基层材料及层位设置对沥青路面力学响应的研究

Study on the Influence of Base Material and Layer Position Setting on the Mechanical Response of Asphalt Pavement

为研究不同基层条件下沥青路面的结构力学响应,基于层状弹性体系理论,采用有限元分析软件,探明基层材料类型、基层层位设置对沥青路面力学响应的影响规律。结果表明,采用半刚性材料基层,沥青面层底部受压;采用柔性材料基层,沥青面层底部受拉;面层应力和基层模量呈负相关。半刚性、柔性材料组合的基层,沥青面层底部的受力状态仅与柔性材料设置的层位相关;半刚性基层受力状态与层位设置无关。

In order to study the structural mechanical response of asphalt pavement under different base conditions,based on the theory of layered elastic system,the finite element analysis software is used to find out the influence law of base material type and base horizon setting on the mechanical response of asphalt pavement.The results show that the bottom of the asphalt surface layer is in a state of compression and tension,corresponding to the semi-rigid material base and the flexible material base,respectively,which shows a negative correlation between asphalt surface bottom stress and base modulus.For the base of the combination of semi-rigid and flexible material,the stress state of the asphalt surface bottom is only related to the layer setting of the flexible material,while the stress state of the semi-rigid base is independent of the layer setting.