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Research and Application of High Performance Bridge Structures Toward Future(PDF)


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Research and Application of High Performance Bridge Structures Toward Future
SHAO Xu-dong CAO Jun-hui
Key Laboratory for Wind and Bridge Engineering of Hunan Province, Hunan University
bridge engineering technical bottleneck ultra-high performance concrete (UHPC) high performance bridge structure research and application
In order to overcome the common technical problems of concrete bridges, steel bridges, and steelconcrete composite bridges, and to improve the performance and quality of bridge structures, the research group at Hunan University developed the high performance bridge structure system based on ultra-high performance concrete (UHPC) technology. Four types of high performance bridge structures were developed: ①steel-STC lightweight composite deck, in which STC denoted a kind of UHPC specially developed for orthotropic steel decks; ②steel-UHPC waffle deck lightweight composite girder; ③thin-wall UHPC continuous girder bridge with only longitudinal prestress; ④fully prefabricated UHPC city bridges facilitating rapid erection.Based on a great number of static and fatigue tests, the research group revealed the basic mechanical performance of the high performance bridge structures, and developed calculation theory and design method for them. The steel-STC lightweight composite deck was applied to 17 real bridges in China, and the application covered the four basic bridge types, i.e., girder bridge, arch bridge, cablestayed bridge, and suspension bridge. A typical pilot project is the 2nd Dongting Lake Bridge in Yueyang, Hunan. All of these bridges are in good service states, without any damage developed in STC. To sum up, since the high performance bridge structures have the potential of overcoming technical bottlenecks in conventional bridges, they should have a promising future.



Last Update: 2017-09-11