中文摘要：

提出了一种新型球面网壳,它由投影为四边形平面的六杆四面体单元集合组成,网壳的成形构造简单,便于工业化预制生产和装配化施工.这种杆件数和节点数相对较少、网格抽空的球面网壳,也能发挥双层网壳的作用.文中给出并讨论了新型球面网壳的基本结构体系和加强结构体系.为提高结构的刚度和稳定性,网壳的上、下弦节点可采用刚接节点、半刚接半铰接节点和铰接节点,可形成四种节点布置方式和杆件特性,即四种不同计算模型的球面网壳.本文作了竖向荷载作用下的受力特性分析,获得了基本与加强结构体系、四种节点布置方式的网壳内力、位移的基本规律和相互差异,为工程设计和结构选型提供了依据.

英文摘要：

This paper proposes a new type of lattice shell composed of six-bar tetrahedral units whose pro- jections are quadrilateral. The industrialized production and prefabricated construction can be easily carried out for this lattice shell due to its simple and regular form. Though the shell has relatively fewer members and joints and some members in th, grids have been removed, the structure carl still perform like a double- layer lattice shell. The basic and reinforced structures are given. Four calculation models are established with different joint arrangement patterns and member properties. The joints can take various forms in the models, including rigid joint, semi-rigid-semi-hinged joint and hinged joint, which will result in divergent stiffness and stability performances of the structure. The static characteristics of the lattice shell under vertical load are analyzed, from which the distribution of the internal forces and the displacements of the basic and reinforced structures with four joint arrangement patterns can be gained. The results can provide some guides to the engineering design and selection of structural patterns.