湖南大学学报（自然科学版）2016，Vol.43Issue(11)：26-32,7.
钢桥面疲劳细节的车辆动力冲击响应研究∗
Vehicle-bridge Interaction Analysis of Orthotropic Steel Deck Bridge in Fatigue Details
摘要
Abstract
This paper studied the vehicle dynamic performance of orthotropic steel deck (OSD)bridge at fatigue details,based on a series of field tests on a 3 5 t 3-axle calibrated tractor across Fochen New Bridge (a three-span continuous steel box-girder OSD bridge)as well as finite element analysis.The re-sults of the field tests were first filtered to remove the noise signal.The strain range and cycle times of each strain gauge were then obtained by using rain flow method.The impact factors of fatigue details were eventually calculated.The research shows that in both the crawl case and general speed case,the OSD bridge has obvious vehicle-bridge coupling vibration.Due to the differences in local stiffness and geometric construction at each fatigue detail,the impact factors at each fatigue detail exhibit different values.For in-stance,the impact factors of steel deck,U-rib,and cut-out in diaphragm are 0.219,0.245,and 0.394,re-spectively,which are all larger than 0.15 specified by “Orthotropic Steel Bridge Design and Maintenance Guide”and AASHTO specification.Therefore,the current vehicle design specification underestimates the vehicle dynamic response of the OSD bridges.关键词
正交异性钢桥面/跑车试验/车桥耦合/冲击系数Key words
orthotropic steel deck/field test/vehicle-bridge interaction/impact factor分类
建筑与水利引用本文复制引用
张龙威,赵华,邵旭东..钢桥面疲劳细节的车辆动力冲击响应研究∗[J].湖南大学学报（自然科学版）,2016,43(11):26-32,7.基金项目
国家自然科学基金资助项目(51178178),National Natural Science Foundation of China(51178178) （51178178）
湖南省自然科学基金重点资助项目(BJJ2019) （BJJ2019）
