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结合实际工程设计 ,选取轻型薄壁钢管拱形屋盖的矢高、拱形桁架高度、杆件截面面积作为优化设计变量 ,以轻型钢管拱形屋盖的总造价最低为目标函数 ,建立了优化设计的数学模型 ,采用直接搜索法与准则法有机结合的综合优化设计方法 ,按规程的要求对轻型钢管拱形屋盖的几何外形及杆件的截面进行了综合优化设计 ,考虑了各种情况的荷载作用 ,编制了SLAOP软件。在中小跨度情况下 ,采用本文方法设计的轻型钢管拱形屋盖体系综合造价比传统结构体系的节约 1 0 % ,而且具有屋盖体系轻、荷载小、施工不受季节限制、周期短等优点 ,具有良好的经济效益和发展潜力。
Combined with the actual engineering design, the selection of the arch height, arched truss height and cross-sectional area of the thin-walled steel pipe as the optimal design variables, the optimal design of the light steel arched roof is taken as the objective function, The mathematical model of direct search method and criterion method is used to synthetically optimize the design method. According to the requirements of the rules, the geometrical appearance of the light-gauge steel arch dome and the cross section of the rod are comprehensively optimized. Considering the various situations Load, prepared SLAOP software. In the case of small and medium-span, the comprehensive cost of the light steel pipe arched roof system designed by this method can save 10% of the cost of the traditional structural system, and has the advantages of light roof system, small load, no season restriction and short period of construction , Has good economic benefits and development potential.