摘要
目前混凝土拱的徐变影响还未引起人们的足够重视,钢管混凝土拱属于组合材料拱桥,徐变对内力的影响较大,本文在不考虑体系内力重分布的情况下,提出了钢管混凝土拱桥由于徐变产生的截面内力重分布计算方法,该方法简单实用,易于掌握,计算结果表明:钢管混凝土拱桥徐变产生的应力重分布值较大,设计时应予以足够的重视。
Presently the crep of the concrete arch bridge is not considerably considered by engineers. The concrete-filled steel tube arch bridge is a composite material arch bridge. The effects of creep of concrete-filled steel tube arch bridges are considerable on the cross-sectional internal force. This paper puts forward a computation moth'od of the cross-sectional internal force of the concrete-filled steel tube arch bridge that is produced by the creep of the core concrete. In this methord the effect of the system internal force redistribution of the concrete-filled steel tube arch bridge is not considered. The computation method is considerably simple and easily mastered for designers. The result of computation shows that the redistributed intenal force is considerably large.
关键词
钢管混凝土
拱桥
徐变
截面
内力
concrete-filled steel tube arch bridge
creep
internal force
redistribution
useful simplified computation
