摘要
基于位移的抗震设计方法是结构基于性能化抗震设计的重要方法之一,它可直观反映结构的具体性能目标。在基于位移的抗震设计中如何确定框架的层间位移与构件变形之间的关系至关重要。本文用典型框架节来等效该层框架,将框架层间位移转化为框架节的侧移,通过引入塑性变形分布因子λp的概念,建立了λp与位移延性系数μδ、强柱系数ηc之间的关系,即λp-μδ-ηc关系,得出框架节的侧移分布规则,从而求解钢管混凝土框架的弹塑性层间位移,为该类结构基于位移的抗震设计中位移的计算提供了参考。
The theory of displacement-based seismic design（PBSD） is key issue in the modern earthquake engineering research.It can present the specific performance objective of the structure.It is important to define the relations between the elastic-plastic inter-story drift of frame and the deformation of members.The story drift can be represented by the drift of a typical beam/column sub-assemblage in this paper.With the plastic deformation influence factor λp as a parameter,the relations among λp,displacement ductility ratio μδ,and column overstrength factor ηc,namely λp-μδ-ηcequations,are presented.Furthermore,the rules of drift decomposition are developed so that elastic-plastic story drift of CFST frame can be gained.It can provide reference to displacement calculation of the CFST structure in the displacement-based seismic design.
出处
《工程抗震与加固改造》
北大核心
2011年第4期17-23,共7页
Earthquake Resistant Engineering and Retrofitting
基金
甘肃省高等学校基本科研业务费专项(0904ZTB147)
关键词
钢管混凝土框架
弹塑性层间位移
框架节
位移组成
塑性分布因子
concrete-filled steel tubular（CFST） frame
elastic-plastic story drift
beam/column sub-assemblage
displacement component
plastic influence factor
作者简介
王文达（1976-），男，甘肃清水人，博士，副教授，硕士生导师，主要从事组合结构及结构抗火研究
