基于时变效应的超高层结构施工过程与建成初期竖向变形分析

Vertical Deformation Analysis of One Super High-rise Structure Based on Time-varying Effect during Construction Process and the Initial Stage of Completion

针对某超高层框架(钢管混凝土柱+钢梁)-钢筋混凝土核心筒-伸臂桁架混合结构,综合考虑施工过程中混凝土收缩、徐变及强度增长的时变效应,进行了框架柱与核心筒的施工模拟分析、以及外框与核心筒之间的竖向变形差与内力重分配效应的计算分析。研究结果表明,收缩和徐变导致的核心筒竖向变形是不可忽视的重要因素,对外框与核心筒之间的竖向变形差与内力重分配效应具有明显影响。针对这些影响,从设计、构造、施工工艺等方面提出了相应的措施,可供同类工程建设时参考。

For one super high-rise hybrid structure with concrete filled steel tube column and steel beam frame-RC core tube-extended arm truss,the time-varying effects of concrete shrinkage,creep and strength growth are comprehensively considered,and further the construction simulation analysis of frame column and core tube and the calculation analysis of vertical deformation difference and internal force redistribution effect between outer frame and core tube are carried out. The study results indicate：the vertical deformation of the core tube caused by shrinkage and creep is an important factor that can not be ignored,and it has an obvious effect on the vertical deformation difference and the internal force redistribution effect between outer frame and core tube. The corresponding measures are put forward from the points of design,constructional detail and construction technology,which can be used for reference in the construction of similar projects.