不同季节影响下复合道面力学响应分析

Analysis on Mechanical Response of Composite Pavement under Different Seasonal Effects

为了研究复合道面在不同季节时的力学响应,以中原地区某机场改造项目为项目背景,借助三维有限元软件,建立了道面有限元模型,分析了复合道面在温度影响下的力学响应,并与机场监测数据进行对比,验证了模型的准确性。研究发现:大气温度所能影响的道面深度范围在0.56 m以内,和大气温度相比,道面面层温度峰值远大于气温峰值;道面内部不同结构层之间温度变化趋势相同,随着道面深度的加深,温度峰值逐渐递减,并且出现时间具有延迟现象;在不同季节,道面在相同机型作用下所产生的变形不同,说明温度对于道面的受力是有影响的,其中混凝土层在冬季时所产生的应变值比夏季所产生的减少约74%,变化比较明显。

In order to study the mechanical response of composite pavement in different seasons,taking an airport reconstruction project in the Central China as the project background and using the three-dimensional finite element software,a finite element model of pavement is established to analyze the mechanical response of composite pavement under the influence of temperature.Compared with the airport monitoring data,the accuracy of the model is verified.The study has found that the depth range of the pavement affected by the atmospheric temperature is within 0.56 m.Compared with the atmospheric temperature,the peak temperature of the pavement is much greater than the peak temperature.The temperature variation trend between the different structural layers within the pavement is same.With the deepening of the pavement depth,the temperature peak gradually decreases,and there is a time delay phenomenon.In the different seasons,the deformation of the pavement caused by the same aircraft type is different,which indicates that the temperature has an impact on the stress on the pavement,and in which the strain value generated by the concrete layer in winter is reduced by about 74%compared to that in summer.The change is greatly obvious.