摘要
本文以整体结构为分析对象,采用文中提出的“广义力”法,详细地计算出排架结构的极限承载力,绘出了作用在排架上的总压力∑N和总弯矩∑M的关系曲线(∑N/∑N,—∑M/∑M,),并以此为基础,以与现行规范公式一致为原则,提出了以整体排架为对象的叠柱设计公式,算例证明其比现行规范以及AISC LRFD设计式来得经济,且能保证其有足够的安全度。
This paper discusses the total structure as a studying object. The general-force method in this paper is adopted to search out the limit local of steel bent. The ∑N/∑N,—∑M/∑M, relation curve,in which ∑N is the total compression force and ∑M is total moment on the steel bent. On the basis of them,in order to keep the same type as current core' s design formula, a superposition column design formula is regarded total steel bent. The calculation example shows that it is more enconomic than GBJ 17—88 and AISC LRFD design formula, and it is of sufficient safety.
关键词
钢排架
极限
承载力
叠柱
steel bent
limit local capacity
elastoplastic analysis
relation curve
superposition column design formula
