摘要
采用混凝土老化理论及中值理论 ,并考虑了混凝土的弹性后效及混凝土受四周约束作用的徐变特性 ,对任意形状截面的钢管混凝土拱桥的应力重分布进行研究 ,推出了短期荷载作用下截面应力和在长期荷载作用下应力重分布的半解析表达式 ,提出相应的分析方法及实施步骤。分析表明 ,徐变收缩对钢管混凝土拱桥的截面应力重分布影响非常显著 。
In this paper, the stress redistribution of arbitrary cross section of CFST arch bridge is researched based on the theory of aging of concrete and the theory of median, considering the elastic after working of concrete and the creep character of all around restrained concrete; the semi analytic expression of sectional stress under short time load and the stress redistribution under standing load is deduced; the analysis method and execution procedure are derived. The analysis shows that the effect of creep and shrinkage on the stress redistribution on CFST arch bridge is very obvious, and it should be recognized by the engineering circle.
出处
《桥梁建设》
EI
CSCD
北大核心
2001年第4期1-4,共4页
Bridge Construction
基金
国家自然科学基金 ( 5 0 0 6 80 0 1)
广西自然科学基金 ( 9912 0 0 2 )
关键词
拱桥
钢管混凝土结构
收缩徐变
应力分布
arch bridge
concret\|filled steel tube structure
shrinkage and creep
stress distribution