复合式路面层间剪应力分析

复合式路面的常见病害常表现为层间剪切滑移破坏.选取典型的水泥混凝土下面层、黏结层、沥青混凝土上面层为一整体,应用BISAR3.0程序,计算分析了复合式路面层间最大剪应力、剪切角及其对温度、结构层厚度、材料模量、行车荷载等参数的敏感性.结果表明:AC层厚度、黏结层模量、行车荷载对层间剪应力、剪切角影响显著,当黏结层厚度由...

Analysis on Inter-laminar Shear Stress of Composite Pavement

The common disease of composite pavement is often in the form of interfacial shear slip damage.Firstly,typical cement concrete level layers,bonding layer,asphalt concrete top layer are selected as a whole layer.And then the composite pavement interlayer maximum shear,shear angle and the sensitivity for temperature,structure layer thickness,material modulus,driving load and so on are calculated by using BISAR 3.0 program.Results show that: the thickness of AC layer,the modulus of bonding layer,the traffic load have a significant effect on interlayer shear and shear angle.When the thickness of bonding layer changes from 6mm to 16mm,the interlayer maximum shear reduces by 48.85%,and shear angle reduces by 11.29%.Meanwhile,the influence of the thickness of bonding layer on the inter-laminar shear stress and resistance pull force performance is analyzed compositely,which determines the reasonable thickness of adhesion is 3mm.Surf and fminsearch in MATLAB software are used as tools to draw 3D surface graph about interlayer shear,shear angle with the thickness of AC layer and the modulus of bonding layer;finally,non-linear optimization is carried out to fit out the function of the relationship among the above three.