Centrifuge and Large-Scale Modeling of Seismic Pore Pressures in Sands: Cyclic Strain Interpretation

Abdoun, Tarek; González, Marcelo; Thevanayagam, S.; Dobry, Ricardo; Elgamal, Ahmed; Zeghal, Mourad; Mercado, Vicente; Shamy, Usama El

doi:10.1061/(asce)gt.1943-5606.0000821

Cited by 56 publications

(29 citation statements)

References 31 publications

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“…Tatsuoka et al [72] conducted a systematic study on the effect of deposition method on V s and concluded that it is not significant. On the other hand, a recent comparison between dry pluviated and hydraulically-filled Ottawa sand showed a significant increase for the dry pluviated soil [30,1]. The disconnect between the lowest values of V s1 predicted by the laboratory results in Fig.…”

Section: What Do Field Penetration and V S Measure?mentioning

confidence: 67%

“…As documented by Gonzalez [30] and Abdoun et al [1], two centrifuge tests were conducted at Rensselaer Polytechnic Institute with the specific purpose of simulating this full-scale Test SG-1. In both centrifuge experiments, the prototype height, laminar box inclination, and base input shaking were essentially the same as in Test SG-1.…”

Section: Why Do Liquefaction Charts Work?mentioning

confidence: 99%

“…The rest of this section revisits the issue of what controls the field liquefaction curves in Figs. 1-4 with the help of a recent series of full-scale and centrifuge liquefaction tests involving various levels of shaking intensity (see [1] for more details). Fig.…”

Section: Why Do Liquefaction Charts Work?mentioning

confidence: 99%

See 2 more Smart Citations

3rd Ishihara Lecture: An investigation into why liquefaction charts work: A necessary step toward integrating the states of art and practice

Dobry

Abdoun

2015

Soil Dynamics and Earthquake Engineering

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Section: What Do Field Penetration and V S Measure?mentioning

confidence: 67%

Section: Why Do Liquefaction Charts Work?mentioning

confidence: 99%

See 1 more Smart Citation

3rd Ishihara Lecture: An investigation into why liquefaction charts work: A necessary step toward integrating the states of art and practice

Dobry

Abdoun

2015

Soil Dynamics and Earthquake Engineering

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“…The preparation procedures of the experiment were according to the standard techniques used for saturated tests in the geotechnical centrifuge facility at Rensselaer Polytechnic Institute [4]. In these procedures, the dry sand is pluviated in the box at the desired void ratio; carbon dioxide is then introduced to the model in order to replace the air; and, finally, water is introduced by percolation for 12 h under vacuum to fully saturate the sand deposit [4].…”

Section: Centrifuge Experimentsmentioning

confidence: 99%

“…In these procedures, the dry sand is pluviated in the box at the desired void ratio; carbon dioxide is then introduced to the model in order to replace the air; and, finally, water is introduced by percolation for 12 h under vacuum to fully saturate the sand deposit [4]. More details about the technique used for model construction can be found in Gonzalez [11] and Abdoun et al [4]. Figure 12 shows a schematic of the laminar container along with the general configuration of the sensors used.…”

Section: Centrifuge Experimentsmentioning

confidence: 99%

Recent advances in physical modeling and remote sensing of civil infrastructure systems

Abdoun

El-Sekelly

2017

Innov. Infrastruct. Solut.

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Natural and man-made hazards are often associated with costly damages to civil infrastructure systems, such as buildings, bridges, Levees, dams, pipelines and offshore structures of all types. The lack of high-quality field and lab data of soil system response have eluded researchers and practitioners until recently. Recent advancements in physical modeling facilities (centrifuge and full scale) and advancement in remote sensing technology are leading to a new reality for the health assessment of soil-structure systems. This new reality is leading to a paradigm shift in the evaluation and modeling of soilstructure systems. Physical modeling, remote sensing and computational simulations are destined to replace the current empirical approaches and will ultimately become the main tool for analysis and design of soil-structure systems. The paper discusses the results of recent research studies utilizing physical modeling to simulate the response of critical soil-structure systems to natural and man-made hazards.

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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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Centrifuge and Large-Scale Modeling of Seismic Pore Pressures in Sands: Cyclic Strain Interpretation

Cited by 56 publications

References 31 publications

3rd Ishihara Lecture: An investigation into why liquefaction charts work: A necessary step toward integrating the states of art and practice

3rd Ishihara Lecture: An investigation into why liquefaction charts work: A necessary step toward integrating the states of art and practice

Recent advances in physical modeling and remote sensing of civil infrastructure systems

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

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