TY - JOUR
T1 - A bound water model for numerical simulation of SWCC in the wide suction range based on DDA
AU - Guo, Longxiao
AU - Chen, Guangqi
AU - Li, Changze
AU - Xia, Mingyao
AU - Gong, Shilin
AU - Zheng, Lu
N1 - Funding Information:
This work was supported by the National key R & D program of China (No. 2017YFC1501001-03), China Scholarship Council (CSC, No. 201706560004), SKLGP open fund (SKLGP2018K009) and JSPS KAKENHI Grant Numbers JP15K12483, JP16F16056 and JP15H01797. Also, this work was partly supported by the co-research project conducted by Kyushu University and W-NEXCO. The financial supports are gratefully acknowledged.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/11
Y1 - 2021/11
N2 - In this study, Discontinuous Deformation Analysis (DDA) method is extended to simulate Soil-Water Characteristic Curve (SWCC) by considering both capillary water and bound water at the micro-scale. First, a simple and practical bound water model is proposed and incorporated into DDA program to simulate SWCC in the high suction range. Then, to prove the availability of the developed program, the extended DDA is used to simulate the SWCCs of two types of fine sand with kaolin clay in a wide suction range. The simulation results agree with the experimental results, which demonstrate that the extended DDA is an alternative method for simulating and analyzing SWCC of both cohesionless soil and cohesive soil. Finally, one of the influential factors specific surface area is theoretically analyzed. This study provides an approach to simulate the matric suction of unsaturated soil, and the extended DDA could be a potential tool for unsaturated soil research.
AB - In this study, Discontinuous Deformation Analysis (DDA) method is extended to simulate Soil-Water Characteristic Curve (SWCC) by considering both capillary water and bound water at the micro-scale. First, a simple and practical bound water model is proposed and incorporated into DDA program to simulate SWCC in the high suction range. Then, to prove the availability of the developed program, the extended DDA is used to simulate the SWCCs of two types of fine sand with kaolin clay in a wide suction range. The simulation results agree with the experimental results, which demonstrate that the extended DDA is an alternative method for simulating and analyzing SWCC of both cohesionless soil and cohesive soil. Finally, one of the influential factors specific surface area is theoretically analyzed. This study provides an approach to simulate the matric suction of unsaturated soil, and the extended DDA could be a potential tool for unsaturated soil research.
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U2 - 10.1016/j.compgeo.2021.104378
DO - 10.1016/j.compgeo.2021.104378
M3 - Article
AN - SCOPUS:85112482456
VL - 139
JO - Computers and Geotechnics
JF - Computers and Geotechnics
SN - 0266-352X
M1 - 104378
ER -