多层钢框架性态抗震设计——屈服点谱法

Performance-based Seismic Design of Steel Moment Frames Using YPS

屈服点谱(Yield Point Spectra,YPS)是一种新的位移-加速度反应谱的表述形式。根据5条地震波构造了平均YPS谱,基于平均的YPS谱设计了1榀6层3跨的多层钢框架结构,采用Pushover方法和弹塑性时程分析方法对所设计的结构进行性态分析。结果表明,算例结构最终呈现理想的梁铰屈服机构,在罕遇地震作用下结构的层间侧移比满足现行抗震规范的要求,且结构延性满足目标性态要求。证明了基于YPS设计方法的可行性和合理性。

Yield Point Spectra is a new response to the displacement-acceleration format.A six-storey and three-span steel moment frame was designed based on the average YPS spectra with the five selected ground motions forming the spectra.The seismic behavior analysis of the design was made by the pushover method and nonlinear time history method.The analytical results showed the frames presented the ideal progressively plastic mechanism,the ratio of lateral movement between the stories could satisfy the deformation requirement of the seismic code under the rare earthquake,and the structural ductility could meet the performance.This new design method proved to be feasible and reliable.