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本文基于有限元软件ABAQUS对圆钢管混凝土压弯剪构件力学性能进行研究,通过对以往试验结果的模拟对比验证了模型的合理性,并对典型构件受力全过程荷载-位移曲线、构件破坏形态、荷载分配、应力分布和界限剪跨比进行了研究。研究结果表明:典型构件的荷载-位移曲线大致分为弹性阶段、弹塑性阶段和塑性阶段;根据剪跨比的不同可将构件的破坏形式分为压剪、压弯剪和压弯;轴压比的改变对荷载分配曲线的形状有较大影响;剪跨比、轴压比、含钢率、钢材强度及混凝土强度对构件抗剪承载力和弹性阶段刚度都有不同程度的影响。
In this paper, based on the finite element software ABAQUS, the mechanical properties of concrete-filled circular-tube concrete compression-bending shear members are studied. The rationality of the model is verified through the simulation of the previous test results. The load-displacement curves, , Load distribution, stress distribution and shear-span ratio were studied. The results show that the load-displacement curves of typical components can be divided into elastic phase, elastic-plastic phase and plastic phase. According to the different shear-span ratio, the failure modes of the components can be divided into compression shear, The change of ratio has a greater influence on the shape of load distribution curve. The shear span ratio, axial compression ratio, steel content, steel strength and concrete strength have different influences on the shear strength and the elastic stiffness of the member.