【摘要】 探讨了把首层架空框架结构简化为单质点模型的条件,对工程中常见的首层架空多层钢筋混凝土框架结构的简化条件进行了分析,指出当结构高宽比较小时,可简化成一个单层框架模型。根据单层框架模型,利用结构延性需求、等效阻尼比、地震加速度反应谱得到架空层的层间需求曲线(V-u曲线),作为架空层抗地震倒塌设计的依据。通过结构在罕遇地震下的倒塌率计算,验证了文中方法的可靠性。更多还原

【Abstract】 The equivalent conditions of frame structure with first floor open and infilled walls model simplified to single particle model were discussed.With the consideration of infilled walls,in common scale in engineering,simplified conditions of multi-story and multi-span reinforced concrete frame with open floor were collected and generalized.For checking collapse resistant,the frame can be simplified to the single floor frame model when the height-width ratio of the structure is small.The inter-story demand curve of open floor(V-u curve),as the design basis of open floor collapse resistant,was obtained through the structure ductility demand,the equivalent damping ratio and the earthquake acceleration response spectrum.The reliability of the method was checked by calculating the collapse rate of the structure under rare earthquake.更多还原