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上部大跨桁架拱结构与下部混凝土框架支承结构体系常见于一些大跨结构中。对于此类混合结构,现阶段的设计单位多不考虑两者间的协同工作分开进行分析设计,然而这样的处理方式是否合理还有待商讨。通过对某文化遗址大跨桁架拱护棚结构的单独计算与考虑上部护棚结构和下部混凝土支承结构协同工作的整体计算进行对比,得出考虑协同工作与否,两者在支座反力、杆件内力、单元应力、结构位移和整体稳定性方面的差异。结果显示,该工程上部大跨桁架拱护棚结构考虑协同工作与否,在静力分析、动力时程分析和整体稳定性分析时各项参数计算结果均相差不大,不考虑协同工作的计算结果也可满足工程精度要求。
The upper long-span truss arch structure and the lower concrete frame support structure system are commonly found in some large-span structures. For such a hybrid structure, the design units at this stage and more do not consider the collaborative work between the two separate analysis and design, but whether this approach is reasonable to be discussed. By comparing the calculation of the single span of a large-span truss arch shed with a cultural site with the overall calculation considering the cooperation of the upper shed structure and the lower part of the concrete supporting structure, the conclusion is drawn that whether the collaborative work or not, Rod internal forces, element stresses, structural displacements and overall stability. The results show that the structure of the large-span truss arch cantilever structure in the upper part of the project is considered cooperatively or not. The calculated results of the parameters in the static analysis, the dynamic time history analysis and the overall stability analysis have little difference, and do not consider the calculation of the collaborative work The results also meet the engineering accuracy requirements.