拱支网壳结构的力学性能分析

拱支网壳结构体系是在综合了网壳（网架）及拱结构等优点的基础上，构思出的一种新型大跨度空间杂交结构形式，在理论分析和模型试验研究的基础上，对该结构体系的力学性能进行了分析，并比较其经济性指标。研究结果表明，由于拱结构的参与，该杂交绘声结构的受力性能得到明显改善，使得该结构体系具有更广阔的应用前景。

Research on Mechanic Behaviors of Large-span Arch-supported Reticulated Shell Structures

Based on the structural features of reticulated shells,arch structures,etc.,the arch supported reticulated shell structures have been developed as a new large span space structural system.In this paper,compared to normal singe layer reticulated shells,the mechanic behaviors of the hybrid structures,especially the effects of initial geometrical imperfection,are investigated through nonlinear analysis and test research of three models,including two typical models of the arch supported reticulated shell structures and a model of the normal single layer reticulated shell structures.Analysis indicates that,compared to normal singe layer reticulated shells,the hybrid structures can efficiently weaken the geometrical imperfection sensitivity and improve their mechanic behaviors,which prove that this type of hybrid structures can be widely used.