拱桁架结构优化设计

合理的结构形式可以降低工程造价。本文通过工程实例，分析带拉杆拱桁架选用的原因，并在普通两支座拱桁架的基础上。创造性地采用了四支座拱桁架，两者的用钢量均不足常规设计用钢量的1／3，四支座带拉杆拱桁架用钢量又比两支座带拉杆拱桁架减少6％，排架柱的配筋减少25％。四支座带拉杆拱桁架结构经济效益显著，值得采用和推广。

Optimization Design of Arch Truss Structure

Reasonable structure can cut down project cost. According to the practice of the project, this paper focuses on the reason for adopting arch truss with drawbars. We adopt four support blocks arch truss creatively instead of two ordinary support blocks arch truss. In this way, the dosage of steel is less than 1/3 of general case. Moreover, the steel dosage of four support blocks arch truss with drawbars reduces by 6%, while the reinforcement ratio of the columns in the bent reduces by 25%. The economic benef...