薄壁钢混凝土组合结构节点非线性有限元分析

Nonlinear finite-element analysis of thin-walled steel-concrete composite structure joints

在已有的薄壁钢—混凝土组合结构节点试验研究的基础上,研究了薄壁钢—混凝土组合结构节点的非线性力学性能。基于材料非线性及几何非线性,应用ANSYS有限元软件建立有限元模型并模拟了薄壁钢—混凝土组合结构节点受力过程,计算结果得到了试验结果的验证。对薄壁钢—混凝土组合结构节点进行了参数分析,得到了影响节点极限弯矩的主要因素,所得结果可为相关理论分析及工程应用提供借鉴和参考。

Based on the researches on the joints of thin-walled steel-concrete composite structure, the nonlinear mechanical performance （behaviours） of the joints of thin-walled steel-concrete com- posite structure was studied. Nonlinear finite-element models were formulated by ANSYS program. The models were applied to simulate the mechanical （static） performance （behaviours） of the joints of the thin-walled steel-concrete composite structure with relation to the material nonlinearity and geometrical nonlinearity. The simulated results were validated by experiments. Parameters affecting the ultimate bending moment of the joints were analysed. The results indicate that the nonlinear finite element model is practicable.