摘要
为分析温度场对季冻区沥青路面的影响,依托陕北延安的气温数据,采用ABAQUS有限元分析软件对冬季及夏季沥青路面面层结构温度场进行了模拟,研究了面层材料比热、热传导率以及太阳辐射和极端气温对沥青路面温度场的影响。结果表明:随着路面深度的增加,面层结构最高温度出现的时间依次滞后,而最低温度出现的时间无明显滞后;比热越大,温度变化的幅值越小,且上下限均向中间值靠拢;热传导率越小,温度变化的幅值越小,但下限并无明显变化;对于冬季无太阳辐射的情况,路面结构不同深度处的温度均有一定程度的降低,高温时段尤为明显;在温度传递性能上,沥青混合料在高温时传导热量的效应要比低温时强。
In order to analyze the influence of temperature field on asphalt pavement in seasonally frozen area,the temperature field of the asphalt pavement surface in winter and summer was simulated using ABAQUS based on the temperature data of Yan’an in northern Shaanxi,and the effects of specific heat,thermal conductivity,solar radiation and extreme temperature on the temperature field of asphalt pavement were studied.The results show that as the depth of the pavement increases,the showing of highest temperature on the surface structure is delayed,while the showing of lowest temperature has no obvious lag;the greater the specific heat,the smaller the amplitude of temperature change,and the upper and lower limits are closer to the middle value;the smaller the thermal conductivity,the smaller the amplitude of temperature change,and the lower limit does not change significantly;in the absence of solar radiation in winter,the temperature at different depths of the pavement structure is reduced to a certain extent,especially during high temperature periods;in terms of temperature transfer,the effect of heat conduction of asphalt mixture at high temperature is stronger than that at low temperature.
作者
张倩
马昭
张家伟
ZHANG Qian;MA Zhao;ZHANG Jia-wei(Shaanxi Engineering Laboratory of High Performance Concrete,Weinan 714000,Shaanxi,China;School of Civil Engineering,Xi’an University of Architecture and Technology,Xi'an 710055,Shaanxi,China;Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering,Xi'an 710055,Shaanxi,China)
出处
《筑路机械与施工机械化》
2020年第3期1-8,共8页
Road Machinery & Construction Mechanization
基金
陕西省高性能混凝土工程实验室2017年开放基金项目(SHPC201704)
陕西省交通运输厅交通科技项目(16-14k)
浙江省公路与运输管理中心科技计划项目(2019H01)
衢州市科技计划项目(2019K39)。
关键词
道路工程
沥青路面
季冻区
温度场
highway engineering
asphalt pavement
seasonally frozen area
temperature field
