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Simplified approach for soil-spring stiffness prediction of pile group
For deep foundations, several approaches have been developed to represent the effect of soil by using a spring with given stiffness. Typical stiffness values have been proposed for different types and densities of soil. These values generally ignore the effect of the depth and particularly the degradation of soil rigidity with strain. In this paper, a series of 3D numerical analyses are conducted to compute the equivalent soil–spring stiffness as a function of pile distortion for a group of pile located under the central pier of bridge structure above the river Sault–au–Mouton (Longue–Rive, Quebec) and subjected to multi–loading conditions. In these simulations, the degradation of the shear modulus is incorporated in order to account for soil non-linearity. This equivalent stiffness of the soil-springs varies depending on the distortion and may be adapted in an iterative process according to the pile deformation at each depth. The procedure can be compared to the linear equivalent method used in dynamic analysis where an equivalent shear modulus is adapted according to the shear strain. In fact, this type of linear equivalent spring can very useful for structural engineers who want to incorporate the effect of the lateral capacity of soil in their models.
Simplified approach for soil-spring stiffness prediction of pile group
For deep foundations, several approaches have been developed to represent the effect of soil by using a spring with given stiffness. Typical stiffness values have been proposed for different types and densities of soil. These values generally ignore the effect of the depth and particularly the degradation of soil rigidity with strain. In this paper, a series of 3D numerical analyses are conducted to compute the equivalent soil–spring stiffness as a function of pile distortion for a group of pile located under the central pier of bridge structure above the river Sault–au–Mouton (Longue–Rive, Quebec) and subjected to multi–loading conditions. In these simulations, the degradation of the shear modulus is incorporated in order to account for soil non-linearity. This equivalent stiffness of the soil-springs varies depending on the distortion and may be adapted in an iterative process according to the pile deformation at each depth. The procedure can be compared to the linear equivalent method used in dynamic analysis where an equivalent shear modulus is adapted according to the shear strain. In fact, this type of linear equivalent spring can very useful for structural engineers who want to incorporate the effect of the lateral capacity of soil in their models.
Simplified approach for soil-spring stiffness prediction of pile group
Hazzar, Lassaad (Autor:in) / Karray, Mourad (Autor:in) / Pasic, Admir (Autor:in)
International Journal of Geotechnical Engineering ; 16 ; 415-425
21.04.2022
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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