论文部分内容阅读
本文根据框架结构在加载过程中表现出来的塑性铰形成机理，介绍了一种用于钢筋混凝土框架非线性分析的简化单元模式。它考虑了轴力的二阶效应、横截面自开裂后的塑化和塑性区长度等非线性因素对结构的影响。此外，在分析中也考虑了钢筋锚固滑移和节点刚域的影响。经与试验结果比较，说明用本文模式对钢筋混凝土试验框架进行非线性有限元分析所得的计算结果是正确的。
In this paper, a simplified element model for nonlinear analysis of reinforced concrete frames is introduced based on the mechanism of plastic hinges formed during the loading process of frame structures. It considers the influence of nonlinear factors such as the second-order effect of axial force, the plasticizing and plastic zone length after cross-cracking, and the influence on the structure. In addition, the influence of the anchorage slip of the steel bar and the rigid region of the node is also considered in the analysis. Comparing with the experimental results, it is proved that the calculation results obtained by the nonlinear finite element analysis of the reinforced concrete test frame using this model are correct.