单调荷载下钢筋高强混凝土框架节点的非线性有限元分析

Nonlinear finite element analysis of joints within HRC beam column under monotonic loading

论述了单调荷载下分析、计算钢筋高强混凝土框架节点的非线性有限元方法 .针对高强混凝土选用基于等效单轴应变的增量式正交异性混凝土模型 ,高强混凝土单轴受力下的σ ε关系 .钢筋σ ε关系采用弹塑性模型及高强混凝土和钢筋之间采用双垂直弹簧模型 ,通过编制的二维非线性有限元分析程序计算了在单调荷载下的 4榀高强混凝土框架节点试件 ,计算结果与试验结果均吻合较好 .

A nonlinear finite element analysis of joints within HRC beam column under monotonic loading is discussed. The incremental orthotropic model based on equivalent uniaxial strain and the stress strain relationship of HRC under monotonic loading are used. For stress strain relationship of steel, ideal elastoplastic model is chosen. A two spring bond element between HRC and steel are adopted. A two dimensional finite element program has been developed for analyzing HRC beam column joints under monotonic loading. The calculated and measured results are shown to be in good agreement.