旧水泥混凝土路面上沥青加铺层的应力分析

Stress Analysis of Asphalt Overlay on Existing Concrete Pavements

本文采用平面有限元方法,根据Goodman力学模型建立旧路面与加铺层层间结合条件,计算分析了具有接缝(或裂缝)的旧水泥混凝土路面上沥青加铺层在行车荷载和温度变化作用下的应力和位移状况,分析了反射裂缝产生发展的原因,以及加铺层厚度和应力消散夹层防治反射裂缝的作用,为合理地设计加铺层提供依据和计算方法。

The stresses within asphalt overlays on existing jointed(or cracked) concrete pavements due to traffic loading and thermal contraction have been analysed by using a two-dimensional finite element model with the consideration of the bonding conditions between overlays and existing pavements. The mechanism of reflection cracking and the effect of layer thickness and interlayer has also been discussed. It is found that the bonding condition between overlay and existing pavement has considerable impact on loading or thermal stress paterns within overlay.