钢框架结构直接基于位移的抗震设计方法研究  

Directly displacement-based seismic design method of steel frames

作　　者：熊二刚[1] 梁兴文[2] 张倩[3] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]西安建筑科技大学土木工程学院,陕西西安710055 [3]西安欧亚学院建筑工程学院,陕西西安710065

出　　处：《地震工程与工程振动》2011年第4期106-113,共8页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50678146);陕西省自然科学基金项目(2010JQ7006);中国博士后科学基金项目(20100481313)

摘　　要：将钢框架结构按其性能划分为使用良好、人身安全、防止倒塌三个水平,并用层间侧移角予以量化;采用钢框架的最大层侧移模式来确定其目标侧移曲线;在等效线性化的前提下,由等效位移用弹性位移反应谱求出等效周期,然后对构件进行刚度设计和承载力设计;用静力弹塑性分析方法对结构进行分析,校核其实际侧移曲线与满足性能目标的侧移曲线是否一致。采用此方法对一五层钢框架结构进行了分析。分析结果表明,该法简单实用,便于操作,且能控制结构在不同水准地震作用下的性能。最后采用动力时程分析法验证了该方法的可行性,为钢框架结构直接基于位移的抗震设计提供了一定的依据。According to the characteristic of steel frames,their seismic performance which is closely related to their profiles can be divided into three levels： serviceability,life-safety and collapse protection,each of which can be quantified by the interstory drift ratio.In this study,the target story drift curve is determined by the maximum story displacement profile proposed in document.On the basis of equivalent linearization,the effective period is obtained with the effective displacement using the elastic displacement spectrum.Then the stiffness and capacity design of members is achieved.The structure is analyzed by the nonlinear static analysis procedure,and the agreement of its actual drift curve with the drift curve satisfying the performance objective is checked.This method is applied to the design of a five-storey steel frame.It is demonstrated that this method is easily utilized and can realize the control over the performance of the structure under different levels of earthquake.Finally,the dynamic time history analysis is employed to validate this addressed method,which forms a basis for the direct displacement-based seismic design of steel frames.

关 键 词：钢框架 直接基于位移的抗震设计 侧移模式 层间侧移比 动力时程分析 

分 类 号：P315.952[天文地球—地震学] TU375[天文地球—固体地球物理学]