底部框架-抗震墙砌体结构静力弹塑性分析

为了得到底部框架-抗震墙砌体结构在地震作用下的弹塑性反应,研究了这种结构水平位移模式和水平力模式的分布形式,并采用倒三角分布、均匀分布、倒三角 均匀分布等加载形式对结构进行了静力弹塑性分析.结果表明:水平力模式比位移模式更能准确反映不同地震强度作用下底部框架-抗震墙砌体结构的变形特征;随着地震强度的增加,均匀分布水平力模式的静力弹塑性分析结果更接近时程分析结果.

Pushover analysis of masonry structure with frame-shear wall at the bottom

A study was performed on the horizontal displacement-pattern and horizontal load-pattern of the masonry structure with frame-shear wall at the bottom to investigate the elasto-plastic responses of the structure to earthquakes.The inverted-triangular load distribution,uniform load distribution and combination of the two kinds of load distributions were adopted in the pushover analysis.It is shown that the horizontal load-pattern is more accurate than the horizontal displacement-pattern in reflecting the deformation characteristics of the masonry structure under different intensities of earthquakes,and that the result of pushover analysis of the masonry structure with horizontal load in uniform distribution is much close to that of time history analysis as the earthquake intensity increases.