TY - JOUR
T1 - Memory-Enhanced Plasticity Modeling of Sand Behavior under Undrained Cyclic Loading.
AU - Liu, Haoyuan
AU - Diambra, Andrea
AU - Abell, José Antonio
AU - Pisanò, Federico
N1 - Funding Information:
The authors wish to acknowledge the China Scholarship Council (CSC) and the Geo-Engineering Section of Delft University of Technology for financial support of the first author. The constructive feedback of two anonymous reviewers is also highly appreciated.
Publisher Copyright:
© 2020 American Society of Civil Engineers.
PY - 2020/11/1
Y1 - 2020/11/1
N2 - This work presents a critical state plasticity model for predicting the response of sands to cyclic loading. The well-known bounding surface SANISAND framework by Dafalias and Manzari is enhanced with a memory surface to capture micromechanical, fabric-related processes directly affecting cyclic sand behavior. The resulting model, SANISAND-MS, was recently proposed by Liu et al. and successfully applied to the simulation of drained sand ratcheting under thousands of loading cycles. Herein, novel ingredients are embedded into Liu et al.'s formulation to better capture the effects of fabric evolution history on sand stiffness and dilatancy. The new features enable remarkable accuracy in simulating undrained pore pressure buildup and cyclic mobility behavior in medium-dense to dense sand. The performance of the upgraded SANISAND-MS is validated against experimental test results from the literature-including undrained cyclic triaxial tests at varying cyclic loading conditions and precyclic consolidation histories. The proposed modeling platform will positively impact the study of relevant cyclic and dynamic problems, for instance, in the fields of earthquake and offshore geotechnics.
AB - This work presents a critical state plasticity model for predicting the response of sands to cyclic loading. The well-known bounding surface SANISAND framework by Dafalias and Manzari is enhanced with a memory surface to capture micromechanical, fabric-related processes directly affecting cyclic sand behavior. The resulting model, SANISAND-MS, was recently proposed by Liu et al. and successfully applied to the simulation of drained sand ratcheting under thousands of loading cycles. Herein, novel ingredients are embedded into Liu et al.'s formulation to better capture the effects of fabric evolution history on sand stiffness and dilatancy. The new features enable remarkable accuracy in simulating undrained pore pressure buildup and cyclic mobility behavior in medium-dense to dense sand. The performance of the upgraded SANISAND-MS is validated against experimental test results from the literature-including undrained cyclic triaxial tests at varying cyclic loading conditions and precyclic consolidation histories. The proposed modeling platform will positively impact the study of relevant cyclic and dynamic problems, for instance, in the fields of earthquake and offshore geotechnics.
UR - http://www.scopus.com/inward/record.url?scp=85091420131&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)GT.1943-5606.0002362
DO - 10.1061/(ASCE)GT.1943-5606.0002362
M3 - Article
AN - SCOPUS:85091420131
SN - 1090-0241
VL - 146
JO - Journal of Geotechnical and Geoenvironmental Engineering
JF - Journal of Geotechnical and Geoenvironmental Engineering
IS - 11
M1 - 04020122
ER -