CUED Publications database

Liquefaction experiment and analysis projects (LEAP): Summary of observations from the planning phase

Manzari, MT and Ghoraiby, ME and Kutter, BL and Zeghal, M and Abdoun, T and Arduino, P and Armstrong, RJ and Beaty, M and Carey, T and Chen, Y and Ghofrani, A and Gutierrez, D and Goswami, N and Haigh, SK and Hung, WY and Iai, S and Kokkali, P and Lee, CJ and Madabhushi, SPG and Mejia, L and Sharp, M and Tobita, T and Ueda, K and Zhou, Y and Ziotopoulou, K (2017) Liquefaction experiment and analysis projects (LEAP): Summary of observations from the planning phase. Soil Dynamics and Earthquake Engineering. ISSN 0267-7261 (Unpublished)

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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 0.15. g (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 0.25. g (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.

Item Type: Article
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 01 Aug 2017 02:17
Last Modified: 22 Apr 2021 07:15
DOI: 10.1016/j.soildyn.2017.05.015