Inertial and Liquefaction-Induced Kinematic Demands on a Pile-Supported Wharf: Physical Modeling

Souri, Milad; Khosravifar, Arash; Dickenson, Stephen E.; Schlechter, Scott; McCullough, Nason J.

doi:10.1061/9780784481479.040

Cited by 2 publications

(4 citation statements)

References 3 publications

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“…This method of modeling of piles in a 2D plane strain model is commonly used in piled raft foundations. [82][83][84] The normal stiffness for plane strain pile (E A psp ), the flexural rigidity for plane strain pile (E I psp ) and the weight for plane strain pile (w psp ) can be calculated by using respectively the equations (20), (21) and (22):ing to the comparison between curves for both Oedometer and Triaxial tests, and for all the different soil als, the best consistency between MC model and advanced models is observed when the value of the Young's us in the MC model is assumed to be equal to � 50 �� . Consequently, all the geotechnical characteristics of the soil presented previously will be used in the numerical analysis.…”

Section: Materials Model For Structural Elementsmentioning

confidence: 99%

“…This method of modeling of piles in a 2D plane ain model is commonly used in piled raft foundations. [82][83][84] e normal stiffness for plane strain pile (� � �� ), the flexural rigidity for plane strain pile (� � �� ) and the weight for ne strain pile (� �� ) can be calculated by using respectively the equations (20), (21) and (22):…”

Section: Materials Model For Structural Elementsmentioning

confidence: 99%

“…Su et al [20] conducted 3D finite element analysis of pile-supported wharf and considered the effect of the ground slope and pile connectivity along the wharf deck. Souri et al [21] conducted physical modeling of wharf piles in sloping rockfill subjected to liquefaction-induced lateral spreading, and studied kinematic demands and full superstructure inertia in order to estimate bending moments of piles at different depths. Vytiniotis et al [22] studied the effect of prefabricated vertical drains installed behind the crest of the slope to control the lateral spreading in the fill and to reduce seismic damage of the wharf structure.…”

Section: Introductionmentioning

confidence: 99%

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The influence of the soil constitutive models on the seismic analysis of pile-supported wharf structures with batter piles in cut-slope rock dike

Deghoul

Gabi

Hamrouni

2020

Studia Geotechnica Et Mechanica

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AbstractIn coastal regions, earthquakes caused severe damage to marine structures. Many researchers have conducted numerical investigations in order to understand the dynamic behavior of these structures. The most frequently used model in numerical calculations of soil is the linear-elastic perfectly plastic model with a Mohr-Coulomb failure criterion (MC model). It is recommended to use this model to represent a first-order approximation of soil behavior. Therefore, it is necessary to accommodate soil constitutive models for the specific geotechnical problems.In this paper, three soil constitutive models with different accuracy were applied by using the two-dimensional finite element software PLAXIS to study the behavior of pile-supported wharf embedded in rock dike, under the 1989 Loma Prieta earthquake. These models are: a linear-elastic perfectly plastic model (MC model), an elastoplastic model with isotropic hardening (HS model), and the Hardening Soil model with an extension to the small-strain stiffness (HSS model).A typical pile-supported wharf structure with batter piles from the western United States ports was selected to perform the study. The wharf included cut-slope (sliver) rock dike configuration, which is constituted by a thin layer of rockfill overlaid by a slope of loose sand. The foundation soil and the backfill soil behind the wharf were all dense sand. The soil parameters used in the study were calibrated in numerical soil element tests (Oedometer and Triaxial tests).The wharf displacement and pore pressure results obtained using models with different accuracy were compared to the numerical results of Heidary-Torkamani et al.[28] It was found that the Hardening Soil model with small-strain stiffness (HSS model) gives clearly better results than the MC and HS models.Afterwards, the pile displacements in sloping rockfill were analyzed. The displacement time histories of the rock dike at the top and at the toe were also exposed. It can be noted that during the earthquake there was a significant lateral ground displacement at the upper part of the embankment due to the liquefaction of loose sand. This movement caused displacement at the dike top greater than its displacement at the toe. Consequently, the behavior of the wharf was affected and the pile displacements were important, specially the piles closest to the dike top.

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Section: Materials Model For Structural Elementsmentioning

confidence: 99%

Section: Materials Model For Structural Elementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The influence of the soil constitutive models on the seismic analysis of pile-supported wharf structures with batter piles in cut-slope rock dike

Deghoul

Gabi

Hamrouni

2020

Studia Geotechnica Et Mechanica

View full text Add to dashboard Cite

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“…In addition, design codes recommend that the inertial and kinematic effects should be simultaneously considered (AASHTO 2014;Caltrans 2012). On the basis of an attempt of simulating the centrifuge model test, Souri et al (2018) also demonstrated that full interaction between kinematic and inertial demands could be considered within the shallow depth, which was less than 10 pile diameters below the ground surface.…”

Section: Introductionmentioning

confidence: 99%

Kinematic and Inertial Interaction of Single and Group Piles in Slope by Displacement Phase Relation

Tran

Bong

Kim

2020

Journal of Earthquake Engineering

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This study evaluated the phase relationship among the input motion, ground response, and pile response, which is a key consideration in the analysis of the kinematic-inertial interaction for piles. Dynamic centrifuge tests were conducted on single and group piles embedded in slopes of dry sands. Test results showed that the single pile moved in the opposite phase with the ground movement, whereas the group piles moved nearly in phase. The phase relationship was significantly affected by rocking motion. Therefore, the kinematic force acted as a resistance to the single pile and an additional load to the pile group.

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Inertial and Liquefaction-Induced Kinematic Demands on a Pile-Supported Wharf: Physical Modeling

Cited by 2 publications

References 3 publications

The influence of the soil constitutive models on the seismic analysis of pile-supported wharf structures with batter piles in cut-slope rock dike

The influence of the soil constitutive models on the seismic analysis of pile-supported wharf structures with batter piles in cut-slope rock dike

Kinematic and Inertial Interaction of Single and Group Piles in Slope by Displacement Phase Relation

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