TY - JOUR
T1 - Liquefaction experiment and analysis projects (LEAP)
T2 - Summary of observations from the planning phase
AU - Manzari, Majid T.
AU - Ghoraiby, Mohamed El
AU - Kutter, Bruce L.
AU - Zeghal, Mourad
AU - Abdoun, Tarek
AU - Arduino, Pedro
AU - Armstrong, Richard J.
AU - Beaty, Michael
AU - Carey, Trevor
AU - Chen, Yunmin
AU - Ghofrani, Alborz
AU - Gutierrez, David
AU - Goswami, Nithyagopal
AU - Haigh, Stuart K.
AU - Hung, Wen Yi
AU - Iai, Susumu
AU - Kokkali, Panagiota
AU - Lee, Chung Jung
AU - Madabhushi, S. P.Gopal
AU - Mejia, Lelio
AU - Sharp, Michael
AU - Tobita, Tetsuo
AU - Ueda, Kyohei
AU - Zhou, Yanguo
AU - Ziotopoulou, Katerina
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2018/10
Y1 - 2018/10
N2 - The LEAP international collaboratory is introduced and its key objectives and main accomplishments during the planning phase of the US-LEAP (LEAP-2015) are presented. The main theme of LEAP-2015 was lateral spreading of sloping liquefiable soils. A summary of the results of the laboratory element tests performed on the selected soil (Ottawa F-65) is presented. The numerical simulations submitted by several predictors at different stages of the project are compared with the measured responses of sloping deposit specimens tested in a rigid box at six different centrifuge facilities around the world. The comparisons are presented for three rounds of simulations labeled here as types A, B, and C simulations. The type A simulations involved the response of the soil specimen to a prescribed base excitation with a maximum amplitude of 0.15g (Motion #2). Comparisons of the numerical simulations with the experimental results show that a sub-set of type A simulations were in reasonably good agreement with the responses measured in the reference centrifuge experiment. The predictors subsequently assessed the performance of their type A simulations by comparing them to the measured responses, made the necessary adjustments in their models, and conducted a type B simulation of the response of the same soil specimen subjected to an amplified base excitation with a maximum amplitude of 0.25g (Motion #4). In these type B simulations, the achieved base motions were used and the simulations showed an improved correlation with the experimental results. The predictors also conducted a type C simulation of the original test (Motion #2) using the base motions achieved on the six centrifuge facilities. The results showed very good agreement with the experimental results.
AB - The LEAP international collaboratory is introduced and its key objectives and main accomplishments during the planning phase of the US-LEAP (LEAP-2015) are presented. The main theme of LEAP-2015 was lateral spreading of sloping liquefiable soils. A summary of the results of the laboratory element tests performed on the selected soil (Ottawa F-65) is presented. The numerical simulations submitted by several predictors at different stages of the project are compared with the measured responses of sloping deposit specimens tested in a rigid box at six different centrifuge facilities around the world. The comparisons are presented for three rounds of simulations labeled here as types A, B, and C simulations. The type A simulations involved the response of the soil specimen to a prescribed base excitation with a maximum amplitude of 0.15g (Motion #2). Comparisons of the numerical simulations with the experimental results show that a sub-set of type A simulations were in reasonably good agreement with the responses measured in the reference centrifuge experiment. The predictors subsequently assessed the performance of their type A simulations by comparing them to the measured responses, made the necessary adjustments in their models, and conducted a type B simulation of the response of the same soil specimen subjected to an amplified base excitation with a maximum amplitude of 0.25g (Motion #4). In these type B simulations, the achieved base motions were used and the simulations showed an improved correlation with the experimental results. The predictors also conducted a type C simulation of the original test (Motion #2) using the base motions achieved on the six centrifuge facilities. The results showed very good agreement with the experimental results.
KW - Calibration
KW - Centrifuge modeling
KW - Constitutive modeling
KW - Elastoplasticity
KW - Liquefaction
KW - Numerical modeling
KW - Validation
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U2 - 10.1016/j.soildyn.2017.05.015
DO - 10.1016/j.soildyn.2017.05.015
M3 - Article
AN - SCOPUS:85021998812
SN - 0267-7261
VL - 113
SP - 714
EP - 743
JO - Soil Dynamics and Earthquake Engineering
JF - Soil Dynamics and Earthquake Engineering
ER -