Abstract: In order to analyze the stress of viscoelastic pavement under the condition of interlayer contact, the finite element analysis model was established by taking the simply supported box girder bridge as an example. And the mechanical response of pavement under different asphalt layer thickness, different bond layer thickness and different contact cohesive force was analyzed under horizontal impact load. The results show that under the condition of interlayer contact, the maximum value of lateral stress of pavement layer appears at the edge of load area, and the minimum value appears at the center of load area. Increasing the thickness of asphalt layer will increase the longitudinal tensile stress of asphalt layer, but it can improve the appearance of unstable ruts. Increasing the thickness of the bond layer will reduce the longitudinal and transverse tensile stress of the pavement layer, but it has little effect on other stresses and deformation of the pavement layer. The change of contact cohesion between asphalt layer and bonder layer has little influence on the stress. When the cohesion is greater than 0.01MPa, the stress of each layer remains unchanged.

Key words: bridge engineering, deck pavement, box girder, interlayer contact, viscoelastic, finite element analysis

摘要： 为了分析黏弹性铺装层在层间接触条件下的应力情况，以简支箱梁桥为例建立了有限元分析模型，通过水平冲击荷载加载，分析了在不同沥青层厚度、不同黏结层厚度以及不同接触黏聚力下铺装层的力学响应。结果表明：在层间接触条件下，铺装层横向位置应力最大值出现在荷载区域边缘，最小值则出现在荷载区域中心；增加沥青层厚度会增大沥青层纵向拉应力，但是能改善路面失稳型车辙的出现；增加黏结层厚度会减小铺装层纵横拉应力，但是对铺装层其它应力以及变形影响较小;沥青层与黏结层间接触黏聚力的改变对应力影响较小，当黏聚力大于0.01 MPa时，各层受力均保持不变。

关键词: 桥梁工程, 桥面铺装, 箱梁, 层间接触, 黏弹性, 有限元分析