基于能力谱法的钢框架抗震性能评估

摘要

The paper describes the basic principle and technical route of the capacity spetrum method.Combined with Chinese seismic code,using the capacity spetrum method to analysis a 9-story steel building by the SAP2000 finite element software.Find out the law of steel pushover curve under the change of column stiffness.The result shows that the capacity spetrum method is an effective method to assess the performance and structural behavior of the structure under the sesimic action,which disigner can choose appropriate member by the capacity spetrum method to meet the need of engineering.%介绍了能力谱法基本原理与技术路线,结合我国地震烈度设防规定,采用SAP2000有限元程序,针对一个9层钢框架结构,利用能力谱法进行了分析,得到了结构的层间信息以及塑性铰发展机制,并研究了钢框架静力推覆曲线和性能点随框架柱刚度变化的规律.结果表明,随着梁,柱刚度的增加,结构在强震作用下的对应性能点的基底剪力增大,顶点位移减小,说明结构能力谱法是结构抗震性能分析的有效方法,设计人员可以依据能力谱法评估结果调整构件来满足工程抗震需要.