拉索预应力双层柱面网壳结构布索方案研究

预应力双层网壳结构，主要布索方案有结构体内布索、结构体外直线和折线布索。但网壳结构类型众多，在讨论网壳结构的布索方案时是难以面面俱到的，只能通过对典型结构的研究得出一般规律。本文提出一种新型布索结构形式，且以拉索预应力双层柱面网壳结构为例，研究了用高强钢索代替网壳沿短跨方向的下弦所有杆件，当每段索上施加不同预应力时所引起的结构内力和位移的变化规律，并与其它布索方案进行对比分析，突出了该结构的特点和优势，为工程应用提供了新的结构形式。

Investigation on Layout of Cables for Prestressed Lattice Shell Structure of Two-layer Cylindroid

The main layouts of cables for two-layer prestressed lattice shell structure are internal layout and external straight line and broken line layouts. Since there are various lattice shell structures, it is hard to study all kinds of them clearly .So by studying typical structure,the typical regularity may be obtained. In this paper,a new form of cables is put forward and a typical two-layer prestressed lattice shell structure is taken for example. By comparing with the other layouts of cables, the character and superiority of the example structure are demonstrated.