摘要
水-荷载的耦合作用是沥青路面早期损坏的主要原因之一.基于饱和多孔介质理论通过轴对称有限元的瞬态动力分析,计算得到饱和沥青路面内部孔隙水压力的时程变化;分析不同渗透性、车速和荷载条件下的孔隙水压力变化规律.结果表明,荷载的动态作用导致沥青路面内部的孔隙水压力具有波动性质;正负孔隙水压力的循环作用是沥青膜破坏的主要诱因;路面内部存水时,高速、重载将加速沥青路面性能衰减.
The coupled moisture - loading action is the primary factor of initial failure for asphalt pavement. At first, porous media theory was used to describe asphalt pavement in the environment. Then, transient dynamic analysis of axisymmetric finite element method was employed to calculate the pore pressures at different times within saturated asphalt pavement based on saturated porous media theory. Finally, the pore pressure variations between different permeabilities, vehicle speeds and loadings were analyzed. The result indicates that the dynamic action of vehicle makes the pore pressure within pavement structure have wave characteristics. It also shows that the cycling action of positive and negative pore pressure is the primary inducement of the asphalt film failure, and high vehicle speed and overloading will accelerate the reduction of pavement performance when moisture exists in pavement structure.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2007年第10期1614-1617,共4页
Journal of Harbin Institute of Technology
基金
高等学校博士学科点专项科研基金资助项目(20060213002)
哈尔滨工业大学优秀青年教师培养计划资助项目(HITQNJS.2007.032)
关键词
水-荷载耦合作用
孔隙水压力
有限元
饱和多孔介质
moisture -loading coupled action
pore pressure
finite element
saturated porous media
