大型商场悬挑桁架施工顺序模拟分析——以厦门某大型商场屋面悬挑桁架施工为例

The Construction Sequence Analysis of Hanging Truss of A Large-scale Market——Based on The Roof Hanging Truss of A Large-scale Market in Xiamen

对于大悬挑等复杂结构,应考虑施工过程的影响。以厦门某大型商场屋面悬挑桁架为例进行分析,利用有限元软件模拟其施工顺序工况、分析其施工结果。分析结果认为:临时支撑的拆除,应予充分考虑悬挑部位因竖向变形而产生的附加弯矩,以及悬挑桁架的内力重分布。并基此给出相应的设计和施工建议。

The influence of construction sequence should be considered for Large Cantilevered Structure. The analysis based on the roof hanging truss of a large-scale market in Xiamen,the finite element software is used to simulate the construction sequence. The analysis results show that the additional bending moment of cantilever due to vertical deformation and the redistribution of internal forces in trusses should be should be fully considered in the demolition of temporary support. The paper introduces the design and construction suggestions according to the analysis resultst.