超高层混合结构竖向变形差异计算与分析

Calculation and analysis on vertical deformation difference during construction of super-high hybrid construction

依据CEB-FIP(1990)规范,本文研究了某超高层钢管混凝土混合结构在重力荷载作用下,框架柱与混凝土核心筒的竖向变性差异问题,在分析中考虑了施工顺序加载、混凝土收缩徐变、施工过程中构件长度的调整等因素,利用有限元软件Midas gen进行计算。结果表明,结构封顶后半年时,结构中部的方钢管混凝土组合柱会产生最大64mm左右的竖向变形,核心筒剪力墙会产生最大23mm左右的竖向变形;组合柱与芯筒墙的最大竖向变形差可达41mm左右,发生在结构中部偏上。合理安排施工顺序可以使得竖向构件变形差在伸臂桁架中产生的内力较小。

According to CEB-FIP（1990） specification, this paper, a super high-rise steel concrete hybrid structure under gravity loads, vertical variability discrepancies frame columns and the concrete core wall, and in the analysis takes into account the construction sequence loading, shrinkage and creep of concrete change, adjust the length of the member of the construction process and other factors, the use of finite element software Midas gen calculations. The results showed that after six months when the cap structure, square steel tubular columns filled center of the structure will produce about 64 mm maximum vertical deformation of shear wall core tube will produce the maximum vertical deformation of about 23mm; the maximum combined column and cartridge wall vertical deformation difference of up to 41 mm, occur in the structure of the central side. Reasonable arrangements for the construction sequence can make the difference between vertical members deform in smaller outrigger truss internal forces generated.