平板网架综合优化设计

同时选取平板网架的高度、网格数及杆件截面作为设计变量,以网架的总造价最低为目标函数,按新规范要求对网架的外形及杆件的截面进行综合优化设计,并考虑了竖向及水平地震作用,提出了网架抗震设计的建议。内力分析采用空间析架位移法,优化方法采用直接搜索法和准则法有机结合的综合优化方法。并编制了SP-COD(FORTRAN77)程序,在Sun75 GX工作站上实现。

Comprehensive Optimum Design for Slab-space Truss Structure

The height, the number of network and the cross-section of the bar for the space truss structure are taken as the design variables; and the total cost of the truss structure is taken as the objective function in this paper. According to the new "Stress Structure Cord", the comprehensive optimum design method of the shape and cross-section for the truss structure is adopted; the horizontal and vertical earthquake load is considered; and the new design method for space truss structure is suggested in this paper. The finite element method is used for space truss structrue; the organic combination of the direct searching and criteria method is adopted as the optimum method; and the "SPCOD" is programmed for the optimum design of the space truss structure.