摘要
针对苏通大桥斜拉索疲劳使用寿命达到50年的要求,对斜拉索进行拉弯疲劳试验研究,以验证斜拉索设计与制作工艺能否满足要求。在分析国内外斜拉索拉弯疲劳试验状况和苏通大桥斜拉索拉弯疲劳试验参数的基础上,利用先进的大型桥梁缆索试验系统对试验索进行200万次拉弯疲劳试验研究。试验结果表明,苏通大桥斜拉索疲劳使用寿命能够满足设计要求。
Aiming at the requirement for 50-year fatigue service life of stayed cables in Sutong Bridge,this paper carries out the stretch bending fatigue test study on stayed cables in order to verify whether the design and fabricating technology of stayed cables can satisfy requirements or not.Based on the analysis of stretch bending fatigue test situations of domestic and overseas stayed cables and stretch bending fatigue test parameters of stayed cables in Sutong Bridge,the paper studies the tested cables by performing 2 million stretch bending fatigue tests by utilizing advanced large-scale bridge cables.The test result indicates that the fatigue service life of stayed cables in Sutong Bridge is satisfied with design requirements.
出处
《公路交通技术》
2010年第4期73-76,共4页
Technology of Highway and Transport
基金
国家科技支撑项目(2006BAG04B02)
关键词
斜拉索
拉弯疲劳
试验参数
弯曲应力
stayed cable
stretch bending fatigue
test parameter
bending stress
