防屈曲支撑框架设计方法研究  

Research on design method of buckling restrained braced frames

作　　者：赵瑛[1] 郭彦林[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《建筑结构》2010年第1期38-43,85,共7页Building Structure

基　　金：教育部博士点基金资助项目(20060003045)

摘　　要：采用数值手段,研究了防屈曲支撑框架和普通中心支撑框架在性能上的差异。基于弹塑性时程分析,由大量防屈曲支撑框架算例,建立支撑框架结构在大震下的层间位移角最大值随抗侧刚度比k变化的关系曲线,按照大震不倒的要求,获得k值的合理取值范围。分别对不同k值下支撑框架结构的设计进行研究,得到相应k值下允许设计的最弱框架(即框架设计的临界点),供结构设计参考。The behavior differences of buckling restrained braces frames （BRBF） and concentrically braced frames （CBF） have been researched by numerical examples. Based on a large number of elasto-plastic time-history analysis of BRBF examples, the relationship between maximum story drift and lateral stiffness ratio k is established for BRBF subjected to large earthquakes, and according to current Chinese codes for structural design, a reasonable range of lateral stiffness ratio k is recommended. The weakest pure frames are achieved for different k values, which are the reference for preliminary design of BRBF.

关 键 词：防屈曲支撑 防屈曲支撑框架 中心支撑框架 抗侧刚度比 设计方法 

分 类 号：TU352.11[建筑科学—结构工程] O343.9[理学—固体力学]