交错桁架多层钢结构推倒分析方法研究  

Study on pushover analysis method for multi-story staggered steel truss structures

作　　者：尹越[1] 李顺[1] 白林佳[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《地震工程与工程振动》2008年第3期52-57,共6页Earthquake Engineering and Engineering Dynamics

摘　　要：随着基于性能的抗震设计思想的发展,推倒分析开始成为罕遇地震下多、高层结构抗震设计的有力工具。本文以交错桁架多层钢结构为例,采用推倒分析对其在E l Centro波作用下的地震反应进行研究,分别采用位移系数法和能力谱法确定结构目标位移,同时进行结构在相同地震动下的弹塑性时程分析。研究表明,推倒分析能准确地评价交错桁架多层钢结构的抗震性能,采用位移系数法和能力谱法确定的结构顶点侧移均与弹塑性时程分析吻合较好,对层间位移及塑性铰分布的预测,能力谱法比位移系数法更为准确。With the development of performance-based seismic design method, pushover analysis began to be an effective tool for seismic design of high-rise buildings under severe earthquakes. In this paper, a multi-story staggered steel truss structure was taken as a case study. Pushover analysis was adopted for the study of its seismic behavior under El Centro earthquake record. Target displacement was determined with both displacement coefficient method and capacity spectrum method. Nonlinear time history analysis was conducted for comparison. It was shown that the seismic behaviour of multi-story staggered steel truss structures can be evaluated accurately by the pushover analysis method. The maximum lateral displacements determined with both displacement coefficient method and capacity spectrum method agree well with the nonlinear time history analysis. For interstory drift and plastic hinge distribution, capacity spectrum method achieves more accurate results than the displacement coefficient method.

关 键 词：推倒分析 位移系数法 能力谱法 弹塑性时程分析 交错桁架多层钢结构 

分 类 号：TU313.3[建筑科学—结构工程] P315.9[天文地球—地震学]