摘要
过去50年内,全世界修建了300余座斜拉桥。由于斜拉索的防护技术不尽完善,斜拉桥在运营若干年后,不可避免地会出现斜拉索腐蚀问题。为保证桥梁安全运营,国内外一些斜拉桥不得不进行换索。通过对相关斜拉桥换索设计实例的调查研究,分析了斜拉桥常规换索设计的做法及其不足,借助索力优化理论和最小残数应变能原理,提出了改进换索设计的思路与方法,并通过换索工程实例初步验证了所提方法的合理性。
In the past 50 years,over 300 cable-stayed bridges have been built aroud the world.Due to the imperfect cable protective technique,cables may corrode after a bridge has served for a few years.To ensure the structural safety in running periods,the cables in the bridge have to be replaced.By means of case study on cable replacement,current design methods and their deficiencies were introduced.Based on cable forces optimization theory and minimal remnant energy principle,a modified method for cable replacement design was excogitated and proved to be reasonable after application in a bridge case.
出处
《结构工程师》
2010年第2期57-62,共6页
Structural Engineers
关键词
斜拉桥
换索
索力优化
设计
cable-stayed bridge
cable replacement
cable force optimization
design
