设门洞的加气混凝土砌体芯柱组合墙抗震性能分析

摘要

In order to study the seismic performance of aerated concrete block masonry composite wall with a door opening,numerical simulation was conducted by using finite element software ABAQUS. The finite element results were verified with the laboratory results of full-scale specimens. On this basis, the composite walls with different parameters were investigated, which includes their vertical compression stress, opening sizes and opening position. The results show that with the increasing of vertical compression stress,the seismic performance improve;however, the effect of the vertical compression stress on the ultimate load is less than that on the displacement under ultimate load;With the increasing of the door width, the decrease in the wall's bearing capacity is proportional to the decrease in the wall's net area; and the change of door's position has less effect on seismic performance of the composite wall.%运用 ABAQUS 有限元分析软件对设门洞的加气混凝土砌体芯柱组合墙进行了数值模拟，研究其抗震性能。在有限元模型的计算结果与先前足尺试件的试验结果进行了对比验证的基础上，研究了竖向正压力、洞口设置的大小及位置三因素对墙体抗震性能的影响。研究表明：随竖向压应力的增加，墙体的抗震性能得到改善；但竖向压应力对极限荷载的影响小于对极限荷载下位移的影响；门洞宽度增大时，墙体的极限承载力降低，降低程度与墙体截面积的削弱程度基本成比例；门洞位置的改变，对墙体抗震性能的影响较小。