大跨度支撑幕墙结构梁加固回顶关键技术

Key Technology of Beam Reinforcement and Back-propping for Super-long Span Curtain Wall Structure

对于超大跨度已加载结构受新增额外荷载的影响导致原设计承载力不能满足使用要求时,对结构加固提出了先卸载、再加固的技术要求。针对某站房工程,通过施工仿真模拟计算大跨度梁挠度法进行位移控制,采用回顶关键施工技术措施回归结构受力状态。

When the super-long loaded structure was affected by new additional load,it would lead to the original design bearing capacity of the structure could not satisfy with the operational requirements,it presented the technical requirement of the load should be firstly unload and then the reinforcement could be adopted for the structure.The main purpose of this dissertation was to control the movements of the structure through the method of simulative and emulational calculation on the super-long span beam deflection.The Back-propping approach was adopted on the key point in order to make the structure to return the unloaded condition.