大高宽比支撑体系在渐变超高大悬挑结构中的关键技术研究

A Key Technology Study of Large Aspect Ratio Shuttering in the Gradual Change and Ultra-high Cantilever Structure Construction

在文锦渡口岸工程的联检综合楼中,采用了一种构造复杂、造型特异的结构设计方案,本文将之命名为"渐变超高大悬挑结构"。通过方案比选优选确定该结构的支撑体系方案,建立支撑体系的有限元模型,根据结构与支撑体系共同工作的时变性原理,分析有限元模型的内力计算数据,找出大高宽比支撑体系的构造缺陷薄弱点并加以优化,保证了支撑体系的稳定承载力,揭示了不同施工期多层悬挑结构支撑体系的内力变化主要规律。

In the project of Wenjindu Port,a kind of complicated and varied structure design was applied by Joint Inspection Building,this article named it as"Gradual Change and Ultra-high Cantilever Structure Construction".The structure of the shuttering solution is determined by comparison and selection,and a finite element model of the shuttering was established.According to the time-dependent principle of combination work of the structure and shuttering,the internal force of the finite element model was analyzed,the structural weakness of large aspect ratio shuttering was identified and optimized to ensure the stability of the shuttering bearing capacity,and to reveal the main rules of multi-layer shuttering in the cantilever structure at different construction periods.