Static and Fatigue Performance Analysis of Steel-STC Combined Bridge Deck Slabs
Traditional orthotropic steel bridge deck structures are prone to fatigue cracking,and ultra-high-performance concrete incorporated with steel fibers can improve the stiffness and durability of the bridge deck structure and alleviate the fatigue cracking problem due to its excellent toughness and tensile strength.However,quantitative analysis of the differences in the performance of bridge decks considering ultra-high performance concrete as a structural layer and traditional orthotropic anisotropic bridge decks in conjunction with practical engineering is still lacking.Therefore,the refined finite element model of segmental box girder was established in the background of a bridge in Beijiang,Qingyuan,to quantitatively analyze the difference in static force and fatigue of the bridge deck structure with the participation of ultra-high-performance concrete layer in the force on the structure of the pure steel bridge deck and the structure of the steel-STC combination bridge deck.The results show that the laying of ultra-high performance concrete layer can significantly improve the stiffness of the main girder,reduce the top plate stress of the box girder,and basically eliminate the fatigue cracking problem of the steel bridge deck.
long span cable-stayed bridgesteel-STC composite bridge deckrefined finite element modelstatic analysisfatigue performance analysis
NETL
NSTL
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