圆CFRP钢管混凝土外加强环节点有限元分析  

Finite element analysis of joint with outside reinforced ring of concrete filled circular CFRP steel tube

作　　者：魏华[1] 许博[1] 

机构地区：[1]沈阳工业大学建筑与土木工程学院,沈阳110870

出　　处：《沈阳工业大学学报》2016年第3期355-360,共6页Journal of Shenyang University of Technology

基　　金：沈阳市科技计划项目(F13-316-1-43)

摘　　要：为了深入研究圆CFRP钢管混凝土外加强环节点的力学性能,使用有限元软件ABAQUS分析了混凝土强度、钢材强度、轴压比、加强环板的厚度和加固形式对节点力学性能的影响.对节点模型进行了低周往复荷载下数值模拟.结果表明,当混凝土和钢材强度不变时,随着轴压比的增加,外加强环节点的承载力保持不变;加强环板厚度对节点承载力影响较大,随着加强环板厚度的增加,节点的承载力明显增加,当厚度增加到一个限值时,承载力基本保持不变;加强板和加强筋加固形式可以显著提高节点的刚度,使钢梁先于柱屈服,实现强节点弱构件的抗震目标.In order to further study the mechanical properties of joint with outside reinforced ring of concrete filled circular CFRP steel tube, the effect of concrete strength, steel strength, axial compression ratio, thickness of reinforced ring plate and reinforcement forms on the mechanical properties of joint was analyzed with the finite element software ABAQUS. The numerical simulation for the joint model was performed under the action of low-cycle repeated loads. The results show that when the concrete strength and steel strength are constant, the bearing capacity of joint with outside reinforced ring keeps unchanged with increasing the axial compression ratio. The effect of thickness of reinforced ring plate on the bearing capacity of joint is large. With increasing the thickness of reinforced ring plate, the hearing capacity of joint obviously increases. However, when the thickness of reinforced ring plate increases to a certain limit value, the bearing capacity keeps basically unchanged. The reinforcement forms with reinforced plate and rib can obviously improve the stiffness of joint, and make the failure of steel beam ahead of that of joint, which can realize the seismic target of strong joint and week member.

关 键 词：钢管混凝土 外加强环节点 有限元 钢材强度 混凝土强度 轴压比 承载力 强节点弱构件 

分 类 号：TU398.9[建筑科学—结构工程]