Based on the reinforcement and reconstruction project of steel deck of Yichang Yangtze River Bridge,the stress variation law of fatigue fragile details of composite deck under different tempera-tures was analyzed by finite element calculation.The results show that compared with the traditional asphalt steel bridge deck,the steel-UHPC light composite bridge deck can reduce the stress amplitude of fatigue details and improve the fatigue resistance of the steel bridge deck without increasing the dead load of the bridge.Under different temperatures,compared with the traditional asphalt steel bridge deck,the stress of fatigue vulnerable details of the steel-UHPC light composite bridge deck de-creases by 15％～46％.
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