The fatigue analysis on orthotropic steel bridge decks is a hot topic in bridge engineering field. This study provides one method for fatigue analysis under the combined actions of vehicle loads and pavement temperature. To be specific, taking the steel bridge deck of one cable-stayed bridge as a research object, this study proposes a method of calculating life-cycle fatigue damage of orthotropic steel deck under the combined actions of vehicle loads and pavement temperature. First, a finite element model of steel bridge deck with asphalt pavement is built to analyze the influence of pavement temperature on the fatigue stress of steel bridge deck. Second, a simulation method of fatigue stress caused by random vehicle loads is proposed. Finally, a method of calculating the life-cycle fatigue damage of welded joints under the combined actions of vehicle loads and temperature is proposed. The results show that temperature has a significant effect on fatigue damage, and the cumulative fatigue damage in the rib-to-rib welded joint is significantly greater than that in the deck-to-rib welded joint. The results can provide meaningful references for bridge engineers to carry out fatigue analysis on orthotropic steel bridge decks.

中文翻译：

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车辆荷载与路面温度共同作用下正交异性钢桥桥架生命周期疲劳损伤的计算方法

正交异性钢桥面板的疲劳分析是桥梁工程领域的热门话题。这项研究提供了一种在车辆载荷和路面温度共同作用下进行疲劳分析的方法。具体来说，以某斜拉桥的钢桥面为研究对象，提出了一种在车辆荷载和路面温度共同作用下正交各向异性钢桥面生命周期疲劳损伤的计算方法。首先，建立了沥青路面钢桥面板的有限元模型，分析了路面温度对钢桥面板疲劳应力的影响。其次，提出了一种随机载荷引起的疲劳应力的仿真方法。最后，提出了一种在车辆载荷和温度共同作用下计算焊接接头生命周期疲劳损伤的方法。结果表明，温度对疲劳损伤有显着影响，肋骨-肋骨焊接接头中的累积疲劳损伤明显大于甲板-肋骨焊接接头中的累积疲劳损伤。研究结果可为桥梁工程师进行正交异性钢桥面板疲劳分析提供有意义的参考。