超载和层间滑动对半刚性基层沥青路面结构损坏机理研究

Damage Mechanism Research of Semi-rigid Asphalt Pavement on Overloading and Interlayer Sliding

对现有半刚性基层沥青路面的损坏状况进行了调查分析,得到主要原因为重载交通和基层、沥青层层间接触不佳。采用弹性层状体系,从理论上分析了超载和层间接触对路面结构响应的影响。结果表明,超载对路面结构应力、应变和位移最大值产生不利影响,而层间滑动对整个路面结构应力、应变和位移均有不利影响。半刚性基层与沥青面层和底基层两个界面在超载的作用下产生滑动,进而引起整个路面结构受力恶化导致破坏。提高面层与基层的层间粘结力和抗剪强度至关重要。

The damage condition of existing semi - rigid asphalt pavement was investigated and analysed. The two main reasons are overloading and contact conditions. Using BISAR 3.0, the effect of overloading and contact condition on pavement structure responding was analyzed. The results show that overloading has insignificant impact on the max stress and strain. Interlayer sliding is caused by overloading. It is important to raise interlayer bonding power and shear strength.