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Type-C Simulations of Centrifuge Tests from LEAP-ASIA-2019 Using SANISAND-Sf
This chapter presents Type-C numerical simulations of prototype-scale centrifuge tests on gently sloped liquefiable deposits of Ottawa F65 sand for the LEAP-ASIA-2019 project. The simulations aim to assess the performance of the numerical modeling approach and a SANISAND-type constitutive model for large post-liquefaction shear deformation of sands. The constitutive model is calibrated against cyclic torsional shear tests conducted at different relative density levels and cyclic shear stress amplitudes. The laboratory-determined hydraulic conductivity of sand is doubled and kept constant during the dynamic stage of the analyses to account for the increase in permeability experienced during liquefaction. The simulations successfully capture the acceleration response and excess pore water pressure generation and dissipation of the slope deposit when soil liquefaction is observed. However, accurately modeling lateral displacements remains challenging in most cases. The results provide insights into the capabilities and limitations of the adopted Type-C numerical simulations, numerical modeling approach, and constitutive model.
Type-C Simulations of Centrifuge Tests from LEAP-ASIA-2019 Using SANISAND-Sf
This chapter presents Type-C numerical simulations of prototype-scale centrifuge tests on gently sloped liquefiable deposits of Ottawa F65 sand for the LEAP-ASIA-2019 project. The simulations aim to assess the performance of the numerical modeling approach and a SANISAND-type constitutive model for large post-liquefaction shear deformation of sands. The constitutive model is calibrated against cyclic torsional shear tests conducted at different relative density levels and cyclic shear stress amplitudes. The laboratory-determined hydraulic conductivity of sand is doubled and kept constant during the dynamic stage of the analyses to account for the increase in permeability experienced during liquefaction. The simulations successfully capture the acceleration response and excess pore water pressure generation and dissipation of the slope deposit when soil liquefaction is observed. However, accurately modeling lateral displacements remains challenging in most cases. The results provide insights into the capabilities and limitations of the adopted Type-C numerical simulations, numerical modeling approach, and constitutive model.
Type-C Simulations of Centrifuge Tests from LEAP-ASIA-2019 Using SANISAND-Sf
Tobita, Tetsuo (editor) / Ichii, Koji (editor) / Ueda, Kyohei (editor) / Reyes, Andrés (author) / Barrero, Andrés R. (author) / Taiebat, Mahdi (author)
Liquefaction Experiments and Analysis Projects Workshop ; 2019 ; Osaka, Japan
Model Tests and Numerical Simulations of Liquefaction and Lateral Spreading II ; Chapter: 14 ; 315-334
2024-02-24
20 pages
Article/Chapter (Book)
Electronic Resource
English
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