级配碎石基层沥青路面非线性力学响应分析

为了明确级配碎石柔性基层沥青路面结构层位功能,就沥青面层厚度、级配碎石基层厚度和模量三个路面结构参数对级配碎石柔性基层沥青路面非线性力学响应进行分析,结果表明：随着面层厚度增大,基层最大剪应力降低,且面层厚度为9cm时面层剪应力最不利,面层厚度为12cm时面层层底拉应力最不利;基层厚度对基层剪应力影响不显著,且当基层厚度为30cm时,面层剪应力、层底拉应力均出现最小值;随着基层模量的增大,面层最大剪应力、层底拉应力和基层最大剪应力均有不同程度降低.

Nonlinear Mechanical Response Analysis on Graded Broken Stone Base of Asphalt Pavement

To make sure the structural layer function of asphalt pavement with flexible base of graded bro- ken stone, nonlinear mechanical response of three parameters such as asphalt pavement thickness, bases＇ thickness of graded broken stone and modules of graded broken stone on asphalt pavement with the flexible base of graded broken stone are analyzed. The result shows that： along with the increasing of pavement thickness, the bases＇ maximum shearing stress decrease, the most unfavorable shearing stress and tensile stress is reached when the pavement thickness is 9cm, and the most unfavorable tensile stress is reached when the pavement thickness is 12cm; the pavement thickness doesn＇t affect bases＇ shearing stress significantly, meanwhile the minimum value of pavement shearing stress and layer bottom tensile stress are reached when the base thickness is 30cm; along with the increasing of the base＇ modulus, pavement＇ s maximum shearing stress, layer bottom＇s tensile stress and base＇s maximum shearing stress decrease at different degrees.