Effect of Backstay on 3B+G+20 Storey RC Building
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Aug-20
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Conference Paper
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The scope of this project was to study the integrated modelling technique for a real time 3B+G+20 storey building having tower and below grade podium to have a realistic prediction of its behavior under Earthquake loads. Influence of below grade podium having comparatively large area and lateral stiffness than above tower, on Lateral load distribution, behavior, performance and design philosophy of lateral load resisting system including floor diaphragms at the intersections of below grade podium and towers were studied. A set of Backstay Sensitivity Analysis was performed on the structure to understand the behavior and changes in the force distribution among various structural elements when tower and podium are modelled together. Influence of the Overturning resistance provided by the back-stay effect on the behavior and performance of tower lateral load resisting system was critically compared and analyzed with building without such effect. Effect of cutout in the podium diaphragms on back stay effect and force as well stress distribution in diaphragm were also studied.
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Faculty of Technology
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Backstay effect, Below grade podium, Sensitivity analysis, Diaphragms, Shear Reversals
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OTHER
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National Conference on Structural Engineering NCRASE 2020