Typical diseases of a long-span concrete-filled steel tubular arch bridge and their effects on vehicle-induced dynamic response

作     者：Jianling HOU Weibing XU Yanjiang CHEN Kaida ZHANG Hang SUN Yan LI Jianling HOU;Weibing XU;Yanjiang CHEN;Kaida ZHANG;Hang SUN;Yan LI

作者机构：College of Architecture and Civil EngineeringBejing University of TechnologyBejing 100124China School of Transportation Science and EngineeringHarbin Institute of TechnologyHarbin 150090China 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2020年第14卷第4期

页      面：867-887页

核心收录：

学科分类：081406[工学-桥梁与隧道工程] 08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

基　　金：This research was supported by the National Natural Science Foundation of China(Grant Nos.51908015,51978021) National Key Research and Development Program of China(Grant Nos.2017YFC1500604,2017YFC1500603) Beijing Municipal Education Commission(Nos.KM201910005020,IDHT20190504) the Basic Research Fund of Beijing University of Technology(No.004000546318524) 

主　　题：long-span arch bridge expansion joint disease vehicle-bridge coupling vibration dynamic response 

摘      要：A long-span concrete-filled steel tubular(CFST)arch bridge suffers severe vehicle-induced dynamic responses during its service ***,few quantitative studies have been reported on the typical diseases suffered by such bridges and their effects on vehicle-induced dynamic ***,a series of field tests and theoretical analyses were conducted to study the effects of typical diseases on the vehicle-induced dynamic response of a typical CFST arch *** results show that a support void results in a height difference between both sides of the expansion joint,thus increasing the effect of vehicle impact on the main girder and *** impact factor of the displacement response of the main girder exceeds the design *** variation of the suspender force is significant,and the diseases are found to have a greater effect on a shorter *** theoretical analysis results also show that the support void causes an obvious longitudinal displacement of the main girder that is almost as large as the vertical *** support void can also cause significant changes in the vehicle-induced acceleration response,particularly when the supports and steel box girder continue to collide with each other under the vehicle load.