(华东建筑设计研究院有限公司  上海 200002)
［提要］  依据欧洲规范EC2关于混凝土弹性模量变化、徐变和收缩的规定，考虑施工顺序加载、混凝土徐变收缩、竖向构件压应力差异、施工过程中构件长度的调整等因素，结合屋顶高381m的南京紫峰大厦超高层结构，分析计算了超高层结构中组合柱与芯筒剪力墙的竖向变形及差异。结果表明，结构封顶后半年时，结构中部的型钢混凝土组合柱会产生最大80mm左右的竖向变形，芯筒剪力墙会产生最大70mm左右的竖向变形；组合柱与芯筒墙的最大竖向变形差可达12mm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。
［关键词］  超高层结构  混凝土  弹性模量  变化  徐变  收缩  竖向变形  差异
Analysis and Treatment of Vertical Deformation Difference of Super Highrise Building/Zhou Jianlong, Yan Feng(East China Architectural Design & Research Institute Co.， Ltd., Shanghai 200002,China)
Abstract:The vertical deformation difference of super highrise building is analysed combining with Nanjing Zifeng Mansion,of which roof is 381 meters high, according to provisions about elastic modulus, creep and shrinkage in European code. In analysis, the factors such as construction sequence, creep and shrinkage of concrete, difference of press stress of vertical members, adjust of components on the process of construction and etc are considered. The results of analysis indicated that composite columns occur the maximum vertical deformation of about 80mm, reinforced concrete core shear wall occur the maximum vertical deformation of about 70mm at middle position of the structural height when half a year after the structure roof is constructed. The maximum vertical deformation difference between composite columns and shear walls achieves 12mm approximately. It is pointed out that arranging construction sequence in reason will occur minor internal force in outriggers coming from vertical deformation difference between composite columns and shear walls.
Keywords:superhigh structure; elastic modulus; concrete; creep; shrinkage; vertical deformation difference