【摘要】 阐述了点刚度法的基本概念。以 4 5m× 81m双层柱面网壳为例 ,对柱面网壳杆件布置形式对网壳刚度及用钢量的影响进行了研究。分析了两向正交正放、两向斜交斜放、正放四角锥、棋盘形四角锥、正放抽空四角锥等几种形式在相同荷载条件下的内力分布、三个方向最大位移及用钢量方面存在的差别。用点刚度法加以解释 ,得出了一些方法和结论。更多还原

【Abstract】 The basic concept of the dot digidity method is discussed here.Taking the 45m×81m double cylindrical mesh as an example,the reseach is conducted on the effect of the arrangement of the double cylindrical mesh on the rigidity of the mesh and steel consumption.In addition,the differences are analyzed existing in the internal stress’ distribution,the Greatest three-dimensional dislocation and the steel consumption of such different forms as biextensional orthogonal joints and positions,biextensional oblique joints and positions,orthogonal quadrangular pyramids,chessboard-shaped quadrangular pyramids and orthogonally positioned extracted quadrangular pyramids under the same load.In compliance with the explanation of the dot-digidity method,some other relevant methods and conclusions are obtained.更多还原