针对角钢桁架的满利用率齿行法截面优化  

Section optimization by full-using-rate zigzag method for angle steel truss

作　　者：崔磊[1] 邓洪洲[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《武汉大学学报（工学版）》2008年第3期97-100,共4页Engineering Journal of Wuhan University

摘　　要：在综合考虑应力与长细比约束的基础上,突破以往桁架优化单一应力约束与设计变量连续化的限制,提出满利用率设计思想,并引入C++语言中类的概念对截面为离散变量的角钢杆件信息进行分类优化,在优化的过程中采用了齿行的前进路线,使结果尽可能逼近真实最优解.通过一个三杆超静定桁架的截面优化实例,可以看出使用本方法在很大程度上提高了优化效率,改善了优化结果,充分体现了其相比于传统的满应力设计方法的优势.具体说明了该方法的程序实现步骤,为从事结构优化程序编制工作的人员提供参考.最后对具有除应力约束以外的局部约束条件的角钢桁架截面优化问题提出了一个可行的方向.The principle of full using rate method is proposed based on synthetically considering the stress and the slenderness ratio constrain; the concept of Class in C＋＋ language is also introduced to optimize the angle steel member by one＇s different kinds of sectional information which are discrete. The zigzag route is adopted in the optimization process, which guarantees the result approaching the optimum one. Through an example of optimization for a statically indeterminate truss made up of three members, it can be found out that using this method has greatly improved efficiency and result of optimizing, which fully reflected its advantage comparing to the traditional one. The concrete programming approach is given; it offers a reference to the persons who engaged in programming study for the structural opti mization. Finally, a feasible direction to the question of angle steel trusses sectional optimizing which includes other constrains in addition to the stress constrain.

关 键 词：优化 满利用率设计 齿行法 角钢桁架 

分 类 号：TU39[建筑科学—结构工程]