论文部分内容阅读
借助有限元分析软件,考虑核心混凝土在三轴状态下的非线性行为以及聚氯乙烯(PVC)管与核心混凝土的相互作用,建立聚氯乙烯(PVC)-纤维增强材料(FRP)管混凝土短柱轴压有限元模型。结果表明,PVC-FRP管明显提高了核心混凝土的延性,非线性有限元分析结果与试验结果吻合较好。在此基础上,利用建立的有限元模型,分析在加载过程中核心混凝土、PVC管和FRP条带内力变化规律,探讨混凝土强度等级、FRP条带层数、PVC管厚度、FRP条带宽度等因素对PVC-FRP管混凝土短柱应力-应变关系的影响规律。
Using finite element analysis software, considering the nonlinear behavior of core concrete in the triaxial state and the interaction of polyvinyl chloride (PVC) pipes with core concrete, the establishment of polyvinyl chloride (PVC)-fiber reinforced material (FRP) pipe concrete short Column axial compression finite element model. The results show that the PVC-FRP tube significantly improves the ductility of the core concrete, and the nonlinear finite element analysis results are in good agreement with the experimental results. On this basis, using the established finite element model, the internal force of core concrete, PVC pipe and FRP strips during loading process was analyzed, and the concrete strength grade, FRP strip layer number, PVC pipe thickness, FRP strip width, etc. were discussed. Influence of factors on the stress-strain relationship of PVC-FRP pipe concrete short columns.