典型半刚性沥青路面结构车辆荷载动力响应指标分析和应用.doc

典型半刚性沥青路面结构车辆荷载动力响应指标分析和应用 　　摘要：沥青路面结构使用寿命不足是目前中国沥青路面在运营使用过程中存在的普遍现象，现有的沥青路面结构设计体系无法有效地反映实际交通荷载下路面结构力学行为是其重要原因之一。目前我国的的沥青路面设计方法中，把车辆荷载视为静荷载或者近似等效静荷载，路面结构是为弹性体系结构。随着高速公路建设的发展，高速公路运输实现高速重载化。车辆运行速度越高，车辆震动越大，车辆对路面的振动冲击荷载越大。运载重量越大，路面承受荷载越高，尤其是在夏天高温状态下，沥青路面表现出严重的黏弹性。路面设计中仍使用静载模式已不能反应路面的实际受力状况，无法解释动态荷载作用下路面结构产生的各种现象。因此，对于研究重型车辆作用下沥青路面承受的动荷载及路面结构产生的各种动力响应，具有一定的现实意义。下面本文仅提出自己在沥青路面结构设计的一点建议，以供参考。 　　关键词：典型半刚性沥青路面荷载动力响应分析与应用 　　中图分类号：U416.217文献标识码：A 文章编号： 　　Abstract: the asphalt pavement structure service life is Chinas lack of asphalt pavement use in operation of the existence of the common phenomenon, the existing the asphalt pavement structure design system cant effectively reflect actual traffic load pavement structure mechanics behavior is under the important reasons. At present our country of the asphalt pavement design method, the vehicle load as static load equivalent or similar to the static load, pavement structure is for elastic system structure. Along with the development of the highway construction, highway transportation ChongZaiHua realize high speed. The running speed of the vehicle, the higher the vehicle vibration, the road vehicle vibration impact load is bigger. Carry weight, the greater the pavement bear loads is high, especially in summer high temperature condition, the asphalt pavement show serious sticky elastic. Pavement design still use static load model has not reflect the actual stress condition, can not explain the dynamic load pavement structure to produce a variety of phenomena. So, for the heavy vehicles under the action of the asphalt pavement under dynamic loading and road surface structure to produce a variety of dynamic response, has some of the realistic significance. This paper put forward the only in the asphalt pavement structure design to a bit of advice for your reference. 　　Keywords: typical semi-rigid asphalt road surface load dynamic response analysis and application 　　 　　 　　常用沥青路面设计方法介绍 　　 路面的结构由路基、垫层、基层和面层组成。面层是道路工程中直接承受荷载