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国内外学者利用非线性静力方法进行结构倒塌分析时,研究对象主要集中在规则的结构形式,而针对大量出现的造型独特的竖向不规则建筑的倒塌研究还相对较少。本文基于拆除构件法,利用SAP2000结构有限元软件,对竖向不规则多层框架结构进行了基于非线性静力Pushdown方法的抗连续性倒塌研究。分别研究了拆除同一结构中不同部位构件、不同层数塔楼结构中相同部位构件后剩余结构的承载力变化情况,研究结果表明:拆除竖向承重柱后的剩余结构承载力,随着上部塔楼层数的增加以及拆柱位置的上升而出现不同程度的降低;加强裙楼顶部水平向承重构件,可以使塔楼底部构件破坏后的剩余结构更好地发挥悬链线机制,并防止剩余结构发生无明显征兆的连续性倒塌。
When domestic and foreign scholars use non-linear static method to analyze structural collapse, the research objects mainly focus on the regular structural forms, but there are relatively few studies on the collapse of a large number of vertically-irregular vertical buildings with unique shapes. In this paper, based on the dismantling component method, the SAP2000 structural finite element software is used to study the anti-collapse of vertical irregular multi-story frame structure based on the nonlinear static Pushdown method. The research on the change of bearing capacity of the remaining structures after dismantling the same parts in the same structure and the same parts in the different floors of the tower structure is carried out. The results show that the residual capacity of the structure after removing the vertical load- The increase of the number of columns and the position of disassembled columns decrease to a certain extent; strengthening the horizontal load-bearing members at the top of the podium can make the residual structure after the destruction of the bottom member of the tower better exert the catenary mechanism and prevent the remaining structure from occurring The obvious signs of the collapse of continuity.