Taking the main bridge of the Wuhai Yellow River Bridge of Baotou-Yinchuan High-speed Railway as an example,this study explored the application of UHPC(Ultra-High Performance Concrete)as a new type of steel bridge deck pavement in areas with large temperature difference,in terms of the influences of temperature forces,structural performance,effects on bridge stiffness and rail smoothness,as well as durability and economy.The results show that:(1)In areas with large temperature difference,the pavement layer of the steel-concrete composite bridge and the temperature condition stress of the shear connectors are at least 36%and 11%,respectively,of the maximum value of the most unfavorable combined stress.(2)The UHPC steel bridge deck pavement shows good structural performance and the design scheme can meet the structural stress requirements.(3)The UHPC steel bridge deck pavement can effectively improve the overall stiffness of the bridge and the smoothness of the track,with the main span live load deflection and track irregularity values decreasing by more than 3.8%and 13.1%,respectively.(4)The UHPC steel bridge deck pavement can effectively enhance the durability of the bridge's steel deck and offers good economic advantages.(5)The UHPC steel bridge deck pavement can be further promoted and applied in the construction of high-speed railway steel bridges in areas with large temperature difference.
high-speed railwayUHPC pavementapplication researcharea with large temperature differencesteel bridge deckcomposite box girder cable-stayed bridge
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