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为了研究温度对长大上坡路段沥青混凝土路面动力响应的影响规律,建立了一种移动荷载下长大上坡沥青混凝土路面动力响应模型,分析了温度对路面各动力响应参数的影响规律。结果表明:温度对长大上坡路段沥青混凝土路面动力响应影响很大;对于所研究的路面结构和坡度,在标准轴载作用下,当温度从10℃增加到30℃时,其面层底部纵向剪应变由65.61με增加到142.01με,横向剪应变由78.72με增加到175.13με,垂向压应变由-63.83με增加到-127.99με,远远大于面层底部的弯拉应变。过大的面层底部纵、横向剪应变和垂向压应变容易引起路面出现推移、拥包和车辙,在长大上坡路段路面设计时应充分考虑面层材料的耐高温性能和面层底部的抗剪强度。
In order to study the effect of temperature on the dynamic response of asphalt concrete pavement, the dynamic response model of asphaltic asphalt pavement is established under moving loads, and the influence of temperature on the dynamic response parameters of pavement is analyzed. The results show that the temperature has a great influence on the dynamic response of asphaltic concrete pavement on the ascending slope. For the studied pavement structure and slope, when the temperature is increased from 10 ℃ to 30 ℃ under the standard axial load, The shear strain increases from 65.61με to 142.01με, the transverse shear strain increases from 78.72με to 175.13με, and the vertical compressive strain increases from -63.83με to -127.99με, which is far greater than the bending strain at the bottom of the surfacing layer. Excessive vertical and horizontal surface shear stress at the bottom of the vertical and vertical strain easily lead to the passage of the bag, rudder and rutting in the uphill section of the pavement design should take full account of the surface temperature of the material properties and the bottom of the surface Shear strength.