斜拉索抖振疲劳可靠度分析  

Buffeting fatigue reliability analysis of cable-stayed bridge

作　　者：卢伟[1] 强士中[1] 蒋永林[1] 

机构地区：[1]西南交通大学桥梁与结构工程系,四川成都610031

出　　处：《中国公路学报》2001年第4期63-66,共4页China Journal of Highway and Transport

摘　　要：为考虑大跨桥梁风振导致的构件疲劳问题 ,假定疲劳寿命服从威布尔分布 ,并考虑平均拉应力的影响 ,修正得到相应的疲劳可靠度公式 ;在桥梁抖振精细时程分析基础上 ,模拟出构件的应力时程 ,并以南京长江二桥为实例对公式进行了验证。In order to consider the fatigue problem of components in long span bridge induced by wind load,fatigue reliability formula is modified by assuming the fatigue life is accord with the weibull distribution and considering the effet of mean tension stress;Based on the accurate bridge buffeting analysis of time history,the time history of components is simulated and numerical example is presented to testify this method.

关 键 词：斜拉桥 斜拉索 抖振 疲劳可靠度 时程分析 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]