中文摘要：

钢-混组合桥面系结构形式特殊,与之对应的竖向温度梯度有别于其他组合结构。为明确现行标准关于钢-混组合结构桥面系的竖向温度梯度效应的计算差异,为后续相关研究提供可靠参考,以某实桥钢-混组合桥面系为例,借助ANSYS有限元程序,建立精细化有限元计算模型,对现行标准的正温差及负温差的竖向温度梯度模型、参数取值及效应值进行对比。结果表明：现行技术标准关于钢-混组合桥面系的竖向温度梯度模型及参数取值差异明显,可根据实际要求及应用对象,对现行技术标准进行优化;正温差状态下,依据美国AASHTO（1994版）标准可获得混凝土桥面板及钢桁梁的最大拉压应力;负温差状态下,基于中国JTG D62—2004则可获得混凝土桥面板的最大拉压应力;参考欧洲BSI 1990-2-10,则无论是正温差还是负温差状态,工字梁及钢桁梁均可获得最大拉压应力。

英文摘要：

To the steel-concrete composite deck system,which is a kind of special structure,the vertical temperature gradient has an obvious difference with other composite structures. In order to distinguish the difference for the vertical temperature gradient effect of steel-concrete composite bridge deck with applicable codes,and provide a valuable reference for the followed research,a steel-concrete composite bridge deck in some bridge was taken as the studying case. With FEM software ANSYS,a finite element model was built,some researches on the calculation model,parameters and the effect of the vertical temperature gradient based on current codes were conducted. The results indicated that the difference of the calculation model and parameters between the applicable codes was so obvious,which should be optimized according to actual requirement and application. For positive temperature difference,the biggest tensile-compressive stress of concrete deck and steel truss girder could be obtained according to AASHTO（ 1994） code. For negative temperature difference,the biggest tensile-compressive stress of concrete deck could be obtained according to Chinese code JTG D62—2004. Both for positive and negative temperature difference,the biggest tensile-compressive stress of I-beam could be obtained by code BSI 1990- 2- 10.