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

引用

Frontiers of Structural and Civil Engineering 2020年第4期14卷 867-887页

作者： Jianling HOU Weibing XU Yanjiang CHEN Kaida ZHANG Hang SUN Yan LI College of architecture and Civil Engineering Bejing University of TechnologyBejing 100124China School of Transportation Science and Engineering Harbin Institute of TechnologyHarbin 150090China

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.

关键词： long-span arch bridge expansion joint disease vehicle-bridge coupling vibration dynamic response

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