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本文考虑了有内拉环和无内拉环两种形式结构的优化设计,三个设计变量,十个约束条件,以结构造价为目标函数。对约束条件处理后,用Powell方法进行了优化,结果表明,内环垂直变位约束[Dp]对造价与结构选型影响十分大,当[Dp]较小时,有内拉环的结构经济性较好,当[Dp]较大时,则无内拉环的结构更经济,结构总造价随[Dp]的增大而明显下降,在一定范围内对造价影响不大,本文可为此类结构造型,决定结构初步设计尺寸及为规定合理的[Dp]尺寸提供参考依据。
This paper considers the optimal design of two types of structures with inner pull rings and no inner pull rings, three design variables, ten constraints, and the construction cost as the objective function. After the constraint conditions were dealt with, the Powell method was used to optimize the results. The results show that the inner loop vertical displacement constraint [Dp] has a great influence on the cost and structure selection. When the [Dp] is small, there is a structural economy of the inner loop. Better, when [Dp] is large, the structure without inner pull rings is more economical, the total construction cost decreases significantly with the increase of [Dp], and the impact on the cost is not significant within a certain range. Structural modeling determines the initial design dimensions of the structure and provides a reference for the reasonable [Dp] dimensions.