中文摘要：

通过对北京地区某钢-混组合箱梁日照温度场的分析,探究组合梁桥的竖向、横向温度梯度曲线时程变化规律.与现行规范中的温度梯度进行对比,得出如下结论：混凝土板沿板厚方向的温差曲线为指数函数;钢箱梁沿竖向的温差曲线为多项式函数;组合梁横向梯度温度按指数函数分布,应考虑其作用效应;钢混组合梁规范中的竖向梯度温度和实际温度场存在一定程度不同,需要进一步改进.

英文摘要：

In this paper,the sunshine temperature field of steel-concrete composite girder in Beijing was analyzed,and the aim is to explore the variable regulation of the composite girder bridge ＇s vertical and horizontal temperature gradient curve. Then,after comparing with the current stander of the temperature gradient,a few conclusions are obtained： the temperature gradient curve of concrete slab along the thickness is exponential function while the temperature gradient vertical curve of steel box girder is polynomial functions; the transverse temperature gradient curve of the baseboard of steel box girder is an exponential function,it ＇s indispensable to be considered; It ＇s reasonable to make further improvement because the vertical gradient temperature curve of steel-concrete composite girder in the current standard is shapely different with the one in practice.