预应力索-桁架结构布索位置优化设计

The location optimization design of laying out cables of prestressed cable supported truss

对于预应力索承桁架索力值、构件截面尺寸、布索位置进行优化设计.通过满应力设计确定索力值和截面尺寸以减轻结构重量,通过逐步移动索节点位置以增加结构刚度.算例表明,该方法能使结构重量逐步减轻,结构刚度不减,布索位置逐步达到最优.

In this paper,the optimization design of cable pretension force and member's section size and cable location of prestressed cable-supported truss is discussed.In order to solve the problem,full stress design method is applied to calculate the cable pretension force value and cross-section size to reduce structural weight and evolutionary method of nodes is provided to optimize the cable location to increase structural stiffness.The examples in this paper indicate that the method has the merit,in which structural weight reduces gradually without stiffness decrease and the cable's location works up to the optimal status.