结构工程师2011，Vol.27Issue(2)：84-89,6.
基于实测的苏通大桥疲劳寿命评估
Fatigue Evaluation of Sutong Bridge Based on Actual Measurement
摘要
Abstract
Through analyzing measured strain-time data of typical fatigue places on Sutong bridge, this paper studies its stress spectrum characters under daily traffic and predicts its fatigue life. Measured strain time-data shows that at most times its strain is below 40 με, but instantaneous strain can reach 120 μe when heavy trucks pass the bridge. Through analyzing stress spectrum, it can be seen that roof of the box girder and cablegirder anchor box own higher stress level. Using nominal stress method, the shortest fatigue life of box girder of Sutong bridge is 188 years and the most dangerous place locates at the weld joint of roof and U-shaped rib.In sum, Sutong bridge won' t occur fatigue failure under present tratfie and structure situation.关键词
桥梁工程/疲劳分析/实测应力时程/实测应力谱/钢箱梁Key words
bridge engineering/ fatigue analysis/ measured strain time-data/ measured stress spectrum/ steel box-girder引用本文复制引用
曹硕,张启伟..基于实测的苏通大桥疲劳寿命评估[J].结构工程师,2011,27(2):84-89,6.基金项目
国家科技支撑计划项目(2006BAG04B01) （2006BAG04B01）
