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以贵阳201大厦为例,采用MIDAS软件对其子结构的敏感构件进行线弹性拆杆分析,采取控制截面边缘最大应力的简化判定准则,考察杆件1～4共4种单杆失效工况下结构抗连续倒塌能力。对杆件1,2均失效后的子结构进行静力非线性分析,验证框架作为子结构第二道防线的可行性。研究结果表明,在不同敏感构件失效情况下,子结构整体具有多种传力路径,能实现内力重分布,有较高的冗余度;子结构框架能作为第二道防线,结构整体具有较高的抵抗连续倒塌能力。
Taking Guiyang Building 201 as an example, this paper uses MIDAS software to analyze the elastic components of its substructure by elastic linear disassembly and adopts the simplified criterion to control the maximum stress of the section edge. Structural resistance to continuous collapse. Subsequent static failure analysis of the sub-structure after the failure of the members 1, 2 is carried out to verify the feasibility of the frame as the second line of defense of the sub-structure. The results show that the substructure has a variety of force transmission paths under the condition of different sensitive components failure, which can redistribute the internal forces with high redundancy. The substructure framework can serve as the second line of defense, and the structure as a whole has more advantages High resistance to continuous collapse ability.