装配式可更换混凝土框架节点非线性分析
摘要：对可更换新型混凝土框架梁柱节点的抗震性能进行仿真研究,采用有限元软件ABAQUS对节点进行非线性有限元分析,介绍了混凝土和钢结构的本构模型、混凝土与混凝土界面特性、混凝土与钢结构之间的黏结特性。将有限元计算结果与试验数据进行对比,发现数值模拟结果与试验数据吻合良好。基于所建立的有限元模型对节点进行参数化分析,结果表明混凝土与混凝土之间的界面状态对可更换装配式节点整体承载力的影响非常有限,但会影响连接处的开裂方式和延性。
关键词：装配式框架节点数值模拟力学性能
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[2] ZHANG L,TENG J G.Finite element prediction of interfacial stresses in structural members bonded with a thin plate[J].Engineering structures,2009,32(2):459-471．
[3] 聂建国,王宇航．ABAQUS中混凝土本构模型用于模拟结构静力行为的比较研究[J]．工程力学,2013,30(4):59-67,82．
[4] GEORGIA D,KREMMYDA,YASIN M,et al.Nonlinear FEanalysis of precast RC pinned beam-to-column connections under monotonic and cyclic shear loading[J].Bulletin of earthquake engineering,2014,12(4):1615-1638.
Nonlinear Analysis of Joints in Prefabricated Replaceable Concrete Frame
Abstract: The seismic performance of a new replaceable concrete frame beam-column joint is simulated,and the finite element software ABAQUS is used to conduct a nonlinear finite element analysis of the joint. The constitutive model of concrete and steel structure,the characteristics of concrete and concrete interface,the characteristics of bonding between concrete and steel structure are introduced. The finite element calculation results are compared with the experimental data,and it is found that the numerical simulation results are in good agreement with the experimental data. Based on the established finite element model,a parametric analysis of the joint is carried out. The results show that the interface state between concrete and concrete has a very limited influence on the overall bearing capacity of the replaceable fabricated joint,but it will affect the cracking mode and ductility of the joint.
Keywords: prefabricated; frame; joints; simulation; methanical properties
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