施工缝模型及在钢筋混凝土柱非线性分析中的应用  

Construction Joint Modeling and its Application in Nonlinear Analysis of RC Columns

作　　者：李英民[1,2] 于婧[1] 夏洪流[1,2] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045

出　　处：《土木建筑与环境工程》2011年第5期1-6,共6页Journal of Civil,Architectural & Environment Engineering

基　　金：重庆市科技攻关项目(CSTC;2010AB0007);国家自然科学基金资助项目(90815011)

摘　　要：提出用零长度截面单元模拟施工缝,并基于纤维模型推导了单元刚度矩阵,给出完整的单元描述。在此基础上,进一步提出用以模拟带缝柱的纤维杆元模型,即由一个非线性梁柱子单元端部附加零长截面子单元组成。通过OPENSEES非线性分析软件平台,建模分析了钢筋混凝土带缝柱在拟静力试验下的非线性反应行为,计算结果与试验结果吻合较好,验证了该模型的有效性,为以后在混凝土结构或构件的非线性分析中考虑施工缝的影响提供依据。A zero-length-section element is proposed to model the construction joint. Based on fiber model theory, the qualitative description and the stiffness matrix of zero-length-section element are listed. Furthermore, a fiber line element model is derived which is constructed by a zero-length-section element at the end of a nonlinear beam-column element. Investigation of the static nonlinear responses of a cantilever column with construction joint by finite element procedure OPENSEES is played. It is shown that the model proposed here is reasonable and efficient in the nonlinear numerical analysis of reinforced concrete members with construction joint.

关 键 词：施工缝 零长度截面单元 钢筋混凝土带缝柱 纤维杆元模型 非线性分析 

分 类 号：TU375[建筑科学—结构工程]