FRP加固负载混凝土柱轴压性能有限元分析

采用有限元方法对不同负载应力水平下短期加载的纤维增强塑料(FRP)布约束混凝土柱轴压性能进行分析,并与已有试验结果做了比较。分析表明:选择合理的分析模型,可以较好地预测FRP布约束混凝土柱轴心受压性能。在此基础上,分析了不同带载应力水平下配筋率、混凝土强度、FRP约束刚度等参数对FRP约束混凝土柱承载力和变形的影响。

Finite element analysis of axial behavior of FRP-confined concrete columns with sustained load

The behavior of short-term axially preloaded concrete columns with FRP confinement under axial loading is simulated using finite element method, and the computing results are compared with the test ones.The comparisons show that proper analysis model can accurately simulate the axial compressive property of FRPconfined concrete columns. Then a parameter analysis is carried out to investigate the impact of longitudinal reinforcement ratio, volumetric lateral reinforcement ratio, concrete strength and restrain stiffness of FRP on the bearing capacity of columns and the load-strain curve under different preloading stress levels.