基于气象因素的混凝土温度场特性研究  

Research on Concrete Temperature Field Characteristics Based on Meteorological Factors

作　　者：郁培云 张驰 李书明 刘竞 郑新国 YU Peiyun;ZHANG Chi;LI Shuming;LIU Jing;ZHENG Xinguo(Railway Engineering Research Institute,CARS,Beijing 100081,China;State Key Laboratory for Track Technology of High-speed Railway,Beijing 100081,China;CARS,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081 [2]高速铁路轨道系统全国重点实验室,北京100081 [3]中国铁道科学研究院集团有限公司,北京100081

出　　处：《铁道建筑》2025年第3期134-138,共5页Railway Engineering

基　　金：国家重点研发计划(2022YFB2603305);中国铁道科学研究院集团有限公司基金(2022YJ131)。

摘　　要：为研究混凝土在气象因素作用下的温度场特性,在哈尔滨市通过环境实测的方法,统计分析了混凝土温度场的影响因素及变化规律。结果表明:混凝土温度场受气温和太阳辐射强度影响明显,夏季高温时呈正温度梯度,冬季呈负温度梯度。气温和太阳辐射强度对混凝土表层8 cm范围内温度影响显著,对15~42 cm深度处温度的影响则随着混凝土深度的增加逐渐降低。风速主要影响混凝土表层温度与气温的差值,相对湿度对混凝土温度场的影响不大。混凝土内最大温差为表层2 cm与42 cm深度处,夏季最大温差为18.7℃;冬季最大负温差为-7.9℃。To study the temperature field characteristics of concrete under meteorological factors,the influencing factors and variation laws of concrete temperature field were statistically analyzed through environmental measurement in Harbin city.The results show that the temperature field of concrete is significantly affected by temperature and solar radiation intensity,with a positive temperature gradient during high temperatures in summer and a negative temperature gradient during winter.The temperature and solar radiation intensity have a significant impact on the temperature within a range of 8 cm on the surface layer of concrete,while the impact on the temperature at a depth of 15~42 cm gradually decreases with the increase of concrete depth.Wind speed mainly affects the difference between the surface temperature of concrete and the air temperature,while relative humidity has little effect on the temperature field of concrete.The maximum temperature difference inside the concrete is at a depth of 2 cm and 42 cm in the surface layer,with a maximum temperature difference of 18.7℃in summer,while the maximum negative temperature difference in winter is-7.9℃.

关 键 词：混凝土 温度场 温差 太阳辐射 气温 风速 

分 类 号：U213.244[交通运输工程—道路与铁道工程]