碎石化混凝土路面沥青加铺层结构的数值分析  

Numerical Simulation of Asphalt Overlays on Rubblized PCC Slab

作　　者：张泉[1] 陆阳[1] 杨智敏[2] 张华[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]四川省交通厅公路规划勘测设计研究院,四川成都610041

出　　处：《公路交通科技》2009年第8期22-27,共6页Journal of Highway and Transportation Research and Development

基　　金：四川省交通厅科研计划项目(sc20070166)

摘　　要：将沥青加铺层及碎石化混凝土视为连续及非连续颗粒介质,分别采用有限差分法与颗粒离散单元法模拟沥青加铺层及碎石结构层的力学行为,并采用耦合的方式,分析碎石化结构层与沥青加铺层对外荷载作用的联合力学响应。在满足边界相容条件与平衡条件的前提下,通过交界面上作用力与节点位移(速度)的传递,模拟了系统的荷载响应过程,并通过某工程实例对计算值和实测值进行了比较。结果表明:采用耦合原理计算的路表弯沉最大值与FWD实测结果较为接近,且两者沿径向分布规律相一致。The mechanical behavior of asphalt overlays and the rubblized PCC slabs which were regarded as continuous and discontinuous medium respectively was simulated by a nttmerical method which combines the finite difference with DEM. The rubblized PCC slabs was described by the DEM, while asphalt overlays was considered by the finite difference method. Under the premise of the compatibility and equilibrium along the corresponding boundaries being satisfied in the computation process, the whole process of mechanical response was simulated through the transmission of the ＂gridpoint displacement＂ and ＂gridpoint force＂ along the corresponding boundaries with coupling. Through the comparison of the calculation result and field test data of an example of the project, it is shown that the maximum computation deflection by using FDM/DEM is more similar to the field measurement result, and the deflection law of numerical result is identical to that of the field test by using FWD.

关 键 词：道路工程 沥青加铺层结构 有限差分 颗粒离散元 

分 类 号：U416.26[交通运输工程—道路与铁道工程]