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应用MIDAS和ANSYS两种软件,对采用有索张拉和无索施加等效平衡荷载两种模型的贵阳奥体中心主体育场预应力大悬挑桁架结构,运用连续分析法和分步一次加载法两种计算方法,对施工全过程中结构力学响应进行了仿真分析。通过对比分析两种不同计算模型的拉索内力、结构杆件应力和结构变形的计算结果,证实一次加载法是安全的。通过对预应力张拉过程中索力与主体结构端部位移值两项关键技术指标的仿真计算结果与工程实测结果的分析对比,证实大悬挑桁架结构在上弦施加预应力是有效的。
Using MIDAS and ANSYS software, the main stadium prestressed large cantilevered truss structure of Guiyang Olympic Sports Center with two models of cable tensioned and unsymmetrical balanced load was applied. By using continuous analysis and step-by-step loading Two kinds of calculation methods are used to simulate the structural mechanics response during the whole process of construction. By comparing and analyzing the calculation results of the internal force of the cables, the stress of the structure bars and the deformation of the structure of the two different calculation models, it is proved that the one-time loading method is safe. By comparing the simulation results of the two key technical indexes of the cable force and the displacement of the main structure in the process of prestressing tension with the measured results of the engineering, it is proved that the large cantilevered truss structure is effective in winding up the prestress.