关键词: 道路工程, 隔裂夹层, 复合式路面, 动力响应, 黏弹性人工边界

Abstract: The anti-reflection-crack technology of graded gravel has a good effect on preventing the reflection crack of “white to black” pavement.The micro-bonded graded gravel was applied in the structure of “white to black” pavement.In order to study the dynamic response of composite pavement with anti-cracking interlayer under the moving constant load，a three-dimensional finite element model of asphalt overlay with anti-cracking interlayer was developed by ABAQUS.And the visco-elastic artificial boundaries were adopted in the model.The analysis results indicate that：the dynamic response of asphalt overlay can be significantly reduced by setting the micro-bonded graded gravel interlayer.According to the change rules of the maximum principal stress and the maximum shear stress at the joint bottom of asphalt layer，the asphalt overlay thickness of the interlayer is suggested to be 15cm.It can be more effective in anti-cracking，if the interlayer is set on the bottom layer with a better stiffness.The dynamic response of the asphalt overlay can be influenced by the modulus of the interlayer，to some extent.The minimum shear stress of the surface can be reached under the best modulus which is about 584 MPa.The thickness of the interlayer has little influence on the bottom layer shear stress of asphalt pavement，and the thickness of the interlayer is suggested to be 15 cm.

Key words: highway engineering, anti-cracking interlayer, composite pavement, dynamic response, visco-elastic artificial boundary