路基不均匀沉降对沥青路面受力变形影响的有限元分析

Nonlinear FEM analysis of influence of asphalt pavement under non-homogenous settlement of roadbed

为了研究路基不均匀沉降对沥青路面受力变形的影响,对半填半挖路基进行弹塑性动力有限元分析,计算出在汽车荷载作用下由于路基土在力学和物理性质上的差异而产生的差异沉降。研究了两种工况(汽车荷栽作用产生的差异沉降及汽车荷载和土体固结共同作用产生的差异沉降)对沥青路面受力变形特性的影响,进而得出一种计算沥青路面破坏时临界差异沉降的方法,为实际工程设计、施工提供了理论依据。

To analyze the influence of the asphalt pavement deformation under the non-homogenous settlement of the roadbed,authors use elastic-plastic dynamic FEM to compute the differential settlement of the half-filled and half-dug embankment under the traffic load. Then, the deformation specific of the asphalt pavement under a couple of working conditions, including the differential settlement under the automobile load and the differential settlement under the automobile load and the subsoil consolidation is analyzed. Finally,a kind of method to compute the critical differential settlement which makes asphalt pavement yielded is drawn. Theoretical method is then provided for engineering design and construction.