超高层连体分叉核心筒整体提升钢平台模架体系研究

Research on overall lifting steel platform formwork system for super high-rise with conjoined-bifurcated core tube

整体提升钢平台模架体系以其封闭性好、安全性高、承载能力强、施工速度快等优点,越来越多地应用于超高层结构核心筒的建造中。以吴江绿地中心超高层分叉核心筒钢平台结构设计为例,针对钢平台结构的设计要点进行分析,系统阐述了钢平台分体及组合设计理念。在完成钢平台设计的同时,利用有限元软件分别在正常工作状态下和爬升状态下对钢平台结构进行验算,包括对整体结构及薄弱点进行有限元计算分析。计算结果表明:正常工作状态下,钢平台结构的最大水平位移能够满足设计要求。爬升工作状态下,钢平台结构的最大水平位移、牛腿结构的承载力均满足设计要求,说明钢平台结构设计合理安全,可以满足连体分叉核心筒结构的施工需要。

With the advantages of good sealing, high safety, strong bearing capacity and fast construction speed, overall lifting steel platform formwork system is more and more used in the construction of core tube of super high-rise structure. Based on the structural design of super high-rise bifurcation core tube steel platform in Wujiang Green Space Center, the key points in the structural design of steel platform were analyzed, the design concept of split and composite structure of steel platform was expounded systematically. The design of steel platform was completed, the finite element calculation analysis of its overall structure and weak points were carried out under normal working conditions and the climbing working state. The results of calculation show that under normal working conditions, the maximum horizontal displacement of the steel platform structure can meet the design requirements. Under the climbing working state, the maximum horizontal displacement response of the steel platform structure and the von Mises effective stress in the local compression zone of the corbel structure can meet the design requirements. The safety and the rationality of the steel platform were verified. It can meet the construction needs of the conjoined-bifurcated core tube structure.