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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。
The lateral displacement mode of infilled wall structure with bottom overhead is deduced. The base shear and shear magnification coefficient β of the overburden under large earthquakes and small earthquakes are obtained respectively by the displacement-based seismic design method. The parameters that affect the β value and β The range of values is analyzed and discussed, and the corresponding calculation charts are obtained, so that it is convenient to calculate the collapse resistance of overhead strata by the small earthquake calculation. The example calculation shows that the method is simple and feasible, and the effectiveness of the method is verified by the calculation of the collapse rate.