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Fragility functions for code complying RC frames via best correlated IM-EDP pairs

机译:通过最佳关联的IM-EDP对实现符合代码的RC帧的易碎性功能

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This paper provides an investigation on the correlations between ground motion intensity measures (IMs) and engineering demand parameters (EDPs) through nonlinear dynamic analyses of MDOF systems under real earthquake recordings and then structural fragility curves are derived for the best correlated IM-EDP pairs. For this purpose, a parametric study on reinforced concrete (RC) buildings is carried out. Study buildings comprise 5-, 10-, 15- and 20-story, RC, code-complying, regular, moment-resisting frames designed for different strength reduction factors, e.g. R = 2, 4 and 6. The input ground motion dataset consists of 734 horizontal components of earthquake accelerograms. The best correlations between IMs and EDPs are computed by regression analysis. Sets of fragility curves in terms of maximum inter-story drift ratio, maximum plastic end rotation and maximum floor acceleration are derived based on log-normal distribution assumption. Fragility curves are presented not for a specific damage state such as slight, moderate etc. but for a range of damage thresholds on EDP.
机译:本文通过在真实地震记录下对MDOF系统进行非线性动力学分析,研究了地面运动强度测度(IMs)与工程需求参数(EDPs)之间的相关性,然后得出了最佳相关IM-EDP对的结构脆性曲线。为此,对钢筋混凝土(RC)建筑物进行了参数研究。研究大楼包括5层,10层,15层和20层的RC,符合代码,规则的抗弯框架,设计用于不同的强度折减系数,例如R = 2、4和6。输入的地面运动数据集由734个地震加速度图的水平分量组成。 IM和EDP之间的最佳相关性通过回归分析来计算。基于对数正态分布假设,得出了关于最大层间飘移率,最大塑料端旋转和最大地板加速度的一组脆性曲线。脆弱性曲线不是针对特定的损坏状态(例如轻微,中度等),而是针对EDP上的一系列损坏阈值。

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