钢筋混凝土梁的非线性有限元分析

• 作 者: 狄生林
• 出 处: 南京工学院学报
• 发表日期: 1984年02期
• 关键词: 钢筋混凝土梁 相对滑移 分析模型 平面问题 剪力 试验结果 非线性特点 滑移 试验研究 钢筋混凝土

本文对钢筋与混凝土间的握襄应力——相对滑移关系用不同方法作了试验研究,获得了弯矩、剪力共同作用下的握裹应力——滑移关系曲线。建立了模拟裂缝开展的分析模型,结构的网格可以借助于分离结点逐步变化以追踪裂缝的开展。为此编制的钢筋混凝土平面问题分析程序,考虑了材料和握裹性能的非线性特点。对于一典型梁的分析结果表明,该程序的计算结果与试验结果能较好地相符。

In this paper, the stress-slip relationship between steel bars and concrete was experimentally studied by different methods, and the grip stress-slip curve under the joint action of bending moment and shear force was obtained. An analytical model was developed to simulate cracks. The grid of the structure can be gradually changed by means of separation nodes to track the development of cracks. For this purpose, the analysis program for the plane problem of reinforced concrete was formulated taking into account the non-linear characteristics of the material and the grip performance. The analysis results for a typical beam show that the calculation results of this program are in good agreement with the test results.