东南大学学报（英文版）2018，Vol.34Issue(2)：251-258,8.DOI:10.3969/j.issn.1003-7985.2018.02.015
路基粒料吸力依赖回弹模量本构模型的数值实现
Numerical implementation of suction-dependent resilient modulus constitutive model for subgrade granular material
摘要
Abstract
In order to investigate the suction-dependent properties of subgrade granular material and its effect on pavement responses, coupled hydro-mechanical simulations were conducted in Abaqus. A suction-dependent resilient modulus model was integrated into the commercial finite element ( FE ) code Abaqus by developing a user-defined material ( UMAT ) subroutine. The developed model was validated by triaxial test results under different suction conditions and good agreement was achieved. A three-dimensional (3D) FE pavement model was established and the suction-dependent properties of subgrade granular material was characterized by the developed constitutive model. Hydro-mechanical pavement responses subjected to three moisture states and the falling weight deflectometer ( FWD) load were calculated. Simulation results reveal that the resilient modulus of subgrade granular material is sensitive to suction and stress states; high groundwater table decreases the overall resilient moduli of subgrade structure due to suction reduction, leading to the increase of the maximum surface deflection, the tensile strain at bottom of the surface layer, compressive strain on top of subgrade, and consequently, deterioration in pavement performance.关键词
回弹模量模型/吸力/路面模型/有限元/粒料Key words
resilient modulus model/suction/pavement model/finite element/granular material分类
交通工程引用本文复制引用
廖公云,陈华庆,孙培翔..路基粒料吸力依赖回弹模量本构模型的数值实现[J].东南大学学报（英文版）,2018,34(2):251-258,8.基金项目
The Science and Technology Project of China Com-munications Construction ( No. 2015-ZJKJ-26) . （ No. 2015-ZJKJ-26）
