大跨空间管桁架结构体育场屋盖卸载全过程模拟与监测

Simulation analysis and monitoring of whole unloading process of a stadium roof with large-span spatial pipe truss structure

文章以安徽省天长市某体育场为工程背景,研究大跨空间管桁架钢结构屋盖分区同步卸载方式,提出分区、同步卸载方案,并对钢结构屋盖的卸载全过程进行实时动态监控;运用有限元分析对施工全过程进行模拟计算,并将现场实测数据与数值模拟结果进行对比分析,保障屋盖结构在卸载过程中处于安全稳定状态,圆满完成卸载。屋盖卸载过程中应力与位移变化均在设计范围以内,有限元模拟分析与实测结果吻合较好。研究结果可为其他大跨空间管桁架结构屋盖卸载方案设计、应用及施工过程监控提供参考。

Based on a stadium project in Tianchang City,Anhui Province,this paper studies the zonal synchronous unloading method of large-span spatial pipe truss steel roof,puts forward the zonal synchronous unloading scheme,and carries out real-time dynamic monitoring of the whole unloading process of steel roof.Finite element analysis was used to simulate the whole construction process,and the field measured data and numerical simulation results were compared and analyzed.The roof structure was in a safe and stable state during the unloading process,and the unloading was successfully completed.The variation of stress and displacement during roof unloading is within the design range,and the finite element analysis agrees well with the measured results.The research results can provide reference for the design,application and construction process monitoring of other large-span spatial pipe truss roof unloading schemes.