水平地震作用下半刚性端板式连接钢结构住宅的动态响应与破坏模式的数值分析

摘要

半刚性连接钢结构有着诸多的优越性,对其抗震性能的研究是关注的话题之一.本文采用基于纤维铰模型的增量动力时程分析方法,对水平地震作用下的某刚接、半刚接算例的抗震性能进行对比,结果表明,在水平地震作用下,半刚接框架比刚接框架的顶点位移、基底剪力小;两种结构最大层间位移的变化存在明显差异,且半刚接框架层间位移的变化范围比刚接框架的大;半剐性连接框架比刚接框架提前进入耗能阶段,连接的柔性使结构更容易形成“强柱弱梁”的抗震设计要求.%Steel buildings with semi-rigid connections have many advantages, the seismic behavior of this kind of structural system is one of topics people concerned. Using incremental dynamic analysis based on fiber hinge model to contrast the seismic resistance performance of practical application with semi-rigid,rigid connections,the computation results prove that the seismic vertex displacement and base shear response of semi-rigid steel frame is less than rigid steel frame. The biggest interlayer displacement with differences between the above-mentioned two kinds of structures, and the range of the interlayer displacement of semi-rigid steel frame is large. The displacement time history records of same point with differences between the two kinds of structures. Semi-rigid steel frame entered the energy dissipation step earlier than rigid steel frame, and the flexibility of connection made structure easier to access with " strong column weak beam".