This paper deduces a stiffness matrix of cable member,which is better suitable for analysis of prestressed reticulated shell in use than the former stiffness matrix of cable element.

• 推导了预应力网壳结构在正常使用阶段的预应力索单元的特性矩阵。比较分析表明，与以前使用的索元公式相比，新导算式更适合于预应力网壳结构的分析。