考虑温度效应的钢结构卸载过程变形修正方法OA

The composition of the large-span roof steel structure system is complex,and the redistribution process of structural internal forces caused by unloading is critical for construction safety.Based on the unloading construction and monitoring program of a tensile double-arch roof steel structure in a stadium in Fujian,an unloading safety monitoring technology for this type of large-span structure was proposed.The unloading mechanical characteristic analysis of the tensile double-arch steel structure was carried out through numerical simulation,and the unloading scheme and unloading monitoring scheme were deter-mined to monitor the structural stress,deformation,and temperature effects in real time during the unloa-ding stage.The numerical simulation analysis and monitoring results indicate that the measured displace-ments and stresses in the unloading process were in good agreement with the simulated values,and the measured temperature stresses were within the design range.Furthermore,after prolonging the monitoring cycle,the structural stresses and deformations tended to stabilize,which verifies that the finite element simulation can effectively guide the smooth progress of the construction and that the design of the monito-ring scheme can ensure the safety of the structure in the unloading process.