LEAP-UCD-2017 V. 1.01 Model Specifications

Kutter, Bruce L.; Carey, Trevor J.; Stone, Nicholas; Hajialilue-Bonab, Masoud; Manzari, Majid T.; Zeghal, Mourad; Escoffier, Sandra; Haigh, Stuart; Madabhushi, Spg; Hung, Wen Yi; Kim, Dong-Soo; Kim, Nam Ryong; Okamura, Mitsu; Tobita, Tetsuo; Ueda, Kyohei; Zhou, Yan‐Guo

doi:10.1007/978-3-030-22818-7_1

Cited by 31 publications

(36 citation statements)

References 13 publications

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“…Similar to the LEAP-2015 project, the LEAP-2017 centrifuge experiments were designed to investigate the lateral spreading of a submerged mildly sloping liquefiable deposit. Figures 10.1 and 10.2 show the baseline schematic of these experiments (Kutter et al 2017(Kutter et al , 2019. The soil specimen is a sloping layer of Ottawa F65 sand with a height of 4 m (in prototype scale) at the center and a slope of 5 degrees.…”

Section: Leap-2017 Centrifuge Experimentsmentioning

confidence: 99%

“…Figures 10.3, 10.4, 10.5, 10.6, 10.7, 10.8, and 10.9 show detailed comparisons of the predicted time histories of excess pore water pressures computed at the central section of the centrifuge specimen (pore pressure sensors 1 to 4) with the results (Kutter et al 2019). Qualitative similarities with the experimental curves are noted for the majority of the predictions, except for Prediction 7 in which a calibration error, later noticed by the predictors, produced significantly underpredicted excess pore pressures.…”

Section: Excess Pore Water Pressure Time Historiesmentioning

confidence: 99%

“…The lateral displacements at the surface of the centrifuge specimens were measured by tracking the locations of surface markers using the photos taken by high-speed cameras as described in Kutter et al (2019). In two (UCD-1 and UCD-3) out of the nine centrifuge tests selected for Type-B numerical simulations, the data obtained from high-speed cameras were used to construct a time history of surface displacement in the middle portion of the slope.…”

Section: Lateral Displacementsmentioning

confidence: 99%

“…In two (UCD-1 and UCD-3) out of the nine centrifuge tests selected for Type-B numerical simulations, the data obtained from high-speed cameras were used to construct a time history of surface displacement in the middle portion of the slope. In five other tests (CU-2, Ehime 2, KAIST-2, NCU-3, ZJU-3), the final locations of the surface markers measured after the end of the test and time histories of dynamic displacements computed from measured acceleration time histories were used to reconstruct surface displacement time histories (Kutter et al 2019). In the case of the KAIST-1 and KyU-3 tests, surface marker data was not available or sufficiently consistent to reconstruct a time history of the surface displacements.…”

Section: Lateral Displacementsmentioning

confidence: 99%

“…This paper presents a summary of key aspects of the Type-B numerical simulations and their comparisons with the experimental data obtained from centrifuge tests (Kutter et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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LEAP-2017: Comparison of the Type-B Numerical Simulations with Centrifuge Test Results

Manzari

Ghoraiby

Zeghal

et al. 2019

Model Tests and Numerical Simulations of Liquefaction and Lateral Spreading

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This paper presents comparisons of 11 sets of Type-B numerical simulations with the results of a selected set of centrifuge tests conducted in the LEAP-2017 project. Time histories of accelerations, excess pore water pressures, and lateral displacement of the ground surface are compared to the results of nine centrifuge tests. A number of numerical simulations showed trends similar to those observed in the experiments. While achieving a close match to all measured responses (accelerations, pore pressures, and displacements) is quite challenging, the numerical simulations show promising capabilities that can be further improved with the availability of additional high-quality experimental results.

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Section: Leap-2017 Centrifuge Experimentsmentioning

confidence: 99%

Section: Excess Pore Water Pressure Time Historiesmentioning

confidence: 99%

Section: Lateral Displacementsmentioning

confidence: 99%

Section: Lateral Displacementsmentioning

confidence: 99%

“…This paper presents a summary of key aspects of the Type-B numerical simulations and their comparisons with the experimental data obtained from centrifuge tests (Kutter et al 2019).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

LEAP-2017: Comparison of the Type-B Numerical Simulations with Centrifuge Test Results

Manzari

Ghoraiby

Zeghal

et al. 2019

Model Tests and Numerical Simulations of Liquefaction and Lateral Spreading

Self Cite

View full text Add to dashboard Cite

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A practical three‐dimensional plasticity model for cyclic degradation of soil in earthquake loading applications

Qiu

Prabhakaran

Zhou

et al. 2023

Earthq Engng Struct Dyn

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A practical yet realistic three‐dimensional (3D) constitutive model is presented for modeling the cyclic degradation behavior of soil. Such response can be attributed to pore pressure build‐up and loss of cementation, among other stiffness and strength degradation mechanisms. Extending an existing multi‐yield surface (MYS) plasticity formulation, the cyclic degradation model (CDM) is developed by incorporating a novel degradation logic in terms of accumulated plastic strain or as prescribed by the user. Thereafter, the CDM is implemented into a computational framework (OpenSees), and Finite Element (FE) calibrations are undertaken to match the available experimental data at the element and system levels. A generally good agreement between the FE simulations and centrifuge test data demonstrates the CDM's capabilities to simulate the seismic response of sloping sites. Using the calibrated model properties, full 3D FE simulations of a large‐scale multi‐span bridge configuration, motivated by details of an actual bridge system in sloping ground, are conducted to highlight the underlying response mechanisms. In addition, computed results including and precluding the effects of cyclic degradation are directly compared and discussed. It is shown that loss of soil strength and stiffness play a noticeable role in the resulting ground and bridge response. Overall, the newly developed constitutive model and findings are of importance for a wide range of soil formations where cyclic degradation occurs under earthquake loading.

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