摘要
沥青混凝土是温度敏感型材料,对沥青面层进行力学分析时将温度变化考虑在内非常有必要。以有限元方法建立了沥青路面温度场计算模型,通过分析日最高温度、日最低温度、日太阳辐射量等对路面温度变化的影响,建立了沥青路面温度场预估方法。考虑常温和高温两种季节不同时刻的路面温度场,沿路面深度的温度变化选取沥青层材料参数,以多层弹性体系理论模型对沥青路面的受力状态进行了计算。结果表明沥青面层竖向压应变和竖向剪应变的最大值位于中上面层,而在全天气温最高的中午时段,最大竖向压应变和最大竖向剪应变都处于上面层。
It is necessary to consider the temperature change when mechanical analysis of asphalt pavement is applied because of the temperature sensitivity of asphalt concrete.Asphalt pavement temper-ature field calculation model in this paper is established by finite element method,and then asphalt pave-ment temperature field prediction method is established by analyzing the influence of the daily maximum temperature,daily minimum temperature and the amount of radiation.Considering pavement temperature field at room temperature and high temperature,asphalt material parameter is selected in the direction of depth to calculate model of stress of asphalt pavement by the elastic multilayer theory.The results show that the maximum value of vertical compressive strain and vertical shear strain are located in middle layer and upper layer,and in high temperature the maximum value are located in upper layer of asphalt pave-ment.
出处
《公路工程》
北大核心
2014年第1期73-77,共5页
Highway Engineering
基金
山东省自然科学基金(ZR2011EEQ027)
同济大学道路与交通工程教育部重点实验室开放基金(201002)
关键词
沥青路面
温度场
多层弹性体系
竖向压应变
竖向剪应变
asphalt pavement
temperature field
the elastic multilayer theory
vertical compres-sive strain
vertical shear strain
