RC框架层间位移与构件变形关系研究  

Study on Relationship Between Story Drift and Element Deformation for RC Frames

作　　者：刘许凡[1] 蒋欢军[1,2] 

机构地区：[1]同济大学土木工程学院结构工程与防灾研究所,上海200092 [2]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《结构工程师》2012年第3期23-29,共7页Structural Engineers

基　　金：国家自然科学基金资助项目(51078272);科技部国家重点实验室基金资助课题(SLDRCE09-B-10)

摘　　要：为实现变形指标——层间位移角在RC框架结构基于性能的抗震设计中的应用,研究了层间位移与构件变形之间的关系。首先,介绍了RC框架层间位移构成。接着,在"强节点"的假定下,建立并验证了弹性状态下层间位移与构件变形的关系式;进入塑性阶段后,引入塑性折减系数,建立了塑性状态下层间位移与构件变形的转换关系式。最后,通过简化方法计算得到的层间位移与用OpenSEES数值模拟得到的结果进行对比分析,研究了塑性折减系数与延性系数的关系。The relationship between the element deformation and the inter-story drift was studied to realize the application of inter story drift in performance-based seismic design of RC frame structures. Firstly, the compo- sition of inter-story drift was introduced. Secondly, based on the assumption of strong joints and weak mem- bers, the relationship between the element deformation and the story drift in elastic state was established and verified. In plastic state, the plastic reduction factor was introduced to establish the relationship between the element deformation and the story drift. Finally, the relationship between the plastic reduction factor and the ductility factor was studied through comparison between the results obtained by the proposed method and those by Open SEES.

关 键 词：钢筋混凝土框架 层间位移 构件变形 弯矩-曲率关系 塑性折减系数 

分 类 号：TU375.4[建筑科学—结构工程]