【摘要】 以热传导理论结合有限元方法,提出了圆形钢管混凝土拱肋日照温度分布的分析模型,考虑了太阳辐射、气温变化、地理位置、方位和几何尺寸等对温度分布的影响。结果表明,拱肋横截面内的日照非线性温差可达20℃以上,说明应对钢管混凝土拱桥的温度效应予以重视。更多还原

【Abstract】 By means of the heat conductivity theory and finite element method,an analytic model is developed for sunshine temperature distribution in the circular concrete-filled steel tube(CFST) arch rib,in which several factors having influences on the temperature distribution,such as solar radiation,temperature variations,locations,directions and geometric dimensions,have been considered.The results of analysis and study in the paper indicate that the nonlinear sunshine temperature differentials in the cross section of the arch rib can be greater than 20 ℃ and due attention should be paid to such temperature effect on the CFST arch bridges.更多还原