移动非均布荷载作用下的沥青路面动力响应分析  

Analysis on the Dynamic Response of Asphalt Pavement Under Non-uniform Distributed Moving Load

作　　者：翟忠伟 

机构地区：[1]河北省高速公路张涿保定管理处,河北保定071000

出　　处：《工程建设与设计》2018年第1期87-88,共2页Construction & Design for Engineering

摘　　要：为更准确地模拟沥青路面实际的受力状态,基于弹性层状理论,论文借助大型有限元分析软件ANSYS建立了沥青路面三维有限元黏弹性模型。通过对模型施加非均布垂直和切向摩擦作用,分析了车辆在匀速行驶的状况下,沥青路面在不同载重车辆荷载的动力响应。结果表明,最大正向纵向拉应力位于基层层底,最大负向纵向压应力位于沥青面层。最大拉应力为0.017MPa,远小于容许拉应力0.081MPa,超载并不是造成路面损坏的唯一因素。For a more accurate simulation of asphalt pavement actual stress state, Based on the elastic layered theory, using finite element analysis software ANSYS to establish the asphalt pavement three-dimensional finite element viscoelastic model,and apply the combined effect of non-uniformly distributed vertical and friction tangential behavior, to analysis the dynamic response of asphalt pavement under different of vehicle loads when the vehicle is in uniform motion. The results indicate that the maximum positive-going longitudinal tensile stress is in the intermediate section of the sub-base, the maximum negative-going longitudinal compressive stress is in the asphalt pavement surface. Maximum tensile stress 0.017 Mpa is much smaller than the allowable tensile stress0.081 Mpa. Overloading is not the only factor causing pavement damage.

关 键 词：沥青路面 有限元 移动荷载 超载率 

分 类 号：U416.217[交通运输工程—道路与铁道工程]