上海某高层建筑带长悬挑转换桁架结构分析

Analysis of a High-Rise Building with Long Cantilever Truss Transfer Structure in Shanghai

摘要: 某高层商办楼由于建筑立面效果要求，在南主出入口处3层立面存在大跨度悬挑转换桁架结构，悬挑外端抬柱三层，悬挑长度为9.4 m，属于长悬挑结构的超限高层建筑。对悬挑转换桁架结构进行了小震下的单榀桁架的计算分析；对转换桁架的关键构件进行大震下的抗震性能分析；对大跨度悬挑桁架结构的楼盖作舒适度验算分析；对悬挑部位的楼层作楼板应力分析以及对桁架的关键构件节点进行大震下的有限元分析，确保该结构转换桁架安全、可靠。

Abstract: Due to the facade effect requirements of a high-rise commercial office building, there is a long- span cantilever transfer truss structure in the three-story facade of the south main exit entrance, and the cantilever outer end lifting column has three layers. The cantilever length is 9.4 m, which belongs to the over-limit high-rise building with a long cantilever structure. A single truss is calculated and analyzed for the cantilever transfer truss structure; the seismic performance of the key components of the transfer truss is analyzed; the comfort checking analysis of the floor of the long-span cantilever truss structure is made; the floor stress analysis of the overhanging part of the floor is made and the key component nodes of the truss are analyzed by finite element method, ensure the safety and reliability of the structural transfer truss.