作　　者： ; ; ;

机构地区： 山东科技大学土木建筑学院

出　　处： 《振动与冲击》 2009年第10期141-146,共6页

摘　　要： 利用动态有限元数值计算理论和显示积分方法对路面结构的动态响应进行了分析。首先对垂直脉冲荷载和移动荷载两种加载模式下路面结构响应进行了对比,发现垂直脉冲荷载虽然能反映行车荷载瞬时性的特点,但其与实际的移动荷载相比仍存在较大误差。然后以移动荷载为加载模式,并考虑了轴载组合及路面各结构层层间粘结状态等影响因素,对移动荷载下的路面结构响应进行了详细计算分析。 The responses of stress in a pavement structure under moving distributed load were obtained by using three-dimensional dynamic FEM and explicit integral.Vertical impulsive loads and moving loads were put on the road model,respectively and the difference of the responses of the pavement structure was gained.The results showed that vertical impulsive loads could reflect the instantaneous property of traffic loading,but distinct errors till existed compared with actual moving loads.Inner stress in the surface layer and tensile stress at the bottom of base were analyzed mainly considering several factors,such as,contact condition between layers and axle combination.

关 键 词： 垂直脉冲荷载 移动荷载 有限元方法 轴载组合 层间结合状态

领　　域： [交通运输工程]