FRP约束钢筋混凝土柱承载力非线性有限元分析

Nonlinear Finite Element Analysis of the Bearing Cap-acity of FRP Confined Reinforced Concrete Columns

借助有限元分析软件ABAQUS,通过建模合理选取材料本构关系、确定单元类型、界面处理以及网格划分的设置,建立FRP约束钢筋混凝土柱在轴心压力作用下的非线性有限元计算模型,得出各个阶段试件的承载能力。与试验结果进行比较,结果表明,有限元计算的极限承载力和荷载-挠度曲线与试验结果较好吻合,验证了有限元分析模型的适用性。

Using finite element analysis software ABAQUS, the nonlinear finite element calculation model of FRP confined reinforced concrete column under axial compression is estab-lished by means of modeling setting, constitutive relation selec-tion, element type determination, interface processing and net division. The bearing capacity of specimens is obtained in each stage, the conclusions comparing with the test result show that the finite element calculation conclusions of ultimate bearing ca-pacity and load -deflection curves agree well with the test re-sults, the applicability of the analysis model is verified.