水平荷载作用下洞口对填充墙RC框架结构受力性能影响的非线性分析

Nonlinear analysis on influence of opening of infilled wall on the mechanical behaviors of RC framework under the horizontal load

在3个单层单跨、开洞率不同的填充墙钢筋混凝土框架水平荷载试验模型分析的基础上,用同样的模拟方法,对设计的19个单层单跨、不同洞口情况的填充墙钢筋混凝土框架模型进行了水平荷载作用下全过程模拟分析。分析结果表明通窗、窗洞左置和门洞右置为不利洞口情况,通窗可导致"短柱效应",使框架柱剪力明显增大,洞口率越高(或窗洞左移、门洞右移)则水平承载力和侧移刚度越低,通窗填充墙框架结构按现行方法设计存在安全隐患而非通窗类洞口填充墙框架结构是安全的。

On the basis of nonlinear analysis towards to three monolayer single span reinforced concrete frame horizontal load test models with different open hole rate, the same analogy method was used to analyzed 19 designed models which are monolayer single span specimens of infilled wall to reinforced concrete frame model with different opening conditions in the whole simulation process under the horizontal load. The research shows that the vent-window, window on the left, and door on the right are the adverse opening conditions. The vent-window will cause ＇ short column effect＇ which makes the shear of frame column increase. The higher the opening rate is （either the window moves left or the door moves right） , the lower the level bearing capacity and the lateral stiffness. The vent-window of infilled wall frame structure designed by the current way is unsafe, while the general window of the infilled wall frame structure is safe.