热沥青摊铺在桥梁结构中引起的温度变化是一个瞬态现象，准确监测具有一定难度。为研究钢-混凝土组合梁在热沥青摊铺下的温度场，通过现场实测和有限元数值模拟相结合的方法，研究了热沥青摊铺下钢-混凝土组合梁的温度分布规律，并通过参数分析的方法得到了由热沥青摊铺引起的竖向温差预测公式。研究表明：热沥青摊铺对钢-混凝土组合梁的影响深度主要在0.5m以内，并形成了较大的竖向温度梯度。竖向温差模式可近似用指数函数来描述，横向温差模式可近似用正弦函数来描述。其中竖向最大温差主要和梁体初始温度T0、中面层厚度d以及沥青拌合料温度Ts有关。提出的竖向温差预测公式的计算结果与已有研究相符，为热沥青摊铺下钢-混凝土组合梁温度场的研究提供了参考。

Temperature fluctuations caused by hot asphalt paving on bridge structures represent a transient process that is challenging to monitor precisely. In order to investigate the temperature field of steel-concrete composite beams during asphalt high-temperature paving. By combining field measurements and finite element numerical simulations, the temperature distribution pattern of steel-concrete composite beams under asphalt high-temperature paving was investigated. A predictive formula for vertical temperature differences caused by asphalt high-temperature paving was proposed by utilizing a parameter analysis method. The research results indicated that the influence depth of asphalt high-temperature paving on steel-concrete composite beams mainly occurred within a range of 0.5 m and formed a large vertical temperature gradient. The vertical temperature difference pattern can be approximated by an exponential function, while the horizontal temperature difference pattern can be approximated by a sine function. The maximum vertical temperature difference is mainly influenced by the initial temperature of the beam T0, the thickness of the intermediate layer d, and the temperature of the asphalt mixture Ts. The calculated results from the proposed vertical temperature difference prediction formula are consistent with existing research. Provided a reference for studying the temperature distribution of steel-concrete composite beams during asphalt hot-mix paving.

国家重点发展研究计划发展计划(973)项目(2015CB057702)；国家自然科学(项目编号:52078059)