近场地震下框架剪力墙高层结构地震易损性分析

结合已有的研究成果，总结近场地震动的主要特点；根据中国规范给出结构4个性能水平定义及相应的量化指标限值；根据断层距等因素选取近场、远场各20条地震波并对地震波记录进行调幅。考虑地震波的不确定性，对2栋不同高度框架剪力墙结构进行地震易损性分析，得到相应的地震易损性曲线，并对两结构的抗震性能进行对比。结果表明:20层结构的层间位移地震动需求大于30层结构；近场地震波将引起结构损伤且大于远场地震波。

Seismic Fragility Analysis of Frame-wall High-rise Structures Under Near-fault Ground Motions

A comparative study was carried out to examine the seismic behavior of high-rise frame-wall structures subjected to far-fault and near-fault earthquakes. Four performance levels and corresponding quantitative damage states were defined according to the Chinese code. Two ground motion bins consisting of 20 records each were generated and classified as far-fault and near-fault motions based on distance to fault rupture. Considering the randomness of input ground motions, seismic fragility analysis was carried out on two frame-wall structures with different heights, and the relative seismic fragility curve was given. The relative seismic performance of the two structures designed according to the Chinese code was compared. The results show that the 20-story structure is likely to experience higher interstory drifts than the 30-story structure and that near-fault ground motions are more damaging than far-fault ground motions.