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为探究车辆荷载和荷位对水泥混凝土桥沥青铺装结构剪应力的影响,采用ANSYS有限元软件,建立了某箱梁中跨桥面系的三维有限元模型,计算了铺装层及层间剪应力的变化规律,并给出了最不利荷位。结果表明:不同荷位下,AC层与CC调平层间的最大剪应力明显大于AC上、下面层和AC层间的最大剪应力,且前者对于荷位变化的敏感性远高于后者。因此,合理控制AC层与CC调平层间的剪切破坏对于避免桥面铺装损坏具有重要意义。
In order to investigate the influence of vehicle load and load on the shear stress of asphalt concrete pavement, ANSYS finite element software was used to establish the three-dimensional finite element model of the mid-span bridge deck of a box girder. Shear stress changes, and gives the most unfavorable charge. The results show that under different charge levels, the maximum shear stress between AC layer and CC leveling layer is obviously larger than the maximum shear stress between AC layer, AC layer and AC layer, and the former is much more sensitive to the change of charge level . Therefore, it is important to control the shear failure between AC layer and CC leveling layer reasonably to avoid the damage of deck pavement.