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LEAP-ASIA-2019 Simulations at Tsinghua University
This chapter presents the constitutive model calibration and numerical simulations of centrifuge shaking table tests for LEAP-ASIA-2019, at Tsinghua University. A plasticity model that can provide unified description for the behavior sand at different states under both monotonic and cyclic loading, with focus on the large post-liquefaction shear deformation, is calibrated and used in this study. New undrained cyclic torsional shear test results for Ottawa F65 sand provided in the most recent phase of the LEAP project are used in the calibration process. Typical results for acceleration, excess pore pressure, and displacement for one of the tests are presented in detail, showing that the numerical simulation is able to capture the liquefaction related behavior in the tests well. Comparisons between the simulation and test residual displacement results for the five different tests show conflicting results. The simulations for the two RPI tests under different centrifuge acceleration levels with different stress states and input motion frequencies generally show adequate agreement with test results, exhibiting the constitutive model and numerical simulation method’s wide applicability range. However, the simulation results for the KyU tests are significantly different to the test results.
LEAP-ASIA-2019 Simulations at Tsinghua University
This chapter presents the constitutive model calibration and numerical simulations of centrifuge shaking table tests for LEAP-ASIA-2019, at Tsinghua University. A plasticity model that can provide unified description for the behavior sand at different states under both monotonic and cyclic loading, with focus on the large post-liquefaction shear deformation, is calibrated and used in this study. New undrained cyclic torsional shear test results for Ottawa F65 sand provided in the most recent phase of the LEAP project are used in the calibration process. Typical results for acceleration, excess pore pressure, and displacement for one of the tests are presented in detail, showing that the numerical simulation is able to capture the liquefaction related behavior in the tests well. Comparisons between the simulation and test residual displacement results for the five different tests show conflicting results. The simulations for the two RPI tests under different centrifuge acceleration levels with different stress states and input motion frequencies generally show adequate agreement with test results, exhibiting the constitutive model and numerical simulation method’s wide applicability range. However, the simulation results for the KyU tests are significantly different to the test results.
LEAP-ASIA-2019 Simulations at Tsinghua University
Tobita, Tetsuo (editor) / Ichii, Koji (editor) / Ueda, Kyohei (editor) / Wang, Rui (author) / Zhu, Tong (author) / Zhou, Chuang (author) / Zhang, Jian-Min (author)
Liquefaction Experiments and Analysis Projects Workshop ; 2019 ; Osaka, Japan
Model Tests and Numerical Simulations of Liquefaction and Lateral Spreading II ; Chapter: 19 ; 399-408
2024-02-24
10 pages
Article/Chapter (Book)
Electronic Resource
English
| TIBKAT | 2024