中文摘要：

根据热传导理论，建立哑铃形钢管混凝土拱日照温度分布的分析模型。该模型考虑气候条件、桥梁地理位置、方位、材料特性、结构尺寸等各种因素的影响。以有限元软件Ansys为平台，编制针对分析模型进行日照温度分布计算的有限元模块，对不同参数情况下的温度分布进行计算分析和比较研究。分析结果表明，在日照影响下，哑铃形钢管混凝土拱中会产生较大的非线性温差，一般情况下可高达25℃以上。影响截面温差大小的最主要因素是钢管混凝表面对太阳辐射的吸收率。

英文摘要：

On the basis of the heat transfer theory, an analytical model is established for predicting the nonlinear temperature distributions in dumbbell cross section concrete-filled steel tube （CFST） arches subjected to solar radiation. The model takes into account the effects of the climatic conditions, location, orientation, geometry and the material properties of the CFST arch. A computer program module employing the FEM software Ansys as its running platform is developed to implement this model numerically. Parametric studies are conducted to examine and discuss the effects of various parameters on the temperature distributions. The results indicate that the nonlinear difference in temperature over the cross sections due to solar radiation can be greater than 25 ℃ under average conditions. The solar radiation absorptivity of the steel tube surface is the most significant factor that affects the difference in temperature.