【摘要】 本文对钢筋混凝土拱桁架进行优化设计,首先初拟断面尺寸,用刚架有限元进行内力计算.然后对每类杆用0.618方法进行优化设计.用优化的断面尺寸对结构进行内力重分析和对杆件再优化.依此迭代下去,直至收敛.此时可得出结构造价最省的断面尺寸和相应配筋.本文例举了三个实例说明拱桁架优化设计的经济效益.更多还原

【Abstract】 An optimum design for R.C. spandrel braced arch is presented. After assumption of R.C. member size, internal forces are computed by the frame finite element method. T?en, the ’0.618’ method is used to optimize each member. With the optimum sectional size, the internal forces are computed, and each member is optimized again. This procedure is continued by iteration until the convergence approachesFinally, the optimum design of minimum cost is obtained. Three examples are shown in this paper.更多还原