桥面铺装温度对正交异性钢桥面板疲劳的影响  

Influence of Pavements Temperature on Fatigue Life of Orthotropic Deck of Steel Bridge

作　　者：吴冲[1] 刘海燕[1] 张志宏 孙一鸣[3] 

机构地区：[1]同济大学桥梁工程系,上海200092 [2]宁波天意钢桥面铺装技术有限公司,浙江宁波315042 [3]上海市政工程设计研究院总院(集团)有限公司,上海200092

出　　处：《同济大学学报（自然科学版）》2013年第8期1213-1218,共6页Journal of Tongji University:Natural Science

基　　金：国家"九七三"重点基础研究发展规划(2013CB036303);交通运输部科技项目(2009 318 000 1070)

摘　　要：通过带桥面铺装的正交异性钢桥面板足尺模型疲劳试验,实测了不同桥面铺装温度条件下钢桥面板的受力,分析了桥面铺装温度对钢桥面板疲劳损伤度的影响.结果表明:沥青混合料钢桥面铺装刚度随着温度升高迅速降低,导致铺装层下的正交异性钢桥面板受力迅速增加;在相同的荷载条件下,高温(55℃)条件下钢桥面板疲劳损伤度约为常温(10℃)的21倍.Stresses of the steel bridge deck were measured through fatigue test with full-scale orthotropic deck specimen model under different temperature conditions.The results show that the stiffness of the asphalt mixture reduces quickly with the increasing of temperature,which results in rapid increasing of stresses of orthotropic deck of steel bridge under the pavement.The fatigue damage of the steel deck of bridge at high temperature(about 55℃) is approximately 21 times that at normal temperature(about 10℃) under the same load conditions.

关 键 词：正交异性钢桥面板 钢桥疲劳试验 损伤度 桥面铺装温度 

分 类 号：U443.3[建筑科学—桥梁与隧道工程]