HPFRC耗能墙-RC框架结构地震易损性分析

Seismic Fragility Analysis of HPFRC Energy Dissipation Wall-RC Frame Structure

采用Perform-3D结构分析软件,选取44条地震动记录,对高性能纤维增强混凝土(HPFRC)耗能墙-钢筋混凝土(RC)框架结构进行基于增量动力分析方法(IDA)的地震易损性分析.结果表明:HPFRC材料良好的受拉应变硬化性能,可以改善结构或构件的耐损伤能力和耗能能力,进而提高整体结构的抗震性能;结构发生倒塌时,由44条地震波计算出的对应于结构基本周期的反应谱加速度平均值大于8度设防烈度对应的罕遇地震作用下结构基本周期所对应的谱加速度值,说明HPFRC耗能墙-RC框架结构具有良好的抗倒塌能力;在8度设防烈度对应的罕遇地震作用下,HPFRC耗能墙-RC框架结构发生倒塌的超越概率为0.03%,满足大震作用下结构的抗震设防要求.

Based on the incremental dynamic analysis(IDA) method,the seismic fragility analysis of high performance fiber reinforced concrete(HPFRC)energy dissipation wall-reinforced concrete(RC)frame structure was carried out by using Perform-3D structural analysis software and 44 seismic records. The results show that the HPFRC material has good tensile strain hardening performance,which can improve the damage resistance and energy dissipation capacity of the structure,and then improve the seismic performance of the whole structure;when the structure collapses,the average response spectral acceleration corresponding to the basic period of the structure calculated by 44 seismic waves is greater than the spectral acceleration corresponding to the basic period of the structure under the rare earthquake with 8 degree fortification intensity,it means that the HPFRC energy dissipation wall-RC frame structure has good anti-collapse ability;under the action of 8 degree rare earthquake,the probability of exceeding collapse of the HPFRC energy dissipation wall-RC frame structure is 0.03%,which meets the requirements of seismic protection of the structure under large earthquake.