论文部分内容阅读
介绍框架的非线性分析中,轴向-剪切-弯曲变形组合连接单元的损伤塑性模型。采用多面屈服理论定义单元。在变形空间中定义屈服面,并通过定义非矩形屈服面考虑轴向-剪切-弯曲变形的组合效应。该单元能考虑损伤和峰值后软化性能。用现有梁柱钢节点试验结果验证该单元分析结果,结果表明:分析结果与试验结果误差在可接受范围内。在考虑和不考虑损伤两种情况下,采用此单元对抗弯框架进行非线性动力分析,结果表明:是否考虑损伤对结果影响很大。在侧向荷载和重力的作用下,对考虑框架梁端的剪切和弯曲变形组合效应的影响进行研究。结果表明:当塑性变形很小时,剪切-弯曲组合效应可忽略;塑性变形接近极限时,组合效应的影响很大。
In the non-linear analysis of the frame, the damage plastic model of the combined axial-shear-bending deformation element is introduced. The unit is defined by the multi-face yield theory. Define the yield surface in the deformation space and consider the combined effect of axial-shear-bending deformation by defining the non-rectangular yield surface. The unit can account for damage and post-peak softening performance. The experimental results of the existing beam-column steel joints are used to verify the results of the unit analysis. The results show that the error between the analytical results and the experimental results is within the acceptable range. Considering and not considering the two cases of damage, this unit is used to analyze the nonlinear dynamic analysis of flexural frame. The results show that whether the damage is considered greatly affects the result. Under the action of lateral load and gravity, the influence of the combined effect of shear and bending deformation on the frame beam end is studied. The results show that when the plastic deformation is small, the shear-bending combination effect can be neglected. When the plastic deformation approaches the limit, the combination effect has a great influence.