某超限塔楼基于IDA的地震易损性分析  

Seismic Fragility Analysis of an Office Building Based on IDA

作　　者：张朕磊 ZHANG Zhenlei(Institute of Structural Engineering and Disaster Reduction,Tongji University,Shanghai 200092,Chin)

机构地区：[1]同济大学结构工程与防灾研究所,上海200092

出　　处：《结构工程师》2018年第3期16-23,共8页Structural Engineers

摘　　要：随着抗震性能化设计思想的推广、计算机性能的显著提高以及有限元分析计算软件的研发,使增量动力分析法逐渐受到广大设计人员的关注和使用。通过对广西柳州某超限高层塔楼进行单向水平地震作用下的IDA分析,得到多条地震记录下的结构反应IDA曲线和结构性能点,统计出16%、50%、84%比例的IDA曲线。同时结合地震易损性理论,明确了基于IDA的地震易损性分析的步骤;通过计算结构在各指定水准下超越极限状态的概率,建立该塔楼的地震易损性曲线和地震易损性矩阵,对该塔楼的抗震性能作出评估。可供日后其余工程超限分析作参考。With the popularization of the performance-based seismic design,the significant improvement of computer property and the development of finite element analysis software,engineers pay more attention to the incremental dynamic analysis and take more use of it. The IDA analysis of a high-rise building in Liuzhou,Guangxi is carried out under horizontal earthquake action in one direction. Structural response IDA curves and structural performance points of several earthquake waves are obtained,and the author makes the statistics of16%,50% and 84% IDA curves. At the same time,the procedure of seismic vulnerability analysis based on IDA is clarified combining with the seismic fragility theory. By calculating the probability of the structure exceeding the limit state at the specified level,the seismic fragility curves and seismic vulnerability matrix are established,and seismic behavior of this building is evaluated. The methods and results are provided to analyze tall buildings beyond the scope of design codes for reference in future.

关 键 词：增量动力分析 地震易损性分析 结构失效概率 

分 类 号：TU973.31[建筑科学—结构工程]