Abstract: In this paper,a new method of determining the stress distriution in cross-seetion has been used to anal- yse the stiffen franeword arches in whieh the concrete laycrs are cast in place layer upon layer at the differ- ent time. A recurrence algorithm is cmployed using Dirichlet series instead of creep and shrinkage func- tions in the Brideg Code. For composite concrete-conerete and sreel framework seetion members,another method for the calculation of the equivalent creep and shrinkage loads has been presented By these methods, the strucnre can be analysed in micro-computer.In comparison with other methods,some conclusions have been drawn.?

Key words: creep, shrinkage, stiffen framework, reinforced concrete, composite section

摘要： 本文针对分期浇筑的钢筋混凝土劲性骨架拱桥,提出了一个简捷的截面内力分布计算方法,采用Ｄｉｎｃｌｉｌｅｔ级数来表达徐变度和收缩变化,快徐变收缩的计算能采用递推方法进行,另外提出了不同性质钢筋混凝土组合截面单元的徐变等效荷载计算方法,使复杂的结构形成过程的徐义、收缩分析能在微机上迅速完成。通过对这类结构和一般钢筋混凝土结构的分析比较,结果很好．

关键词: 徐变, 收缩, 劲性骨架, 钢筋混凝土, 组合截面