随机车流下佛陈扩建桥组合桥面板的疲劳性能评价  

FATIGUE EVALUATION OF COMPOSITE BRIDGE DECK OF FOCHEN EXPANSION BRIDGE UNDER RANDOM TRAFFIC FLOWS

作　　者：祝志文[1] 黄炎[1] 王甜[2] 文鹏翔 向建军[2] 

机构地区：[1]湖南大学土木工程学院,长沙410082 [2]湖南省交通规划勘察设计院,长沙410008

出　　处：《钢结构》2016年第11期31-37,共7页Steel Construction

基　　金：湖南省交通厅科技项目(201522);国家重点基础研究发展计划(2015CB057701;2015CB057702);国家自然科学基金项目(51278191)

摘　　要：为研究组合桥面板的疲劳性能,开展随机车流作用下佛陈扩建桥几个构造细节的应力监测,获得构造细节的应力记录;确定对应的等效应力幅和加载次数,进行构造细节的疲劳性能评价。分析表明:纵肋-面板构造细节和弧形切口构造细节在随机车流作用下的最大和等效应力低于常幅疲劳极限,疲劳性能满足无限寿命设计要求。Stress monitoring of several fatigue categories on the Fochen Expansion Bridge under random traffic flows was carried out so as to investigate the fatigue performance of composite bridge decks. The recorded stress time histories on the categories were analyzed to obtain effective stress range and loading cycle,and finally to evaluate their fatigue performance.The results showed that the recorded maximum and effective stress ranges at the rib-to-deck and cutout details were lower than the constant amplitude fatigue limits,which guaranteed the design requirements of infinite life.

关 键 词：疲劳 正交异性桥面板 组合铺装 应力监测 

分 类 号：U441.4[建筑科学—桥梁与隧道工程] U443.31[交通运输工程—道路与铁道工程]