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对于上部大跨空间桁架与下部混凝土支承结构组成的混合结构体系,考虑上下部结构间的协同工作很有必要。考虑到计算的经济性,当下部支承结构体量比上部结构大很多时,能否仅选取部分支承结构来分析协同工作效应还有待研究。以武汉银河汇工程为算例,通过选取不同界限内的支承结构建立不同的结构模型,分析其对上部大跨空间桁架与下部混凝土支承结构体系协同工作的影响。计算结果表明:仅选取部分支承结构考虑协同工作效应具有可行性,但部分支承结构模型与全部支承结构模型的计算结果还存在一定差异。
For the mixed structure system composed of the upper long-span space truss and the lower concrete supporting structure, it is necessary to consider the cooperation between the upper and lower structures. Considering the economy of calculation, when the volume of the lower support structure is much larger than that of the upper structure, it remains to be studied whether only some of the support structures can be selected to analyze the synergistic effect. Taking the project of Galaxy Project in Wuhan as an example, different structural models were established by selecting the support structures in different boundaries and the influence of space truss on the coordination between the upper long-span space truss and the lower concrete support structure system was analyzed. The calculation results show that it is feasible to select only part of the supporting structures considering the synergistic working effect, but there are still some differences between the calculated results of some supporting structures and all the supporting structures.