基于MCFT理论的RC框架节点受剪性能研究  

Shear behavior of reinforced concrete frame joints using modified compression field theory

作　　者：刘鸣[1] 邢国华[1] 吴涛[1] 刘伯权[1] 

机构地区：[1]长安大学,陕西西安710061

出　　处：《土木工程学报》2011年第2期82-89,共8页China Civil Engineering Journal

基　　金：国家自然科学基金(50608004;51078037);教育部高校博士点基金(20060710004;20100205110010)

摘　　要：根据10个梁高不等的钢筋混凝土框架中节点试件在低周反复荷载作用下的试验结果,重点分析该类框架节点的破坏过程和破坏特点。在试验研究的基础上,建立框架节点等效核心区在剪、压复合作用下的计算模型,应用改进斜压场理论(MCFT)对等效核心区进行受力分析,并通过国内外83个无扭矩作用框架节点试件(包括常规中节点、边节点、变梁中节点等)峰值剪应力的试验结果与该模型计算得到的理论结果进行对比,二者吻合良好。Ten specimens of interior joints with different depth beams were tested under reversed cyclic loading.The failure characteristics and failure process of the interior joints are analyzed.Based on the experimental study,an analytical model for equivalent joint core of the frame joint under the combined action of axial load and shear is established,and the shear stress vs.shear angle curves of equivalent joint core of the specimens were calculated by using modified compression field theory（MCFT）.The proposed analytical model was verified using 83 sets of test data of beam-column joints without torsion（including ordinary interior joints,exterior joints,and joints with different depth beams）.Good agreement between experimental results and prediction results is achieved.

关 键 词：节点 抗剪性能 计算模型 改进斜压场理论 

分 类 号：TU375.4[建筑科学—结构工程]