车轮制动对半刚性路面损坏的有限元分析

针对半刚性路面的特点,建立了路面在车轮制动作用下的三维有限元分析模型。分析了车轮制动作用路面的动态响应。结果表明,在车轮制动作用下,半刚性路面的应力、应变等大大增加,路面的疲劳破坏增大。沥青面层间的剪切应力的增大以及表面层大量的垂向拉应变,使沥青面层产生滑移,半刚性路面产生波浪、拥包等变形。车轮的制动作用是导致半刚性路面沥青面层疲劳破坏和剪切滑移破坏的主要原因。

Finite Element Analysis of Vehicle Braking Effect on Pavement Damage

A 3-D FEA model of semi-rigid pavement was established based on the elastic layered theory and the damage of the pavement induced by vehicle braking force was analyzed using ANSYS software. The simulation results indicated that the stress and strain of pavement increased largely under vehicle braking effect, and so as to its damage to pavement. The increment of shearing stress between asphalt layer and vertical tensile strain at asphalt surface caused the slip of asphalt and distortion such as wave and heave at semi-rigid pavement. The vehicle braking effect was the key reason of pavement fatigue damage and shearing slip damage.