填充墙框架结构架空层剪力放大系数探讨

Research on shear amplification coefficient of overhead layer of infilled frame

推导了底部架空的填充墙框架结构的侧移模式,用基于位移的抗震设计方法分别得到大震和小震下架空层的基底剪力和剪力放大系数β,对影响β值的参数以及β的取值范围进行了分析探讨,并得到相应的计算图表,可较方便地通过小震计算进行架空层抗大震倒塌的计算。算例计算表明该方法简单可行,并通过倒塌率的计算验证了方法的有效性。

According to the lateral displacement mode of overhead layer of infilled frame and the anti-seismic design method based on displacement,the base shear and the shear amplification coefficient β of overhead layer under strong and small earthquake were obtained.According to analysis and research of the parameters that influencing β and the range of β,the corresponding nomograph was got,and the calculation of collapse resistance under strong earthquake could be gained more easily through calculation under small earthquake.The calculating example indicates that the method is simple and feasible,and the calculation of collapsing ratio proves that the method is effective.