Probabilistic analysis of piled earth platform under concrete floor slab

Hamrouni, Adam; Dias, Daniel; Sbartai, Badreddine

doi:10.1016/j.sandf.2017.08.012

Cited by 19 publications

(5 citation statements)

References 27 publications

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“…The above equation describes how to find the next point of n i during the iteration algorithm based on the Hessian matrix of the Lagrange function H, the gradient of the limit state function G, and the correlation matrix of the random variables R. As shown in Equation 5, the computation of H requires the Hessian matrix of the limit state function as well as the value of λ. To simplify the calculation, we replace H in Equation 11 with the first term on the right side of Equation 5, ie, R −1 . In such a case, Equation 11 can be simplified as follows:…”

Section: Suggested Optimization Methodsmentioning

confidence: 99%

“…To simplify the calculation, we replace H in Equation 11 with the first term on the right side of Equation 5, ie, R −1 . In such a case, Equation 11 can be simplified as follows:…”

Section: Suggested Optimization Methodsmentioning

confidence: 99%

“…Uncertainties are pervasive in geotechnical engineering. [1][2][3][4][5] During the past decades, probabilistic methods are increasingly being used in geotechnical engineering, [6][7][8][9][10][11] in which uncertain variables are modeled as random variables, and the performance of the geotechnical system is measured in terms of the failure probability. Various methods can be used for geotechnical reliability analysis, such as the point estimate method, 12,13 first-order reliability method (FORM), 14,15 second order reliability method, 16,17 and Monte Carlo simulation.…”

Section: Introductionmentioning

confidence: 99%

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A FORM‐based approach for probabilistic analysis in geotechnics: Application to a reinforced concrete drainage culvert

Zhang

Zheng

Cai

et al. 2019

Num Anal Meth Geomechanics

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Summary As numerical models are increasingly used as a design tool in geotechnical engineering, it is highly desirable if geotechnical reliability analysis can be conducted based on numeral models. Currently, the practical use of geotechnical reliability analysis‐based numerical models is still quite limited. In this study, an easy to access method is derived to conduct geotechnical reliability analysis based on numerical models. To facilitate its application, a procedure is outlined to implement the suggested method such that geotechnical reliability analysis can be automated using existing geotechnical numerical packages. The procedure is illustrated in detail with an example, and the source codes provided can be easily adapted to analyze other similar problems. The method described in this paper is used to study the reliability of a deteriorating reinforced concrete drainage culvert in Shanghai, China. The suggested method provides a convenient means for reliability analysis of complex geotechnical problems.

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Section: Suggested Optimization Methodsmentioning

confidence: 99%

“…To simplify the calculation, we replace H in Equation 11 with the first term on the right side of Equation 5, ie, R −1 . In such a case, Equation 11 can be simplified as follows:…”

Section: Suggested Optimization Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A FORM‐based approach for probabilistic analysis in geotechnics: Application to a reinforced concrete drainage culvert

Zhang

Zheng

Cai

et al. 2019

Num Anal Meth Geomechanics

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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%

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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Assessment of deflection of pile implanted on slope by artificial neural network

Goudjil

Arabet

2020

Neural Comput & Applic

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Probabilistic analysis of piled earth platform under concrete floor slab

Cited by 19 publications

References 27 publications

A FORM‐based approach for probabilistic analysis in geotechnics: Application to a reinforced concrete drainage culvert

A FORM‐based approach for probabilistic analysis in geotechnics: Application to a reinforced concrete drainage culvert

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

Assessment of deflection of pile implanted on slope by artificial neural network

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