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

Majid T Manzari; Mohamed El Ghoraiby; Bruce L Kutter; Mourad Zeghal; Tarek Abdoun; Pedro Arduino; Richard J Armstrong; Michael Beaty; Trevor Carey; Yunmin Chen; Alborz Ghofrani; David Gutierrez; Nithyagopal Goswami; Stuart K Haigh; Wen-Yi Hung; Susumu Iai; Panagiota Kokkali; Chung-Jung Lee; S.P. Gopal Madabhushi; Lelio Mejia; Michael Sharp; Tetsuo Tobita; Kyohei Ueda; Yanguo Zhou; Katerina Ziotopoulou

doi:10.1016/j.soildyn.2017.05.015

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

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

Majid T Manzari, Mohamed El Ghoraiby, Bruce L Kutter, Mourad Zeghal, Tarek Abdoun, Pedro Arduino, Richard J Armstrong, Michael Beaty, Trevor Carey, Yunmin Chen, …

Soil dynamics and earthquake engineering (1984), Vol.113, pp.714-743

10/2018

DOI: https://doi.org/10.1016/j.soildyn.2017.05.015

Handle:

https://hdl.handle.net/20.500.12741/rep:4223

Abstract

Numerical modeling

Validation

Elastoplasticity

Liquefaction

Calibration

Centrifuge modeling

Constitutive modeling

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. •Details of the LEAP-2015 centrifuge tests are outlined.•Class A numerical predictions are compared to the results of the centrifuge test conducted at RPI.•Class B and C simulations of the centrifuge tests are compared with the experimental data.•Detailed assessments are performed for each of the simulation sets.

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Title: Liquefaction experiment and analysis projects (LEAP): Summary of observations from the planning phase
Creators: Majid T Manzari - Department of Civil and Environmental Engineering, George Washington University, Washington, D.C., USA
Mohamed El Ghoraiby - Department of Civil and Environmental Engineering, George Washington University, Washington, D.C., USA
Bruce L Kutter - Department of Civil and Environmental Engineering, University of California, Davis, USA
Mourad Zeghal - Department of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA
Tarek Abdoun - Department of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA
Pedro Arduino - Department of Civil and Environmental Engineering, University of Washington, Seattle, USA
Richard J Armstrong - Department of Civil and Environmental Engineering, California State University, Sacramento, USA
Michael Beaty - Beaty Engineering LLC, USA
Trevor Carey - Department of Civil and Environmental Engineering, University of California, Davis, USA
Yunmin Chen - Department of Civil and Environmental Engineering, Zhejiang University, Hangzhou, Zhejiang, China
Alborz Ghofrani - Department of Civil and Environmental Engineering, University of Washington, Seattle, USA
David Gutierrez - GEI Consultants, Inc., Formerly at Division of Safety of Dams, Sacramento, CA, USA
Nithyagopal Goswami - Department of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA
Stuart K Haigh - Geosyntec Consultants, 1111 Broadway, 6th Floor, Oakland, CA 94607, USA
Wen-Yi Hung - Department of Civil Engineering, National Central University of Taiwan, Taoyuan City, Taiwan
Susumu Iai - Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan
Panagiota Kokkali - Department of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA
Chung-Jung Lee - Department of Civil Engineering, National Central University of Taiwan, Taoyuan City, Taiwan
S.P. Gopal Madabhushi - Geosyntec Consultants, 1111 Broadway, 6th Floor, Oakland, CA 94607, USA
Lelio Mejia - AECOM Corp., Oakland, CA, USA
Michael Sharp - US Army Corps of Engineers, MS, USA
Tetsuo Tobita - Department of Civil, Environmental and Applied System Engineering, Kansai University, Osaka, Japan
Kyohei Ueda - Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan
Yanguo Zhou - Department of Civil and Environmental Engineering, Zhejiang University, Hangzhou, Zhejiang, China
Katerina Ziotopoulou - Department of Civil and Environmental Engineering, University of California, Davis, USA
Academic Unit: Civil Engineering Department
Publisher: Elsevier Ltd
Publication Details: 10/2018
Identifiers: 99257847463801671; https://hdl.handle.net/20.500.12741/rep:4223; https://doi.org/10.1016/j.soildyn.2017.05.015
Language: English

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

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