(大连理工大学工程力学系工业装备结构分析国家重点实验室  116024)
【提要】  考虑钢框架结构的地震作用、结构构件面积、材料弹性模量、屈服强度、恒荷载和活荷载的随机性,对结构进行不同水平加载模式下的静力弹塑性(Pushover)分析,采用概率统计理论中的KS检验法,对最大层间变形概率分布进行了分析。结果表明,在给定地震烈度下基于Pushover分析的钢框架最大层间变形服从极值Ⅱ型分布,而且不同水平加载模式对统计参数有一定的影响。
【关键词】  钢结构  Pushover分析  抗震设计  概率分布  KS检验
Statistical Properties of Maximum Story Drift of Seismic Steel Frames by Pushover Analysis/Li Gang(Department of Engineering Mechanics,State Key Laboratory of Structural Analysis of Industrial Equipment,Dalian University of Technology,Dalian 116024,China)
Abstract:The concept of performance based on seismic design has been recommended as one of the nonlinear analysis methods in the new Chinese seismic design code.The statistical properties of the maximum story drift of seismic steel frames  are presented by Pushover analysis using the KS test,considering the randomness of earthquake load,dead load,live load,steel elastic module, steel yield strength and structural member imensions.The results show that the probability distribution of the maximum story drift has the probability distribution of extreme value type Ⅱ,and different selection of lateral load pattern in Pushover analysis has some influence on their statistical parameters.
Keywords:steel structure; Pushover analysis; aseismic design; probability distributions; KS test