基于IDA的异形柱框架剪力墙地震易损性分析

Seismic fragility analysis of frame-shear wall with special-shaped column based on IDA

基于IDA的异形柱框架剪力墙地震易损性分析是一种从概率角度定量评估此类结构抗震性能的方法。文章定义了适用于该类结构的极限状态,借助非线性分析软件PERFORM-3D,对1栋11层异形柱框剪结构进行了不同强度地震下的性能评估,并使用性能设计软件PBSD统计了罕遇地震下结构关键构件的损坏等级及位置。结果表明:7度设防下,结构小震不坏、中震可修、大震不倒的概率分别为78.71%、93.98%、83.96%;罕遇地震作用下构件的损坏等级以轻微损坏及轻度损坏为主,其损伤主要集中在梁上,抗震性能良好。

IDA-based seismic fragility of frame-shear wall with special-shaped column is a method to quantitatively evaluate the seismic performance of such structure from the probabilistic of perspective.This paper defines the limit state applicable to this type of structure,with the help of the nonlinear analysis software PERFORM-3D,the above method was used to evaluate the performance of an eleven-story frame-shear structure with special-shaped column under different strength earthquakes,and performance design software PBSD was used to calculate counts the damage levels and locations of key structural members under rare earthquakes.The results show that under the 7-degree fortification,the probability that the structure perfect subjected to minor earthquake,reparable subjected to moderate earthquake,no collapse subjected to unexpected major earthquake is 78.71%,93.98%,and 83.96%,respectively;the mainly damage level of components under rare earthquakes is slightly damaged and mildiy damaged,the damage is mainly concentrated on the beam,and the seismic performance is good.