反复荷载下钢筋混凝土框架节点非线性分析

论述了反复荷载下分析、计算普通钢筋混凝土及轻骨料钢筋混凝土框架节点的非线性有限元分析方法 ,采用等效单轴应变的增量正交异性混凝土本构关系模型和反复荷载下应力应变关系的“焦点模型” ,编制二维非线性有限元分析程序 ,基于四个混凝土边节点的试验结果 ,对钢筋混凝土和轻骨料钢筋混凝土框架节点进行非线性有限元对比分析 ,计算的结果与试验吻合较好。

The Nonlinear Analysis of Reinforced Frame Joints Under the Reversed Cyclic Load

A nonlinear finite element analysis of reinforced concrete and reinforced light weight aggregate concrete peripheral joints under reversed cyclic load is studied. The incremental orthotropic model based on equivalent uniaxial strain and the "focal points model" under revered cyclic load was used. Two dimensional nonlinear finite element program has been developed for analyzing peripheral joints based on four experiments of ordinal concrete and light weight aggregate concrete peripheral joints. The calculated and measured are shown to be in good agreement.