某超高层钢管混凝土框筒结构施工模拟分析及方案优化

Construction Simulation Analysis and Scheme Optimization of Super High-rise CFST Frame Tube Structure

利用有限元程序SAP2000并考虑材料、边界条件和荷载作用的时变性与桩基础沉降等影响因素,以单元生死法精确模拟了施工过程,对某超高层钢管混凝土(CFST)框筒结构在施工阶段的竖向变形差异、构件内力分布变化规律和施工方案的优化进行了研究。分析了不同工况和施工方案对CFST框筒混合结构的内力和变形的影响,得到了最优的施工方案,并根据竖向变形的分析结果,对竖向承载构件的施工标高进行了预调值计算分析。

By considering the time-dependent property of materials and boundary conditions and load and settlement of pile foundation, using the finite element program SAP2000 and element birth and death method precisely simulates the process of construction, the different vertical deformation of concrete filled steel tube and RC core wall and the internal force change of the members during the construction stage are researched. By comparing different conditions and construction schemes of concrete filled steel tube and core wall hybrid structure which have various influence on the deformation and distribution of internal force, the optimized construction scheme is selected, and based on the results of vertical deformation the pre-deformation of vertical members are calculated.