Effect of Seismicity on the Seismic Resilience of a R.C. Building

IF 0.8 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2022-12-24 DOI:10.1007/s40010-022-00803-x

S. Prasanth, Goutam Ghosh

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Abstract

This study was carried out to evaluate the functionality of an existing reinforced concrete structure under various ground motions along with its seismic resilience. An existing high-rise G + 10 storey reinforced concrete building which was designed for a specific ground motion with peak ground acceleration (PGA) of 0.36 g was subjected to various seismicity with respect to different ground motions of PGA ranges from 0.10 to 1.70 g. For each case, the performance level and structural damage ratio were estimated by performing nonlinear static pushover analysis. The influences of different ground motions on the structural functionality and seismic resilience were examined using three recovery functions namely, linear, trigonometric and exponential. The result shows that the maximum number of hinges formed with the performance level close to or just exceeding the level of collapse prevention at the maximum considered PGA of 1.50 g and 1.70 g with loss of resilience up to 36.25%. The maximum level of PGA that the existing building would withstand along with likelihood of recovery has been obtained.

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地震活动性对钢筋混凝土建筑抗震性能的影响

本研究旨在评估现有钢筋混凝土结构在各种地面运动下的功能及其抗震能力。某现有高层G + 10层钢筋混凝土建筑，在峰值地面加速度(PGA)为0.36 G的特定地震动条件下，对PGA在0.10 ~ 1.70 G范围内的不同地震动进行了不同的地震活动性试验。在每种情况下，通过进行非线性静力推覆分析来估计其性能水平和结构损伤比。采用线性、三角和指数三种恢复函数考察了不同地震动对结构功能和抗震弹性的影响。结果表明:在最大考虑PGA为1.50 g和1.70 g时，性能水平接近或刚刚超过防塌水平的铰链的最大成形数，回弹损失达36.25%;现有建筑可以承受的最大PGA水平以及恢复的可能性已经获得。

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