框架填充墙结构在地震作用中受到的破坏最为严重,亟需提出针对该类结构合理有效的分析和计算模型.文章中,对一幢纵横向均为三跨的五层框架填充墙结构采用SAP2000结构分析软件进行有限元分析,先后按实际填充墙布置建模、以及按照等效斜撑布置建模,对比规范规定的采用0.7的周期折减系数的分析方法.验证了规范中所采用的周期折减系数是严重低估填充墙对框架结构刚度的影响的,在设计中将导致严重安全隐患.并同时提出了更为简便、且满足工程要求的等效斜撑截面面积计算方法,建议在框架填充墙结构的相关分析和设计中采用此方法.%The collapse of RC infilled frame located the most significant place.Therefore.the propose of reasonable analysis method and FEM model becomes a task extremely urgent.A RC infilled frame with three bay in both X and Y direction and 5 floors is specified in this essay,two modeling method are employed.those are practical modeling and equivalent diagonal bracing modeling.These two metod is used to compare with the most widespread designing mean of adopting reduction factor 0.7 which written in the code.More convennient as well as practical method of calculating the section area of the equivalent diagonal bracing is proposed.Meanwhile, the disadvantages of adopting the reduction factor 0.7 is proved as well.
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