立体预应力钢桁架优化设计及最优高度研究

STUDY ON OPTIMIZATION DESIGN AND OPTIMAL HEIGHT OF SPACE PRESTRESSED STEEL TRUSSES

以钢桁架结构的造价为目标函数,采用罚函数的方法,对倒三角形立体钢桁架及倒三角形立体预应力钢桁架计算模型进行优化设计。通过对大量计算结果的研究,得出了几种跨度下立体钢桁架及立体预应力钢桁架的最优高度。对于相对较小的荷载,可以找到立体钢桁架及立体预应力钢桁架的经济高跨比范围。

By using Sequence Uncontrained Minimization Technique and having costs of steel trusses as objective functions, we optimized the computational models of nabla space steel trusses and nabla space prestressed steel trusses. By study of large amount of computational results, the optimal heights of space steel trusses and space prestressed steel trusses of several spans are got. For the relatively smaller loads, the economical height-to-span ratio scopes of space steel trusses and space prestressed steel trusses can be found.