A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Enhancement of Lateral Stability of High-Rise Structures Adopting Effective Lateral Load Resisting Systems
There is a necessity in design to ensure high-rise structures are structurally stable to resist lateral loads that originate due to earthquakes or wind so as to avoid catastrophic failure. This work aims at enhancing the lateral stability of high-rise structures having asymmetry in plan along with variation in lateral stiffness at different floor levels, by adopting an effective lateral load resisting system. In the present work, two high-rise structures having 60 storeys each with different shapes in plan have been considered as a case study. One of the high-rise structures has irregularity in plan, and the other has symmetry in plan. Both high-rise structures considered have different storey heights at certain floor levels leading towards variation in lateral stiffness of the structures at the respective floor levels. A nonlinear seismic (response spectrum) and wind analysis has been carried out on both high-rise structures considered for the study. The maximum storey displacement, storey stiffnesses, storey shear for different load combinations of gravity loads (dead and live loads), along with earthquake and wind loads applied individually, are recorded for both high-rise structures. Both the high-rise structures considered in this study are located in zone V, and a maximum wind speed of 50 m/s is considered for wind pressure calculations. The results showed that the maximum storey displacements for both high-rise structures having different shapes in plan subjected to earthquake and wind loads were comparatively high. It is observed that the lateral displacements were found to be higher in the high-rise structure that has asymmetry in plan when compared to the structure having symmetry in plan. Three different lateral load resisting systems have been applied individually, on both high-rise structures whilst carrying out the earthquake and wind analysis separately, to assess the performance of the individual lateral load resisting systems. The three different lateral load resisting systems considered in the analyses are steel bracings, diagrids and shear walls. Two types of steel bracings: X and V bracings have been applied individually on both high-rise structures whilst carrying out the analyses. Combinations of the lateral load resisting systems have been applied on both high-rise structures having different shapes in plan, subjected to earthquake and wind so as to arrive at an effective combination of the lateral load resisting system, when applied enhances the lateral stability and reduces the lateral storey displacements of the high-rise structures having plan and storey stiffness irregularity.
Enhancement of Lateral Stability of High-Rise Structures Adopting Effective Lateral Load Resisting Systems
There is a necessity in design to ensure high-rise structures are structurally stable to resist lateral loads that originate due to earthquakes or wind so as to avoid catastrophic failure. This work aims at enhancing the lateral stability of high-rise structures having asymmetry in plan along with variation in lateral stiffness at different floor levels, by adopting an effective lateral load resisting system. In the present work, two high-rise structures having 60 storeys each with different shapes in plan have been considered as a case study. One of the high-rise structures has irregularity in plan, and the other has symmetry in plan. Both high-rise structures considered have different storey heights at certain floor levels leading towards variation in lateral stiffness of the structures at the respective floor levels. A nonlinear seismic (response spectrum) and wind analysis has been carried out on both high-rise structures considered for the study. The maximum storey displacement, storey stiffnesses, storey shear for different load combinations of gravity loads (dead and live loads), along with earthquake and wind loads applied individually, are recorded for both high-rise structures. Both the high-rise structures considered in this study are located in zone V, and a maximum wind speed of 50 m/s is considered for wind pressure calculations. The results showed that the maximum storey displacements for both high-rise structures having different shapes in plan subjected to earthquake and wind loads were comparatively high. It is observed that the lateral displacements were found to be higher in the high-rise structure that has asymmetry in plan when compared to the structure having symmetry in plan. Three different lateral load resisting systems have been applied individually, on both high-rise structures whilst carrying out the earthquake and wind analysis separately, to assess the performance of the individual lateral load resisting systems. The three different lateral load resisting systems considered in the analyses are steel bracings, diagrids and shear walls. Two types of steel bracings: X and V bracings have been applied individually on both high-rise structures whilst carrying out the analyses. Combinations of the lateral load resisting systems have been applied on both high-rise structures having different shapes in plan, subjected to earthquake and wind so as to arrive at an effective combination of the lateral load resisting system, when applied enhances the lateral stability and reduces the lateral storey displacements of the high-rise structures having plan and storey stiffness irregularity.
Enhancement of Lateral Stability of High-Rise Structures Adopting Effective Lateral Load Resisting Systems
Lecture Notes in Civil Engineering
Saha, Suman (editor) / Sajith, A. S. (editor) / Sahoo, Dipti Ranjan (editor) / Sarkar, Pradip (editor) / Meghashree, L. (author) / Guruprasad, Y. K. (author)
2022-10-05
13 pages
Article/Chapter (Book)
Electronic Resource
English
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