LEAP-2017 Simulation Exercise: Calibration of Constitutive Models and Simulation of the Element Tests

Manzari, Majid T.; Ghoraiby, Mohamed El; Zeghal, Mourad; Kutter, Bruce L.; Arduino, Pedro; Barrero, Andrés R.; Bilotta, Emilio; Chen, Long; Chen, Renren; Chiaradonna, Anna; Elgamal, Ahmed; Fasano, Gianluca; Fukutake, Kiyoshi; Fuentes, William; Ghofrani, Alborz; Ichii, Koji; Kiriyama, Takatoshi; Lascarro, Carlos; Mercado, Vicente; Montgomery, Jack; Ozutsumi, Osamu; Qiu, Zhijian; Taiebat, Mahdi; Travasarou, Thaleia; Tsiaousi, Dimitra; Ueda, Kyohei; Ugalde, Jose; Wada, Toma; Wang, Rui; Yang, Ming; Zhang, Jianmin; Ziotopoulou, Katerina

doi:10.1007/978-3-030-22818-7_9

Cited by 10 publications

(6 citation statements)

References 2 publications

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“…This particular aspect of the simulation results is likely related to the cyclic stress-strain responses produced by the different constitutive models. Few models show small opening of the stress-strain loops and exhibit significant ratcheting, while a few others display increasingly larger stress-strain loops without much ratcheting (see Manzari et al 2019). • An interesting trend is observed in the simulations of the CU-2 test which produced the largest observed lateral displacement consistent with the lowest Fig.…”

Section: Lateral Displacementsmentioning

confidence: 90%

“…In the first phase, numerical simulation teams used a large number of laboratory tests (El Ghoraiby et al 2018, 2019 to calibrate their constitutive models. Manzari et al (2019) provide a summary of the results of the first phase. In the second phase of the project, twelve numerical simulation teams (hereafter referred to as predictors) from different academic institutions and the geotechnical engineering industry across the world participated in the numerical simulation of a selection of the performed centrifuge experiments.…”

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: Lateral Displacementsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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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“…The calibration report and all the simulation data files were asked to be uploaded in the designated dropbox folder created for each simulation team. A summary of the calibration efforts and the results reported by each numerical simulation team are provided in Manzari et al (2019).…”

Section: Discussionmentioning

confidence: 99%

LEAP-2017 Simulation Exercise: Overview of Guidelines for the Element Test Simulations

Manzari

Ghoraiby

Kutter

et al. 2019

Model Tests and Numerical Simulations of Liquefaction and Lateral Spreading

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“…The key attributes of the DM04 formulation include the integration of a narrow conical yield surface, rotational (kinematic) hardening law, bounding surface, and dilatancy surface. These characteristics facilitate the simulation of the nonlinear mechanical behavior of granular soils subjected to both monotonic and cyclic loading conditions [30,31]. The general constitutive equation reads:…”

Section: Dafalias-manzari 2004 (Dm04) Modelmentioning

confidence: 99%

Simulation of soil-structure interaction of integral abutment bridges using advanced constitutive relations

Hassan,

Liyanapathirana,

Fuentes

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Integral bridges have been proposed as an attractive design concept that negate the requirements for expansion joints. However, owing to structural continuity, seasonal and diurnal thermal fluctuations have subjected the abutments to long-term cyclic interaction with approach backfills. This resulted in two notable geotechnical complications: ratcheting of lateral stresses and progressive soil deformation. To understand these phenomena, considerable research has been conducted using numerical methods. Here, either Winkler springs or simple constitutive relations, such as the Mohr-Coulomb model, are predominantly utilized. However, the former is based on monotonic displacement-dependent stiffness theories, and the latter is constrained by the limitations of the traditional yield surface plasticity. Hence, neither possesses the capability to simulate the hysteretic response, which is a characteristic of integral bridge approaches. Therefore, this study aims to present the advantages of using advanced constitutive relations to predict the long-term behavior of integral bridge approach backfills. First, using a lateral cyclic triaxial simulation, the significance of soil densification was highlighted by comparing the performance of the Mohr-Coulomb model with that of the bounding surface Dafalias-Manzari-2004 model. Subsequently, further comparisons were performed with the centrifuge model data of the integral abutment. At both the element and boundary value levels, the Mohr-Coulomb model could not capture the gradual accumulation of the lateral stresses. Conversely, the Dafalias-Manzari-2004 model can estimate the long-term passive pressure accumulation along the height of the abutment.

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LEAP-2017 Simulation Exercise: Calibration of Constitutive Models and Simulation of the Element Tests

Cited by 10 publications

References 2 publications

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

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

LEAP-2017 Simulation Exercise: Overview of Guidelines for the Element Test Simulations

Simulation of soil-structure interaction of integral abutment bridges using advanced constitutive relations

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