为研究各风速场下温度对大跨度混凝土变截面连续梁桥轴向应力的影响，提出根据桥梁顶板厚度不一致分别计算竖向温度梯度，并用谱解法模拟横向脉动风速场。首先，通过采用混凝土热传导方程、日最高最低温度、变截面连续梁桥顶板厚度计算竖向温度梯度变化及变化深度；其次，通过Midas Civil进行桥梁建模并采用中国规范标准静活载模拟列车移动荷载；最后，对桥梁施加静阵风荷载和脉动风荷载。结果表明：基于采用混凝土热传导方程、日最高最低温度和变截面连续梁桥顶板厚度得到的竖向温度梯度变化及变化深度的方法，得到的左右车道轴向应力要比现有的研究要大；当桥梁处在同一种风速场模型下，梯度升温下对桥梁的危害最大、梯度降温次之、无温度变化最低；当桥梁呈同一种温度模型时，脉动风荷载时的桥梁轴向应力和轴向应力幅度都比无风和静态风要更大更急，对桥梁的危害也更大。研究成果可为大跨度混凝土变截面连续梁桥的结构设计以及安全运营提供参考。

To investigate the impact of temperature on axial stress in large-span concrete variable-section continuous beam bridges under various wind speed fields, a method was proposed to calculate vertical temperature gradients separately based on inconsistent deck slab thickness and simulate lateral fluctuating wind speed fields using the spectral method. Firstly, vertical temperature gradient variations and their depths were calculated by employing the concrete heat-conduction equation, daily maximum and minimum temperatures, and deck slab thickness of the variable-section continuous beam bridge. Secondly, bridge modeling was performed using MIDAS Civil, and ZKH standard static live loads were simulated to represent moving train loads. Finally, static array wind loads and pulsating wind loads were applied to the bridge. The results indicate that the axial stresses in the left and right lanes obtained from the proposed method, which uses vertical temperature gradients and their depths derived from the concrete heat-conduction equation, daily temperature extremes, and bridge deck slab thickness, are larger compared to existing studies. Under the same wind speed field model, the harm to the bridge is greatest under gradient heating, followed by gradient cooling, while no temperature change results in the least impact. When the bridge is subject to the same temperature model, both the axial stress values and amplitudes of the bridge under pulsating wind loads are larger and more severe than those under no wind or static wind conditions, posing greater hazards to the bridge. The research findings can provide references for the structural design and safe operation of large-span concrete variable-section continuous beam bridges.