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设置临时支撑几乎是所有大跨度空间钢结构施工过程中必然要遇到的问题。由于临时支撑的存在,改善了结构的受力性能,使结构更加安全,但是辅助用钢量也会增加较多。在符合受力的前提下,如何实现建造过程中安全和经济的平衡是施工研究的关键。以世界大学生运动会主体育场实际工程为例,对结构进行临时支撑提前卸载分析,并将计算结果同未提前卸载的分析结果进行比较,给出了结构内力和变形的变化趋势,提出了有针对性的改进意见。分析计算结果表明:直接循环卸载方案不安全因素较大,而考虑关键位置修正的循环卸载方案可以运用于大跨度空间结构的施工中,为大跨度空间结构合理施工提供参考。
Set temporary support Almost all large-span space steel construction inevitable problems encountered in the construction process. Due to the existence of temporary support, the structure of the improved performance, to make the structure more secure, but the amount of auxiliary steel will increase more. In line with the premise of the force, how to achieve the safety and economic balance in the construction process is the key to construction research. Taking the actual project of the main stadium of the World University Games as an example, the structure is temporarily unloaded and analyzed in advance, and the calculated results are compared with the analysis results without prior unloading. The change trend of the internal forces and deformation of the structure is given, Suggestions for improvement. The results of the analysis and calculation show that the unprotected factors of the direct cycle unloading scheme are large, and the cyclic unloading scheme considering the key position correction can be applied to the construction of the long-span space structure and provide a reference for the rational construction of the long-span space structure.