基于简化拉压杆模型的钢筋混凝土框架异型节点抗剪性能研究  

Shear behavior of RC irregular interior joints using simplified softened strut-and-tie model

作　　者：刘鸣[1] 刘伯权[1] 邢国华[1] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061

出　　处：《地震工程与工程振动》2011年第2期63-67,共5页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51078037;50608004);教育部高校博士点基金项目(20100205110010);陕西省自然科学基金项目(2010JM7002)

摘　　要：在以往试验研究的基础上,建立了框架异型节点等效核心区在剪、压复合作用下的计算模型,应用简化拉压杆模型方法对等效核心区进行了受力分析。研究表明:基于简化拉压杆模型方法计算得到异型节点的抗剪承载力与现行规范建议方法计算结果相当,但简化拉压杆模型方法有明确的力学计算模型,基于该模型计算得到的抗剪承载力与试验结果吻合较好。在此基础上应用简化拉压杆模型方法就轴压力变化对异型节点受力性能的影响进行了初步分析。Based on the experimental study,an analytical model for equivalent joint core of frame joint under the combined action of axial load and shear is established,and the shear strength of equivalent joint core of tested specimens is calculated by using softened strut and tie model（STM）.Results indicate that the calculated shear strength of STM is quite nearly with that of code method,but STM has more definite mechanical model.Thus,full agreement between experimental results and prediction results of STM is reached.Based on the softened strut and tie model,the effect of axial compression ratio on seismic behavior of irregular interior joints is also discussed.

关 键 词：中节点 抗震性能 计算模型 拉压杆模型 简化计算 

分 类 号：P315.96[天文地球—地震学] TU375.4[天文地球—固体地球物理学]