A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Characterization of Stress-Dependent Resilient Modulus of Subgrade Sandy Soils by Two-Dimensional Discrete Element Method
Subgrade soils are very important materials to support highways. Current AASHTO pavement design procedures recommend the resilient modulus (Mr) of subgrade soils or pavement design and analysis. The primary objective of this study is to conduct numerical simulations of the resilient modulus of subgrade sandy soils under repeated triaxial loading conditions using a two-dimensional discrete elements code, e.g., particle flow code in two dimensions (PFC2D). A stress-controlled loading scheme is designed in 2D-DEM simulations. A total of 15 loading sequences, which are composed of different combinations of confining and deviatoric stress, are applied to a generated sample. Research results show that simulated Mr is in good agreement with the real RTL laboratory testing. It is concluded that 2D-DEM is a promising tool for simulation of resilient modulus of granular materials.
Characterization of Stress-Dependent Resilient Modulus of Subgrade Sandy Soils by Two-Dimensional Discrete Element Method
Subgrade soils are very important materials to support highways. Current AASHTO pavement design procedures recommend the resilient modulus (Mr) of subgrade soils or pavement design and analysis. The primary objective of this study is to conduct numerical simulations of the resilient modulus of subgrade sandy soils under repeated triaxial loading conditions using a two-dimensional discrete elements code, e.g., particle flow code in two dimensions (PFC2D). A stress-controlled loading scheme is designed in 2D-DEM simulations. A total of 15 loading sequences, which are composed of different combinations of confining and deviatoric stress, are applied to a generated sample. Research results show that simulated Mr is in good agreement with the real RTL laboratory testing. It is concluded that 2D-DEM is a promising tool for simulation of resilient modulus of granular materials.
Characterization of Stress-Dependent Resilient Modulus of Subgrade Sandy Soils by Two-Dimensional Discrete Element Method
Zhang, Xiao (author)
14th COTA International Conference of Transportation Professionals ; 2014 ; Changsha, China
CICTP 2014 ; 938-943
2014-06-24
Conference paper
Electronic Resource
English
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