太阳辐射对山区桥梁高墩温度作用的影响  

Influence of Solar Radiation on Temperature Effect of High Pier of Bridge in Mountainous Area

作　　者：胡安庆[1] 邹春蓉[1] HU Anqing;ZOU Chunrong(China Railway Southwest Research Institute Co.Ltd.,Chengdu 611731,China)

机构地区：[1]中铁西南科学研究院有限公司,成都611731

出　　处：《铁道建筑》2021年第12期23-27,共5页Railway Engineering

摘　　要：根据天文学理论光线追踪方法构建了高墩太阳辐射分析模型,在模型中考虑了太阳辐射、环境、上部结构遮阴等主要因素,并以宜万(宜昌—万州)铁路马水河桥为例进行高墩温度分布分析和现场测试。研究结果表明:山区桥梁高墩温度场受气象、桥梁走向、周围山体影响较大,在合理考虑这些因素的情况下所建模型能较好地模拟出高墩的日照温度场,而得到的最不利温差计算值略大于实际值,用于分析温度作用效应是安全保守的。According to the ray tracing method of astronomical theory,the solar radiation analysis model of high pier was constructed.The main factors such as solar radiation,environment and superstructure shading were considered in the model.Taking Mashui River bridge on Yichang-Wanzhou as an example,the temperature distribution analysis and field test of high pier were carried out.The results show that the temperature field of high pier of bridge in mountainous area is greatly affected by weather,bridge trend and surrounding mountains.When these factors are reasonably considered,the sunshine temperature field of high pier can be well simulated.The calculated value of the most unfavorable temperature difference is slightly larger than the actual value,so it is safe and conservative to analyze the effect of temperature.

关 键 词：铁路桥梁 温度作用 高墩 日照 遮阴 模型 光线追踪方法 太阳辐射 

分 类 号：U24[交通运输工程—道路与铁道工程]