RC梁-CCFST柱加强环式节点抗剪承载力计算分析  

Calculation and Analysis of Shear Capacity of Connection with Stiffening Rings Between RC Beam and CCFST Column

作　　者：金怀印[1] 薛伟辰[1] 周德源[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《建筑科学与工程学报》2011年第2期106-113,共8页Journal of Architecture and Civil Engineering

摘　　要：对钢筋混凝土(RC)梁-圆形钢管混凝土(CCFST)柱节点核心区的抗剪机理进行了分析;基于商用软件ABAQUS,建立了综合考虑材料非线性、几何非线性以及接触非线性的有限元模型,在此基础上,对影响节点抗剪承载力的主要因素进行了参数分析,研究了轴压比、材料强度、核心区钢管壁厚、加劲肋及加强环等对节点抗剪承载力的影响;提出了RC梁-CCFST柱节点抗剪承载力的计算公式。研究结果表明:节点抗剪承载力主要由核心区混凝土、钢管及加劲肋承担,其中混凝土及钢管的相对贡献在95%左右;当轴压比从0增至0.26时,节点抗剪承载力提高近10%;节点抗剪承载力公式计算值与有限元分析结果吻合较好。The shear mechanism of panel zone of connection between reinforced concrete（RC） beam and circular concrete-filled steel tubular（CCFST） column was analyzed.The nonlinear finite element analysis models considering factors,such as material,geometrical and contact non-linearities were established by using the business software of ABAQUS.Then,parametric analyses were carried out to investigate the main influences of axial compression ratio,material strength of steel tube and concrete in the panel zone,thickness of steel tube,rib stiffeners and stiffening rings and so forth on shear capacity of the connection.The calculation formula of shear capacity of connection between RC beam and CCFST column was put forward.The study results show that the shear capacity of the connection is mainly contributed by the concrete,the steel tube and the rib stiffeners in the panel zone,and the relative contribution of the concrete and the steel tube is about 95%.The shear capacity of the connection approximately increases by 10% when axial compression ratio increases from 0 to 0.26.The calculation results by the formulae are in good agreement with the results by the finite element analysis.

关 键 词：圆形钢管混凝土柱 钢筋混凝土梁 加强环 抗剪承载力 有限元分析 

分 类 号：TU392.4[建筑科学—结构工程]