带窗洞的加气混凝土砌块砌体墙抗震性能分析

为了研究设窗洞的蒸压加气混凝土砌块砌体承重墙的抗震性能,运用ABAQUS有限元分析软件对其进行了非线性分析。首先将有限元模型的计算结果与足尺试件的试验结果进行了对比验证,在此基础上,通过改变墙体的竖向压应力、水平配筋和开洞大小,研究了这些参数对墙体抗震性能的影响。研究表明:随着竖向压应力的增大,墙体水平承载力提高,而极限变形能力则有降低趋势;水平配筋可以提高墙体的承载力和变形性能;增大洞口水平尺寸导致极限承载力明显降低,而对其相应位移的影响则小得多。

Analysis of seismic behavior of aerated concrete block wall with a window opening

In order to study the seismic performance of autoclaved aerated concrete(AAC) block bearing walls with a window opening,nonlinear analysis was carried out,using the finite element(FE) software ABAQUS.The FE model was verified by comparing the computational results with the corresponding experimental ones obtained from laboratory tests of full-scale specimens of AAC masonry walls.On this basis,AAC walls with different parameters were simulated and analyzed,which include their vertical compression stress,horizontal reinforcement and opening sizes.The results show that,with the increase of vertical compression stress of the AAC wall,its lateral load-carrying capacity increases,while the deformation ability decreases;the seismic behavior of the wall can be improved by using horizontal reinforcement;horizontally increased size of the opening of the wall greatly reduces the ultimate bearing capacity of the wall,but its effect on the corresponding displacement is not such signiticant.