深圳平安金融中心施工模拟研究

针对超高层建筑在传统模拟过程中未考虑施工过程和时变荷载效应的问题，本文以在建的中国第一高楼——深圳平安金融中心为工程背景，用Midas/Gen软件将结构分成了25个施工阶段进行了施工全过程模拟.研究了考虑收缩徐变作用下核心筒和巨柱的竖向累积变形规律及其变形差异.模拟结果表明，超高层建筑中混凝土收缩徐变引起的变形约占总变形的一半，其影响不能忽略；同时研究了结构的带状桁架、伸臂桁架、巨型斜撑和V型支撑等关键部位随施工阶段的应力变化规律.结果显示结构不同位置的杆件受力情况不同，桁架层的弦杆应力随施工阶段变化较小而腹杆应力随施工阶段变化较大，结构设计中可针对不同受力的构件设计不同截面.结构竣工后杆件所受应力均小于材料强度设计值.
In high-rise buildings, construction process and non-load effect are not considered in conventional finite element analysis. In this paper, for the construction project of Shenzhen Pingan Financial Center (PAFC)， which is the highest tall building under construction in China, full construction process simulation was conducted by dividing the structure into 25 construction stages using Midas/Gen software. Vertical cumulative deformations of the concrete core-wall and mega columns, and the deformation variance due to the shrinkage and creep of concrete were studied. The simulation results show that vertical deformation caused by the shrinkage and creep causes more than half of the total deformation, and the effect of the shrinkage and creep cannot be ignored. In addition, the internal forces of the critical members in the building structure including belt trusses, outriggers, mega diagonal brace, and V-typed brace during construction were also investigated. The different loading conditions were applied to the structural members at different locations. The stress of cord members in the trusses changes little, while the stress of web members in the trusses changes significantly during the construction process, which indicates that the design of the structure members can be varied with the loading conditions. In the final construction stage, the stress of the structure members is less than the material strength with a certain safety margin, and the measurement data can be used as reference for actual construction.