In the paper , the latticed shell of double - layer hyperbolic pyramid is vertically applied to the structure of cooling tower and reinforced concrete planks with ribs are put up around the latticed shell , in accordance with situation that the most latticed shells are applied to lateral roof and cooling tower is put up by the reinforced concrete structure , a kind of new construction that includes the lower reinforced concrete structure and the upper latticed shell structure is established 本论文把双层双曲线四角锥网壳结构竖向应用于冷却塔的筒壁，在网壳的周围挂钢筋混凝土带肋板。由于目前大多数网壳结构都水平应用于屋盖或楼盖结构和冷却塔筒壁大多数采用钢筋混凝土结构，本文的研究形成了一种上部网壳结构下部钢筋混凝土结构的新型结构。
The inherent relationship between vertical seismic internal force coefficient max and the first vertical frequency is found by researching seismic internal force coefficients of 15 kinds of psgs , then practical calculation methods for pyramid space grids is determined , and testifying is also carried out 在前面工作的基础上，通过对15种正放四角锥网架竖向地震内力系数的研究，找出最大竖向地震内力系数与第一阶竖向振型频率的内在联系，从而建立了计算正放四角锥网架竖向地震内力的实用计算方法，并进行了验证。
Principals of how to ensure geometry parameter of space grids finite element model are given and f90 program to calculate member force and chord section is developed according < < space grid design and construction code > > ( sgdc code ) so as to determine the real constant ansys needed . to create finite element model of psgs , program to create node , element number and restriction information is compiled also 给出了确定网架有限元模型几何参数应遵循的一般原则，并依据《网架结构设计与施工规程》中网架内力计算算法编制了计算周边简支条件下正放四角锥网架内力和杆件截面f90程序，从而确定采用ansys进行网架计算所需的单元实常数。
