底框-密肋复合板结构非线性有限元分析

针对底框—密肋复合板结构受力复杂的特点，为了探讨结构整体在地震中受力与变形全过程，本文采用IDARC有限元分析软件，依据Park三参数滞回退化规则，建立计算模型，通过对比分析结构滞回曲线计算值与试验值，结果表明曲线吻合良好，以验证模型的正确性，为该类结构计算分析提供参考。运用ANSYS模拟结构在弹塑性阶段的细部受力特征及加载过程的裂缝发展变化，与试验现象进行对比，进一步说明密肋复合板结构层层嵌套的构造形式使得整体结构抗震性能提高，并基于ANSYS有限元分析模型，探讨洞口尺寸和位置的改变对墙体抗震性能的影响。

Nonlinear Finite Element Analysis on Multi-ribbed Composite Slab Structure with Framework at the Bottom

In order to study the whole process of stress and deformation of the overall structure in the earthquake,based on complex loading on multi-ribbed composite slab structure with framework at the bottom,a calculation model was established incorporated in the program IDARC by the hysteretic rules of Park-three-degradation-parameter,and the comparison and analysis was made between numerical simulation and experiment of hysteretic curves.The results showed that the curves are in good agreement,besides,it verified the correctness of the model,and provided references for the analysis and calculation of this kind of structure.Afterwards,detailed stress characteristics of the specimens in the elastic-plastic stage and crack development were simulated by ANSYS and compared with test phenomena,which showed that the design of nested structural form of multi-ribbed composite slab can improve the seismic performance of the whole structure.