt is taken to study the behavior of a G+15 multi storey building in which some storey’s are considered for commercial purpose and remaining storey’s are for residential purpose. This paper studies the comparison & seismic analysis of the multistory buildings with floating column and without floating column. Finally, analysis & results in the high rise building such as storey drifts, storey displacement, and Base shear were shown in this study. Design and Analysis was carried out by using Extended Three Dimensional Analysis of Building Systems (ETABS) Software.
Analysis of multistoried braced steel space frame subjected to gravity and se...IJERA Editor
Steel structures are generally more flexible than other types of structure and lower in weight. Earthquake loads
are random in nature. It is difficult to predict them exactly. The action applied to a structure by an earthquake is
a ground movement with horizontal and vertical components. The horizontal movement is the most specific
feature of earthquake action because of its strength and because structures are generally better designed to resist
gravity than horizontal forces. These forces produce large stresses, strains, deformation and displacement
particularly in tall structures. To keep displacement within limit generally bracing is provided in steel structure. .
Bracings are generally used to increase lateral-stiffness, lateral- strength as well as lateral stability of the frame.
Variations in the column stiffness can influence the mode of failure and lateral stiffness of the bracing. In this
study steel frame is modeled and analyzed three Parts viz., (i) Model without Steel bracing (bare frame), (ii)
Model completely with fully braced steel frame („Cross‟ bracing), (iii) Model completely with fully braced steel
frame („Single diagonal‟ bracing).
Seismic Performance of Reinforced Cement Concrete Structures with and Without...ijtsrd
Passive energy dissipation have been used so far to dissipate the unwanted energy due to earthquake and heavy wind actions. The complete failure of the structures that has occurred in the past due to catastrophic earthquakes may be avoided with the use of such devices. The study is concerned with the use of accordion metallic dampers that uses hysteretic energy to dissipate the unwanted energy due to earthquake. It consists of corrugated thin wall tubes installed as a brace connection in the frame. The axial deformation of the accordion damper enhances the lateral buckling capacity and results in maximum reduction of the damaging measures. The study emphasizes the use of such dampers and in depth analysis is performed by subjecting the building to base excitations in order to assess the nonlinear performance of the dampers installed in the building Rahul Tahilyani | Dilip Budhlani ""Seismic Performance of Reinforced Cement Concrete Structures with and Without Viscous Dampers"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-2 , February 2020,
URL: https://www.ijtsrd.com/papers/ijtsrd30122.pdf
Paper Url : https://www.ijtsrd.com/engineering/civil-engineering/30122/seismic-performance-of-reinforced-cement-concrete-structures-with-and-without-viscous-dampers/rahul-tahilyani
Strengthening of RC Framed Structure Using Energy Dissipation DevicesIOSR Journals
A large numbers of existing buildings in India are severely deficient against earthquake forces and
the number of such buildings is growing very rapidly. This paper presents a way of using energy dissipation
devices for seismic strengthening of a RC framed structure. The objective was to improve the seismic
performance of the building to resist the earthquake. The viscous dampers are used as an energy dissipation
device in the form of single, double, inverted V, V type of dampers with different percentages of damping such
as 10%, 20% and 30% to prevent building from collapse in a major earthquake and also to control the damage
during earthquake. The performance of the buildings is assessed as per the procedure prescribed in ATC-40
and FEMA 356.
Analysis and Optimum Design for Steel Moment Resisting Frames to Seismic Exci...IJCMESJOURNAL
The essential purpose of this wander is to develop an Interior Penalty Function (IPF) based estimation to multi-storey steel traces for slightest weight of frames. The frames are proposed for contradicting even impact in view of seismic stacking close by gravity forces. Various structural stems are used for restricting seismic (lateral) forces; however steel moment resisting frames (MRFs) are considered for the present work. The framework solidifies codal courses of action of IS 800-2007, as needs be gets the edges with perfect weight for in-plane moments with lateral support of beam element. Strength and buckling criteria are considered as direct goals close by side constraints in formulating optimization problem. A Software program is made that uses an interior penalty function (IPF) for weight minimization of two-dimensional moment restricting steel encompassed structures. The program uses MATLAB, performs one dimensional interest, and structural design in an iterative technique. The design cases have exhibited that the proposed estimation gives a beneficial instrument to the practicing fundamental algorithm. The program is associated with 6 and 9 storey (4 bays) moment resisting frames (MRFs). The program showed its capacity of optimizing the largeness of two medium size frames. To get part obliges in frames an examination technique must be associated. In the present work Equivalent Lateral Force framework (ELF) and material nonlinear time history analysis (NTH) are associated and perfect qualities gained from both the examinations are contemplated.
Design & Analysis of High rise Building With & Without Floating Column Using ...IJSRD
At present buildings with floating column is a typical feature in the modern multistory construction in urban India. There are many projects in which floating columns are adopted, especially above the ground floor, where transfer girders are employed, so that more open space is available in the ground floor. As the load path in the floating columns is not continuous, they are more vulnerable to the seismic activity. Sometimes, to meet the requirements these type of aspects cannot be avoided though these are not found to be of safe. Hence, an attempt is taken to study the behavior of a G+15 multi storey building in which some storey’s are considered for commercial purpose and remaining storey’s are for residential purpose. This paper studies the comparison & seismic analysis of the multistory buildings with floating column and without floating column. Finally, analysis & results in the high rise building such as storey drifts, storey displacement, and Base shear were shown in this study. Design and Analysis was carried out by using Extended Three Dimensional Analysis of Building Systems (ETABS) Software.
Analysis of multistoried braced steel space frame subjected to gravity and se...IJERA Editor
Steel structures are generally more flexible than other types of structure and lower in weight. Earthquake loads
are random in nature. It is difficult to predict them exactly. The action applied to a structure by an earthquake is
a ground movement with horizontal and vertical components. The horizontal movement is the most specific
feature of earthquake action because of its strength and because structures are generally better designed to resist
gravity than horizontal forces. These forces produce large stresses, strains, deformation and displacement
particularly in tall structures. To keep displacement within limit generally bracing is provided in steel structure. .
Bracings are generally used to increase lateral-stiffness, lateral- strength as well as lateral stability of the frame.
Variations in the column stiffness can influence the mode of failure and lateral stiffness of the bracing. In this
study steel frame is modeled and analyzed three Parts viz., (i) Model without Steel bracing (bare frame), (ii)
Model completely with fully braced steel frame („Cross‟ bracing), (iii) Model completely with fully braced steel
frame („Single diagonal‟ bracing).
Seismic Performance of Reinforced Cement Concrete Structures with and Without...ijtsrd
Passive energy dissipation have been used so far to dissipate the unwanted energy due to earthquake and heavy wind actions. The complete failure of the structures that has occurred in the past due to catastrophic earthquakes may be avoided with the use of such devices. The study is concerned with the use of accordion metallic dampers that uses hysteretic energy to dissipate the unwanted energy due to earthquake. It consists of corrugated thin wall tubes installed as a brace connection in the frame. The axial deformation of the accordion damper enhances the lateral buckling capacity and results in maximum reduction of the damaging measures. The study emphasizes the use of such dampers and in depth analysis is performed by subjecting the building to base excitations in order to assess the nonlinear performance of the dampers installed in the building Rahul Tahilyani | Dilip Budhlani ""Seismic Performance of Reinforced Cement Concrete Structures with and Without Viscous Dampers"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-2 , February 2020,
URL: https://www.ijtsrd.com/papers/ijtsrd30122.pdf
Paper Url : https://www.ijtsrd.com/engineering/civil-engineering/30122/seismic-performance-of-reinforced-cement-concrete-structures-with-and-without-viscous-dampers/rahul-tahilyani
Strengthening of RC Framed Structure Using Energy Dissipation DevicesIOSR Journals
A large numbers of existing buildings in India are severely deficient against earthquake forces and
the number of such buildings is growing very rapidly. This paper presents a way of using energy dissipation
devices for seismic strengthening of a RC framed structure. The objective was to improve the seismic
performance of the building to resist the earthquake. The viscous dampers are used as an energy dissipation
device in the form of single, double, inverted V, V type of dampers with different percentages of damping such
as 10%, 20% and 30% to prevent building from collapse in a major earthquake and also to control the damage
during earthquake. The performance of the buildings is assessed as per the procedure prescribed in ATC-40
and FEMA 356.
Analysis of multistoried braced frame subjected to seismic and gravity loading.IJERA Editor
The structure in high seismic areas may be susceptible to the severe damage. Along with gravity load structure has to withstand to lateral load which can develop high stresses. Now-a-days, shear wall in R.C. structure and steel bracings in steel structure are most popular system to resist lateral load due to earthquake, wind, blast etc. bracing is a highly efficient and economical method of resisting horizontal forces in a frame structure. Bracing is efficient because the diagonals work in axial stress and therefore call for minimum member sizes in providing stiffness and strength against horizontal shear. Through the addition of the bracing system, load could be transferred out of the frame and into the braces, by passing the weak columns while increasing strength. In this study Steel Frame is modeled and analyzed three Parts viz., (i) Model without Steel bracing (bare frame), (ii) Model completely Steel braced (fully braced frame), (iii) Model with partially Steel bay wise braced frames. The computer aided analysis is done by using STAAD-PRO to find out the effective lateral load system during earthquake in high seismic areas.
Behavior of plan irregularites using composite members by varying column spac...eSAT Journals
Abstract
Several studies proofs that the weaker columns has low seismic resistance, for this it is need to make the column stronger. The stronger columns can be obtained by many ways, here in this paper steel-concrete composite columns are considered. Use of composite columns in construction reduces the cross-section of the columns throughout the building and also increases the lateral-load resisting capacity to columns. The models consists of G+10, G+15, G+20 stories of Rectangular, L, T and plus shaped structures in which column spacing are varied as 3m, 4m, 5m and 6m along both directions in all structures. For all models the composite-column of size 450x450mm (ISMB 250) is kept constant, only the beam size has been varied accordingly while modeling a structure. The Response Spectrum analysis is done for all the buildings using ETABS version 15. Study is based on the performance of a multi-story building with plan irregularity under major earthquake forces by considering parameters like displacement, storey shear and drifts. Even though the cross section of the column considered is very small for tall buildings, the structure behaves stiff for severe seismic zone-V and also for different conditions; this is done by introducing steel-concrete composite column in a given building. Hence it is concluded that the use of composite columns in construction resists the lateral forces for many vulnerable conditions.
Keywords: Composite Column, Irregular Structure, Seismic Zone, Varying Height, Column Spacing.
Seismic Analysis of G 10 Storey Building with Various Locations of Shear Wall...ijtsrd
Shear walls are specially designed structural members provided in the multi storey buildings to resist lateral forces. These walls have very high in plane strength and stiffness, which can resist large horizontal forces and can support gravity loads. There are lots of literatures available to design and analyse the shear wall. Ravi Kumar Vishwakarma | Vipin Kumar Tiwari "Seismic Analysis of G+10 Storey Building with Various Locations of Shear Walls using Etabs" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-4 , June 2021, URL: https://www.ijtsrd.compapers/ijtsrd43646.pdf Paper URL: https://www.ijtsrd.comengineering/structural-engineering/43646/seismic-analysis-of-g10-storey-building-with-various-locations-of-shear-walls-using-etabs/ravi-kumar-vishwakarma
Effect of Stiffening System on Building Resistance to Earthquake ForcesIOSRJMCE
Multi-story steel buildings of various heights under the action of earthquake force are analyzed by using time-history analysis technique. The ground motion records of El Centro, California in 1940 are considered in this study. Different types of stiffening systems (bracing and shear walls) are used for the considered buildings. The main objective of this study is to evaluate the response of steel structures subjected to earthquake excitation and to investigate the effect of various stiffening systems in improving the response of these buildings. The finite element method of SAP 2000 V17program is used in the analysis. A static analysis is conducted to obtain an indication on the stiffness of the studied stiffening models in order to interpret the stiffness effect on the response of the structures under the seismic load. It is found that, the natural period of a structure is highly affected by the height of the structure and the used stiffeningsystem. It is inversely proportional with the stiffness and directly proportional with the height of the structure. It is concluded that the roof displacement andits maximum value at a specific momentdoes not give a clear indication for the behavior of building. Therefore the full time response of the building must be considered. Also it has been concluded that it is not necessarily when the stiffness of a building increases, the roof or any story displacement of the building decreases under earthquake load.
Comparison of performance of lateral load resisting systems in multi storey f...eSAT Journals
Abstract This paper introduces the comparison between lateral load resisting systems in multi storey building. Multi storey building
composed of very special class of structure and therefore require special treatment. Hence to overcome the effects of seismic
forces, Flat slab system in which slab rests on drop or capital which is connected to column is induced with different load
resisting systems. The combined systems which is used to withstand seismic forces in this study are 1. Flat slab without lateral
load resisting system, 2. Flat slab with shear wall, 3. Flat slab with infill wall, 4. Flat slab with bracings, 5. Flat slab with shear
wall and bracings. ETABS software version is used to accomplish dynamic analysis and also building is investigated for nonlinear
static analysis in order to identify seismic demands. From the obtained results conclusions are drawn.
Keywords: Capital, Bracings, Dynamic, and Treatment etc…
seismic response of multi storey building equipped with steel bracingINFOGAIN PUBLICATION
Steel bracing has proven to be one of the most effective systems in resisting lateral loads. Although its use to upgrade the lateral load capacity of existing Reinforced Concrete (RC) frames has been the subject of numerous studies, guidelines for its use in newly constructed RC frames still need to be developed. In this paper the study reveals that seismic performance of moment resisting RC frames with different patterns of bracing system. The three different types of bracings were used i.e. X - bracing system, V - bracing system and Inverted V - bracing system. This arrangement helped in reducing the structural response (i.e. displacement, interstorey drift, Shear Forces & Bending Moments) of the designed building structure. An (G+6) storey building was modelled and designed as per the code provisions of IS-1893:2002. And linear analysis is been carried out in the global X direction. The analysis was conducted with a view of accessing the seismic elastic performance of the building structure.
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,
Seismic Capacity Comparisons of Reinforced Concrete Buildings Between Standar...drboon
Earthquakes are cause of serious damage through the building. Therefore, moment resistant frame buildings are widely used as lateral resisting system. Generally three types of moment resisting frames are designed namely Special ductile frames (SDF), Intermediate ductile frames (IDF) and Gravity load designed (GLD) frames, each of which has a certain level of ductility. Comparative studies on the seismic performance of three different ductility of building are performed in this study. The analytical models are considered about failure mode of column (i.e. shear failure, flexural to shear failure and flexural failure); beam-column joint connection, infill wall and flexural foundation. Concepts of incremental dynamic analysis are practiced to assess the required data for performance based evaluations. This study found that the lateral load capacity of GLD, IDF, and SDF building was 19.25, 27.87, and 25.92 %W respectively. The average response spectrum at the collapse state for GLD, IDF, and SDF are 0.75 g, 1.19 g, and 1.33 g, respectively. The results show that SDF is more ductile than IDF and the initial strength of SDF is close to IDF. The results indicate that all of frames are able to resistant a design earthquake.
Effect of Friction Dampers on RC Structures Subjected to Earthquakeijtsrd
Among all the natural disasters such as flood, earthquake, drought, hurricanes the least understood and the most destructive one is earthquake. Since, they cause many of injuries and economical losses leaving behind a series of signs of panic. Necessity to implement seismic codes in building design. For this a better method of analysis such as static analysis, dynamic analysis and time history analysis has to be adopted for performing the structures seismic risk assessment. This dissertation work is concerned with the "Studies on Effect of Friction Dampers on the Seismic Performance of RC G 15 Storey Buildings" According to IS 1893 part 1 2002 codal provisions the structures are analyzed by Equivalent Static method and Time History method. The modeling and analysis is done with ETAB SOFTWARE and the results obtained are seismic parameters such as Time period, Base shear, Lateral displacement and Inter storey drift, storey stiffness, storey accelaration are tabulated and then comparative study of structures with and without Friction dampers has been done. Akshay R | B. S. Suresh Chandra "Effect of Friction Dampers on RC Structures Subjected to Earthquake" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd28017.pdfPaper URL: https://www.ijtsrd.com/engineering/structural-engineering/28017/effect-of-friction-dampers-on-rc-structures-subjected-to-earthquake/akshay-r
Analysis of multistoried braced frame subjected to seismic and gravity loading.IJERA Editor
The structure in high seismic areas may be susceptible to the severe damage. Along with gravity load structure has to withstand to lateral load which can develop high stresses. Now-a-days, shear wall in R.C. structure and steel bracings in steel structure are most popular system to resist lateral load due to earthquake, wind, blast etc. bracing is a highly efficient and economical method of resisting horizontal forces in a frame structure. Bracing is efficient because the diagonals work in axial stress and therefore call for minimum member sizes in providing stiffness and strength against horizontal shear. Through the addition of the bracing system, load could be transferred out of the frame and into the braces, by passing the weak columns while increasing strength. In this study Steel Frame is modeled and analyzed three Parts viz., (i) Model without Steel bracing (bare frame), (ii) Model completely Steel braced (fully braced frame), (iii) Model with partially Steel bay wise braced frames. The computer aided analysis is done by using STAAD-PRO to find out the effective lateral load system during earthquake in high seismic areas.
Behavior of plan irregularites using composite members by varying column spac...eSAT Journals
Abstract
Several studies proofs that the weaker columns has low seismic resistance, for this it is need to make the column stronger. The stronger columns can be obtained by many ways, here in this paper steel-concrete composite columns are considered. Use of composite columns in construction reduces the cross-section of the columns throughout the building and also increases the lateral-load resisting capacity to columns. The models consists of G+10, G+15, G+20 stories of Rectangular, L, T and plus shaped structures in which column spacing are varied as 3m, 4m, 5m and 6m along both directions in all structures. For all models the composite-column of size 450x450mm (ISMB 250) is kept constant, only the beam size has been varied accordingly while modeling a structure. The Response Spectrum analysis is done for all the buildings using ETABS version 15. Study is based on the performance of a multi-story building with plan irregularity under major earthquake forces by considering parameters like displacement, storey shear and drifts. Even though the cross section of the column considered is very small for tall buildings, the structure behaves stiff for severe seismic zone-V and also for different conditions; this is done by introducing steel-concrete composite column in a given building. Hence it is concluded that the use of composite columns in construction resists the lateral forces for many vulnerable conditions.
Keywords: Composite Column, Irregular Structure, Seismic Zone, Varying Height, Column Spacing.
Seismic Analysis of G 10 Storey Building with Various Locations of Shear Wall...ijtsrd
Shear walls are specially designed structural members provided in the multi storey buildings to resist lateral forces. These walls have very high in plane strength and stiffness, which can resist large horizontal forces and can support gravity loads. There are lots of literatures available to design and analyse the shear wall. Ravi Kumar Vishwakarma | Vipin Kumar Tiwari "Seismic Analysis of G+10 Storey Building with Various Locations of Shear Walls using Etabs" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-4 , June 2021, URL: https://www.ijtsrd.compapers/ijtsrd43646.pdf Paper URL: https://www.ijtsrd.comengineering/structural-engineering/43646/seismic-analysis-of-g10-storey-building-with-various-locations-of-shear-walls-using-etabs/ravi-kumar-vishwakarma
Effect of Stiffening System on Building Resistance to Earthquake ForcesIOSRJMCE
Multi-story steel buildings of various heights under the action of earthquake force are analyzed by using time-history analysis technique. The ground motion records of El Centro, California in 1940 are considered in this study. Different types of stiffening systems (bracing and shear walls) are used for the considered buildings. The main objective of this study is to evaluate the response of steel structures subjected to earthquake excitation and to investigate the effect of various stiffening systems in improving the response of these buildings. The finite element method of SAP 2000 V17program is used in the analysis. A static analysis is conducted to obtain an indication on the stiffness of the studied stiffening models in order to interpret the stiffness effect on the response of the structures under the seismic load. It is found that, the natural period of a structure is highly affected by the height of the structure and the used stiffeningsystem. It is inversely proportional with the stiffness and directly proportional with the height of the structure. It is concluded that the roof displacement andits maximum value at a specific momentdoes not give a clear indication for the behavior of building. Therefore the full time response of the building must be considered. Also it has been concluded that it is not necessarily when the stiffness of a building increases, the roof or any story displacement of the building decreases under earthquake load.
Comparison of performance of lateral load resisting systems in multi storey f...eSAT Journals
Abstract This paper introduces the comparison between lateral load resisting systems in multi storey building. Multi storey building
composed of very special class of structure and therefore require special treatment. Hence to overcome the effects of seismic
forces, Flat slab system in which slab rests on drop or capital which is connected to column is induced with different load
resisting systems. The combined systems which is used to withstand seismic forces in this study are 1. Flat slab without lateral
load resisting system, 2. Flat slab with shear wall, 3. Flat slab with infill wall, 4. Flat slab with bracings, 5. Flat slab with shear
wall and bracings. ETABS software version is used to accomplish dynamic analysis and also building is investigated for nonlinear
static analysis in order to identify seismic demands. From the obtained results conclusions are drawn.
Keywords: Capital, Bracings, Dynamic, and Treatment etc…
seismic response of multi storey building equipped with steel bracingINFOGAIN PUBLICATION
Steel bracing has proven to be one of the most effective systems in resisting lateral loads. Although its use to upgrade the lateral load capacity of existing Reinforced Concrete (RC) frames has been the subject of numerous studies, guidelines for its use in newly constructed RC frames still need to be developed. In this paper the study reveals that seismic performance of moment resisting RC frames with different patterns of bracing system. The three different types of bracings were used i.e. X - bracing system, V - bracing system and Inverted V - bracing system. This arrangement helped in reducing the structural response (i.e. displacement, interstorey drift, Shear Forces & Bending Moments) of the designed building structure. An (G+6) storey building was modelled and designed as per the code provisions of IS-1893:2002. And linear analysis is been carried out in the global X direction. The analysis was conducted with a view of accessing the seismic elastic performance of the building structure.
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,
Seismic Capacity Comparisons of Reinforced Concrete Buildings Between Standar...drboon
Earthquakes are cause of serious damage through the building. Therefore, moment resistant frame buildings are widely used as lateral resisting system. Generally three types of moment resisting frames are designed namely Special ductile frames (SDF), Intermediate ductile frames (IDF) and Gravity load designed (GLD) frames, each of which has a certain level of ductility. Comparative studies on the seismic performance of three different ductility of building are performed in this study. The analytical models are considered about failure mode of column (i.e. shear failure, flexural to shear failure and flexural failure); beam-column joint connection, infill wall and flexural foundation. Concepts of incremental dynamic analysis are practiced to assess the required data for performance based evaluations. This study found that the lateral load capacity of GLD, IDF, and SDF building was 19.25, 27.87, and 25.92 %W respectively. The average response spectrum at the collapse state for GLD, IDF, and SDF are 0.75 g, 1.19 g, and 1.33 g, respectively. The results show that SDF is more ductile than IDF and the initial strength of SDF is close to IDF. The results indicate that all of frames are able to resistant a design earthquake.
Effect of Friction Dampers on RC Structures Subjected to Earthquakeijtsrd
Among all the natural disasters such as flood, earthquake, drought, hurricanes the least understood and the most destructive one is earthquake. Since, they cause many of injuries and economical losses leaving behind a series of signs of panic. Necessity to implement seismic codes in building design. For this a better method of analysis such as static analysis, dynamic analysis and time history analysis has to be adopted for performing the structures seismic risk assessment. This dissertation work is concerned with the "Studies on Effect of Friction Dampers on the Seismic Performance of RC G 15 Storey Buildings" According to IS 1893 part 1 2002 codal provisions the structures are analyzed by Equivalent Static method and Time History method. The modeling and analysis is done with ETAB SOFTWARE and the results obtained are seismic parameters such as Time period, Base shear, Lateral displacement and Inter storey drift, storey stiffness, storey accelaration are tabulated and then comparative study of structures with and without Friction dampers has been done. Akshay R | B. S. Suresh Chandra "Effect of Friction Dampers on RC Structures Subjected to Earthquake" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd28017.pdfPaper URL: https://www.ijtsrd.com/engineering/structural-engineering/28017/effect-of-friction-dampers-on-rc-structures-subjected-to-earthquake/akshay-r
Structural Behaviors of Reinforced Concrete Dome with Shell System under Vari...ijtsrd
There are many different systems constructing dome structure. Among them, the shell system is the most popular in reinforcement concrete structure in these days. Therefore, it is necessary to know the structural behaviours of it. The objectives of this journal is to study the structural behaviours of the reinforced concrete dome structure with shell system under gravity loading and lateral loading in cyclone wind categories and various seismic zones. Seismic loads are considered from zone 1 to zone 4 based on UBC 1997 .Wind loads are considered from I to V category as cyclone categories. Structural elements of RC dome structure are designed according to Building Code of American Concrete Institute ACI 318 99 . With these member forces obtained from the SAP 2000 analysis, the design for all structural members will be performed according to ACI 318 99. The members of dome structure are designed as an intermediate moment resisting frame. The design of the shell beams is verified by using hand calculations with the output forces under the gravity loading and lateral loading obtained from the SAP2000 analysis. Equivalent static analysis procedure is used in this study. Based on the comparison of analysis results, it can be observed where the maximum deflection occurs along the meridian direction under seismic and wind loading conditions. Then, the axial force of dome structure is significant than any other forces in shell system. From the study of analysis results of both systems, it has been noticed that the bottom ring in shell system is essential to control the forces from the shell area. Khine Zar Aung | Khin Aye Mon | Khin Thanda Htun "Structural Behaviors of Reinforced Concrete Dome with Shell System under Various Loading Conditions" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd27839.pdfPaper URL: https://www.ijtsrd.com/engineering/civil-engineering/27839/structural-behaviors-of-reinforced-concrete-dome-with-shell-system-under-various-loading-conditions/khine-zar-aung
Strengthening of R.C Framed Structure Using Energy Dissipating Devicespaperpublications3
Abstract: The Dampers which is added to the building scheme without any interruption to the present constituent of the building. In past days retrofitting structures are use full in the construction field however a good understanding of restraints involvement to increase the structure capacities and decreasing the seismic demand in specifically to the design process. In this work consider the energy dissipating devices for seismic strengthening of 5 stories concrete structure in this study involves viscous damping devices of V Type and Inverted V Type dampers with different effective stiffness, to prevent building damage or collapse in major earthquake.
Comparative Study on Dynamic Analysis of Irregular Building with Shear WallsEditor IJCATR
South East Asia including Myanmar is situated in secondary seismic belt. Therefore, it is necessary to pay special attention of the
effect of earthquake in designing the high-rise building. Shear walls are very common in high rise reinforced concrete building. In this study,
comparative analysis of high-rise reinforced concrete irregular building with shear walls are present. The frame type of proposed building is
used the special RC moment resisting frame. It belongs to seismic zone 4. This is why, seismic forces are essentially considered in the analysis
of this building and shear walls are also provided to resist seismic forces. Structural members are designed according to ACI Code 318-02. The
structure is analysed by using ETABS v 9.7.1 software. Load consideration is based on UBC-97. All necessary load combinations are
considered in shear walls analysis and frame analysis. In addition wind load, seismic load is considered as external lateral load in the dynamic
analysis. In dynamic analysis; Response Spectrum method is used. In this project, study of 14 storey building is presented with some
investigation which is analyzed by changing various location of shear wall for determining parameters like storey drift, storey shear and storey
moment .
Seismic Retrofitting of a RC Building by Adding Steel Plate Shear WallsIOSR Journals
This paper deals with the step-by-step retrofitting of buildings by using steel plate shear walls
(SPSWs) with the aid of SAP2000 programme. One type of reinforced concrete building is selected for
evaluation. This building represents the most used forms of residential buildings in the Sudan, in terms of
geometric form, and dimensions. This paper uses the equivalent static method provided in the regulations
proposed by the Egyptian Society for Earthquake Engineering. One typical model was selected from the existing
residual buildings in Khartoum city, as a case study. The proposed methodology that has been used to evaluate
the seismic resistance of chosen building is done through the design of the structural elements of the buildings
before and after adding the seismic forces. The retrofitting of building was done by using steel plate shear walls
with thicknesses of 5mm, 7mm and 10mm. From the results obtained, it was found that the use of two additional
SPSWs with 7 mm thickness placed at the internal frame of the existing system, resulted in a reduction of
bending moments in the columns and beams. The increase of thickness has a clear effect on the bending moment
of the columns, but has little effects on the bending moments of the beams.
Comparative Study of Seismic Analysis of Building with Light Weight and Conve...Dr. Amarjeet Singh
In recent decades, the lightweight materials are used
in construction instead of conventional material. Lightweight
construction is considered to be favourable due to the saving
in construction cost and materials. AAC block is a lightweight
structural material with excellent acoustic and thermal
insulation properties. Due to the use of lightweight material in
construction in seismic zone reduce the percentage of
damages. In this paper the attempt has been made to carry out
the project comparative study of seismic analysis of building
with lightweight and conventional material. Structural model
of multi storey building (G+3) and analysis is carried out in
STAAD-Pro by RSM (Response Spectrum Method). Building
using infill AAC (Autoclaved aerated concrete) block and
conventional clay brick masonry are designed for the same
seismic hazard in accordance with the applicable provisions
given in Indian codes. The analytical results of the buildings
will be compared. The project is also aimed at getting
familiarity with STAAD-Pro.2008.
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.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
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.
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.
1. International Journal of Research in Advent Technology, Vol.2, No.9, September 2014
E-ISSN: 2321-9637
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Analysis of Seismic and Wind Effect on Steel Silo
Supporting Structures
Ashwini Bidari1, K.N.Vishwanath2
M. Tech student1 , Dept of Civil Engineering1 , DSCE , Bangalore ,Karnataka, India1
Associate Professor2 , Dept of Civil Engineering2 , DSCE , Bangalore, Karnataka, India2
E-mail: bidariashwini@gmail.com1, vishuknv@yahoo.com2
Abstract - India’s economic growth is contingent upon the growth of the Indian steel industry. Consumption of
steel is taken to be an indicator of economic development. In steel plants, steel silos are used for the storage of
bulk materials. However, steel silos differ principally from their concrete counterparts in physical properties like
the high strength per unit weight and ductility. The high yield and ultimate strength result in slender sections.
Being ductile the steel structures give sufficient advance warning before failure by way of excessive
deformations. Steel silo is elevated and supported by frames. This paper describes the analysis and design of
high-rise steel building frame with braced and without braced under effect of wind and earthquake using
SAP2000 and also to compare the response of braced and unbraced building which subjected to horizontal or
lateral loading system. Dynamic analysis is carried out by using Equivalent Static method and Response
spectrum method for earthquake zone V as per Indian code. The results in terms of Natural period, Design Base
shear, lateral Displacements are compared for the different silo supporting models considered in the present
study. The braced system gives the economical results compared to unbraced system in terms of frequency and
displacement
Index Terms - Silo, Linear bracing system, Moment-Resisting frame, Dynamic action, SAP2000
1. INTRODUCTION
cylindrical shell and a conical hopper and they
Industrial buildings are generally designed as
could be elevated and supported by frames or
enclosures that provide functional space for
reinforced concrete columns or on discrete
internal activities, which may involve use of
supports. As a result, silos are designed and
overhead cranes or suspended equipments. Various
evaluated as special structures. The purpose of this
structural forms have been developed over the last
study is to compare the analysis of seismic and
30 years that optimise the cost of the steel structure
wind effects on two supporting structures for steel
in relation to the space provided. Both structural
silo and these are linear lateral force resisting
and seismic engineering are involved in the design
systems. These systems are, Special concentrically
of new industrial facilities, but have certainly a
braced frame (SCBF) and special moment-resisting
primary role in the evaluation and upgrading of
frame (SMRF). These system provides several
existing plants. Furthermore, their design is very
advantages as compare to other lateral load
standardized worldwide and thus they represent a
resisting system because it has ductility and the
challenging topic in the contexts of an industrial
energy absorption capacity which make these
risk assessment related to external hazards like
system suitable to be used as wind and seismic
earthquakes and wind. In fact, their dynamic
resistant element in the steel structures.
response is not trivial, since material/structure
interactions are relevant and influence the
susceptibility to seismic damage. Therefore in any
2. OBJECTIVES OF THE STUDY
Industrial structures the storage of bulk solids is an
· To compare the response of braced and
important aspect. Bin is a structure meant for
unbraced building subjected to lateral loads.
storing bulk material in vertical direction with
· outlets for withdrawal either by gravity alone or by
To determine the natural time period, total
base shear distribution and lateral
gravity assisted by flow promoting devices. A bin
displacement, using linear static method and
is of two kinds viz, bunker and silo. A shallow
response spectrum analysis as per
structure whose cross section is square or
rectangular in plan is called bunker, and tall
IS:1893(Part1)-2002.
structure whose cross section is circular or
· To compare the natural time period, total
polygonal is called silo. In this study, silo is an
base shear distribution and lateral
inclusive term for all steel structures for the storage
displacement for Special concentrically
of bulk solids. Steel silos in common use, may be
braced frame (SCBF) and special moment-resisting
ground-supported or elevated. Typical elevated
frame (SMRF) and thereby decide
silos generally consist of a conical roof, a
whichever paramount under dynamic
loading.
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· To compare the cost effectiveness of
Special concentrically braced frame (SCBF)
over special moment-resisting frame
(SMRF) for building structures.
3. DETAILS OF THE STRUCTURES
3.1. Assumptions
The assumptions are made as follows:
In the present study the structure
considered is a Day bin (silo) building at Pellet
plant at a place called BHUJ for Jindal steel and
power limited. The bin provided in this building
stores the raw materials required for one day for
processing. The bin receives the raw materials from
a conveyor the gallery of which is having the next
support at 24m from the building. Day bin building
accommodates head pulley and drive of in-coming
conveyor. The incoming conveyors are located at
higher level at El. + 36.2m as shown in fig 2.1. The
total height of the building is 40.9m. The plan
dimension of the building is 9mx9m. The study is
carried out on the same building plan for both
braced and unbraced frame and the loading on both
types of building kept same. Silo load is considered
acting on frame where it got supported to the
building.
Fig. 1. Steel silo supported on frame with conveyor gallery
3.2. Modelling and Analysis
The silo supporting structures are modeled and
analysed by SAP2000. SAP2000 is anything that
has a fixed form inputs, meaning that material
properties, equilibrium and compatibility equation,
energy and work principals, incompatible elements,
boundary conditions, analysis methods, design
principals and philosophy. Also, the information
about building and site condition, meaning that the
number of frames with spacing of columns
longitudinal direction and transverse direction. The
number of stories and types of diaphragm, usage of
building, soil condition, wind and seismicity
condition. The typical buildings are compared for
dynamic analysis with different methods.
.
Fig. 2. Model I
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Fig. 3. Model II
3.3. Structural Loads
Different structural loads that the building typically
must carry are
- Dead load
- Live load
- Equipment load
- wind load
- Seismic load
Forces that act vertically are gravity loads like dead
load, live load, Equipment load. Forces that act
horizontally, such as wind and seismic events
require lateral load resisting systems to be built into
structures. As lateral loads are applied to a
structure, horizontal diaphragms (floors and roofs)
transfer the load to the lateral load resisting
system.
4. DESCRIPTION FOR LOADING
The loading on the structure is considered as per
following calculations
Density of Iron ore taken as 29.42 kN/m3
I. On Roof
a. Live Load = 75 kg/sqm
b. Dead Load = 30 kg/sqm
II. Floor Load
a. Dead Load of grating = 40
kg/sqm
b. Live Load = 500 kg/sqm
III. Belt tensions at head pulley
a. T1 = 25000 kg (tight side)
b. T2 = 6500 kg (slack side)
IV. Conveyor Gallery Load (assuming next
support of the gallery at 24m from the
building)
a. Dead Load = 1600 kg/m
b. Dead load per support on the
building=1600X0.5X12=4800 kg
c. Live Load due to material in the
conveyor gallery = 400 kg/m
d. Live load on walk way each side
= 300 kg/m
e. Live load per support on the
building = ((400X0.5)+300)X12
= 6000 kg
V. Conveyor Load (inside the building)
a. Dead load of conveyor=400 kg/m
b. Dead load of conveyor per side =
400X0.5 = 200 kg/m
c. Live load of conveyor due to
material = 400 kg/m
d. Live load due material per side =
400X0.5 = 200 kg/m
VI. Equipment Load
a. Drive/Head pulley and pulley
support = 5000 kg
b. Drive load (motor, gear box &
supporting frames) = 6500 kg
c. Monorail = 2500 kg
VII. Chute Load
a. Dead Load = 6000 kg
b. Material Load under choked
condition = 20000 kg
VIII. Earthquake Forces Data: Earthquake load
for the structure has been calculated as per
IS-1893-2002:
i. Zone (Z) =V
ii. Response Reduction Factor ( RF ) For
Braced Frame = 4
iii. Response Reduction Factor ( RF ) For
Unbraced Frame = 5
iv. Importance Factor ( I ) = 1
v. Soil condition = Medium
vi. Zone factor = 0.36
vii. Type of Structures = 2
viii. Damping Ratio (DM) = 0.02
IX. Wind Forces Data: Wind load for the
structure has been calculated as per IS 875
(part-3):
Wind speed =50 m/s
Terrain category = 2
Structure class = B
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Risk coefficient (K1 factor) = 1
Topography (k3 factor) = 1
X. Load Combinations:
Load combinations for design purpose shall be the
one that produces maximum forces in the members
and consequently maximum stresses. When the
effect of wind or earthquake load is taken into
account, the permissible stresses specified may be
exceeded by 33.33 percent. In the present study, to
take care of the increase in stress, the working load
is reduced by 33.33 percent and the combined
stress ratio is maintained at unity. The following
load combinations are considered for the analysis
and design as per IS 800 1984.
Table 3.1 Load combinations as per IS 1893 (Part
I) -2002
Load
Combination
Load Factors
Gravity
Analysis
DL+LL
DL+LL+EQUIP
Wind
0.75(DD+LL+EQUIP+WIND-X)
0.75(DD+LL+EQUIP+WIND-Y)
0.675DL+0.75WIND-X
0.675DL+0.75WIND-Y
Equivalent
Static Analysis
0.75(DD+LL+EQUIP+EQX)
0.75(DD+LL+EQUIP+EQY)
0.675DL+0.75EQX
0.675DL+0.75EQY
Response
Spectrum
Analysis
0.75(DD+LL+EQUIP+RSX)
0.75(DD+LL+EQUIP+RSY)
0.675DL+0.75RSX
0.675DL+0.75RSY
Where
DL= Dead Load
LL= Live Load
EQUIP = Equipment load
WIND-X, WIND-Y = Wind load in X & Y
direction respectively
EQX, EQX = Earthquake load in X & Y direction
respectively
RSX, RSY = Response Spectrum Load in X & Y
direction respectively
5. RESULTS AND DISCUSSIONS
The results are presented for each of the building
model considered, for the static and dynamic
analyses carried out by SAP2000 package. Both
wind and earthquakes cause dynamic action on
building. But, design for wind forces and for
earthquake effects are distinctly different. The
intuitive philosophy of structural design uses force
as the basis, which is consistent in wind design,
wherein the building is subjected to a pressure on
its exposed surface area; this is force-type loading.
However, in earthquake design, the building is
subjected to random motion of the ground at its
base, which induces inertia forces in the building
that in turn cause stresses; this is displacement-type
loading.
In this work, analysis of symmetrical braced and
unbraced building is carried out for both actions
and found out which dynamic action is governing.
Comparison of different performance
characteristics are made to check the performance
of unbraced and braced building. Bracing is done
with different angle sections. The results are in
terms of natural periods of vibrations, lateral
displacements, and total base shear distribution for
different building models. These are presented and
compared.
5.1 Natural Period
Every building has a number of natural
frequencies, at which it offers minimum resistance
to shaking induced by external effects (like
earthquakes and wind) and internal effects (like
motors fixed on it). The mode of oscillation with
the smallest natural frequency (and largest natural
period) is called the Fundamental Mode; the
associated natural period T1 is called the
Fundamental Natural Period. But in the present
work we have considered 15 modes, for which
natural period is obtained from analysis. The
natural periods shown in table are obtained from
analysis results. The results show that there is
significant change in the natural period of braced
frame as compared to unbraced frame.
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1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
Braced
Unbraced
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Time period
Modes
Fig. 4. Comparison of Time period values of braced and unbraced frame
5.2 Base Shear
Base shear is obtained from both wind and seismic
analysis, in which the seismic effect is governed
over wind effect as shown in Figs 4.2-4.5. In the
response spectrum method the design of total base
shear (Vb) is made equal to the base shear obtained
from equivalent static method Vb as per IS:
1893(Part1)-2002 by applying the scaling factor. In
seismic analysis the base shear produce in X and Y
direction is same because stiffness of building is
same in both direction. As the stiffness of bracing
sections increases, the base shear in building also
increases in both directions. Fig. 4.4 and Fig.4.5
shows that the base shear in bracing system is more
as compared to unbraced system
1000
800
600
400
200
0
Model I Model II
Wind-X
Models
Base shear( KN)
Fig. 5. Comparison of Base Shear for Model I and Model II in X direction
1000
800
600
400
200
0
Model I Model II
Wind-Y
Base shear (KN)
MODELS
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Fig. 6. Comparison of Base Shear for Model I and Model II in Y direction
2500
2000
1500
1000
500
0
Braced Frame Unbraced Frame
EQX
RSX
MODELS
Base Shear
Fig. 7. Comparison of Base Shear for Model I and Model II in X direction
2500
2000
1500
1000
500
0
Braced Frame Unbraced Frame
EQY
RSY
MODELS
Base Shear
Fig. 8. Comparison of Base Shear for Model I and Model II in Y direction
5.3 Seismic Weight
Mass of a building that is effective in lateral
oscillation during earthquake shaking is called the
seismic mass (weight) of the building. It is the sum
of its seismic masses at different floor levels.
Seismic mass at each floor level is equal to full
dead load plus appropriate fraction of live load.
The fraction of live load depends on the intensity of
the live load and how it is connected to the floor.
Seismic design codes of each country/region
provide fractions of live loads to be considered for
design of buildings to be built in that
country/region. Therefore in the present study,
according to Indian code practice we have
considered 50% of live load for seismic weight as
shown in Table 5.4. It is seen in table 5.4 clearly
the seismic weight is more for unbraced frame as
compare to braced frame.
20000
19500
19000
18500
18000
17500
17000
16500
DL+0.5LL+EL
Braced
Unbraced
Seismic
Fig. 9. Comparison of seismic weight for braced and unbraced frame
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5.4 Lateral Displacement
Lateral displacement profiles for Braced and
Unbraced buildings models obtained by both wind
and seismic effect. In seismic, equivalent static
method (ESM) and response spectrum method
(RSM) are shown in following figures that give the
values of lateral displacement along longitudinal
direction and traverse direction.
60
50
40
30
20
10
0
1 2 3 4
Lateral Displacement (mm)
Model I
Model II
Floor Level
Fig. 10. Lateral displacement of model I and Model II for winding loading
in X direction
45
40
35
30
25
20
15
10
5
0
1 2 3 4
MODEL I
MODEL II
Lateral Displacement(mm)
Levels of Frames
Fig. 11. Lateral displacement of model I and Model II for winding loading
in Y direction
70
60
50
40
30
20
10
0
1 2 3 4
MODEL I
MODEL II
Lateral Displacement (mm)
Floor Level
Fig. 12. Lateral displacement of model I and Model II for EQX
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12
10
8
6
4
2
0
1 2 3 4
MODEL I
MODEL II
Floor Level
Fig. 13. Lateral displacement of model I and Model II for RSX
60
50
40
30
20
10
Fig. 14. Lateral displacement of model I and Model II for EQY
30
25
20
15
10
5
Fig. 15. Lateral displacement of model I and Model II for RSY
Lateral Displacement (mm)
0
1 2 3 4
MODEL I
MODEL II
Lateral Displacement(mm)
Floor Level
0
1 2 3 4
MODEL I
MODEL II
Lateral Displacement (mm)
Levels of Frame
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6. CONCLUSIONS
On the basis of the present study, following
conclusions are made:
1. The frequency of the building is increased for
about 45% by providing bracing system. Thus
providing bracing system increases the
stability of the structure, especially in earth
quake prone areas or under dynamic loading.
2. The Base shear is more for seismic effect as
compare to wind effect. So the seismic governs
over wind in zone V. Base shear is increased
for braced compare to unbraced system.
3. The displacement for braced and unbraced
structure is well within permissible limit. The
lateral displacement of braced building
decreases as compare to the unbraced building
which indicates that the overall response of the
building decreases.
4. The displacement of the structure is generally
found be reduced by providing bracing frame
for supporting silo structure.
5. The braced system gives the economical
results compared to unbraced system in terms
of frequency and displacement.
REFERENCES
[1] Manish S. Takey "SEISMIC RESPONSE OF
STEEL BUILDING WITH LINEAR
BRACING SYSTEM (A Software Approach)"
International Journal of Electronics,
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[2] Nateghi .F and Yakhchalian .M, "Seismic
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[5] Hongyu Li "ANALYSIS OF STEEL SILO
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[6] Julien Richard "SEISMIC DESIGN AND
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[8] Syed Rehan" Study of Seismic and Wind
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Composite Building"International Journal of
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(IJEIT) Volume 3, Issue 12, June 2014.
[9] Fatih Bazman "STIFFENING OF THIN
CYLINDRICAL SILO SHELL AGAINST
BUCKLING LOADS" The 12th International
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[10] IS: 800 - 1984 - General Construction In Steel
- Code of Practice.
[11] IS: 875 (Part 3) - 1987: Code of Practice for
Design Loads (Other Than Earthquake) for
Buildings and Structures- Wind Loads.
[12] IS: 1893(part 1)-2002 - Criteria for earthquake
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