大跨度网架施工过程中内力重分布问题分析

Analysis on the Redistribution of Internal Forces in Long-span Grid Construction

随着国民审美观念的不断提高,具有外观美的大跨度空间钢结构建筑受到越来越多人的青睐,但在目前施工技术体系下事故频发。原因多是设计网架时,通常按照竣工后整体结构计算内力,选择杆件截面。但实际施工过程中,支座条件与设计计算的差异很大,导致杆件内力与设计状态不同,部分杆件出现整体失稳等现象。该文以兴文县职业技术学校迁建工程8#体育馆为例,分析了大跨度网架施工过程中的内力重分布问题,提出了解决方案,希望为今后的施工提供参考。

with the continuous improvement of national aesthetic concept,buildings with long-span spatial steel structures with beautiful appearance are favored by more and more people,but accidents occur frequently in the case of the current construction technology system.The main reason is that during the design of the grid,the section of rod piece is usually selected according to the internal force calculated of the overall structure after completion;however,in the actual construction process,there is a great difference between the bearing conditions and those for the design calculation,resulting in differences between internal forces of rod pieces and the design states and overall instability of some rod pieces.Taking the 8#gymnasium of the Vocational and Technical School Relocation Project in Xingwen County as an example,this paper analyzed the redistribution of internal forces in long-span grid construction,and put forward a solution to provide reference for future construction.