底部边界约束对填充墙RC框架结构抗侧性能影响的非线性仿真分析

Nonlinear simulation analysis on influence of bottom boundary constraint on lateral resistance performance of RC frame structure with infilled wall

底部边界约束对填充墙RC框架结构抗侧性能影响明显,考虑底部约束效应,合理计算填充墙框架结构侧移刚度及其水平抗力的设计方法亟待形成。采用ANSYS程序对3个单层单跨填充墙框架模型进行非线性仿真分析并与其试验结果对比验证之后,建立了3个单层单跨和3个两层单跨不同开洞率的填充墙框架结构模型,模拟分析了底部边界约束对填充墙RC框架结构抗侧性能的影响,得出了底部构件越刚,墙体所受约束更强,墙体受力区域及其传力路径越优,结构抗侧承载力及侧移刚度越大等结论。

The bottom boundary constraint has obvious influence on the lateral resistance performance of RC frame structure with infilled wall. Considering the effect of the bottom boundary constraint, the design method of reasonable calculating lateral stiffness and horizontal resistance of RC frame structure with infilled wall is urgently to be formed. After the nonlinear simulation analysis on 3 single-storey and single-span infilled wall RC frame structure test models by ANSYS and comparison with the test results, 3 single-storey and single-span as well as 3 two-storey and single-span infilled wall RC frame structure models with different opening rates were built for simulating and analyzing the influence of the bottom boundary constraint on the lateral resistance performance of RC frame structure with infilled wall. Analysis results that the stronger the stiffness of the bottom component is, the more constrained the wall is, and the more reasonable the wall stress area and the force transmission path is, the greater the lateral resistance bearing capacity and lateral stiffness of the structure is were concluded.