摘要
基于动力学基本方程,运用有限单元法(FEM)和NEWMARK隐式积分方法,对动荷载(FWD荷载)作用下路基下伏黄土暗穴对路面结构变形响应的影响进行了弹塑性数值分析。考虑到人工截断边界上波反射对计算结果的影响,分别用传递边界和半无限单元来处理侧面和底面边界。主要考虑了动荷载周期、暗穴洞径和埋深3个影响因素,并在计算结果的基础上分析总结了它们对路面结构变形响应的影响规律。
According to the basic equation of dynamics, using FEM and NEWMARK implicit algorithm, an elastoplastic numerical analysis is made to analyze the effect of hidden holes in loess on the dynamic deformation response of pavement structure. In order to reduce the effect of wave reflecting on artificial boundary, transmitting boundary and semi-infinite element are respectively used to treat the lateral and underside boundaries. The cycle of dynamic load and the diameter and depth of hidden holes in loess are the mainly considered three factors. Finally, based on the numerical calculation results, their effect laws on deformation response of pavement structure are analyzed.
出处
《岩土力学》
EI
CSCD
北大核心
2008年第3期673-678,共6页
Rock and Soil Mechanics
基金
国家西部交通建设科技攻关项目(No.2001-318-812-13)
关键词
黄土暗穴
路面结构
变形响应
有限元法
传递边界
半无限单元
FWD荷载
hidden holes in loess
pavement structure
deformation response
FEM
transmitting boundary
semi-infinite elements
FWD load
