Single Piles and Pile Groups Under Lateral Loading

Reese, Lymon C.; Impe, William F. Van

doi:10.1201/b17499

Cited by 123 publications

(127 citation statements)

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“…Matlock [44] and Reese [45] proposed E s /c u values between 40 and 200. Much higher E s /c u values are reported by others at small strain levels [46]. Table III lists the values of E s at different values of c u suggested by USACE [49], with average E s /c u values between 200 and 500, higher E s /c u corresponding to larger c u .…”

Section: Modulus Of Horizontal Subgrade Reaction K Hmentioning

confidence: 84%

“…The elastic modulus E s is commonly determined from the undrained shear strength c u if the ratio E s /c u is known. There are different suggestions in the literature for determining E s /c u , depending on the soil properties and the strain level [42,[44][45][46][47][48][49]. Matlock [44] and Reese [45] proposed E s /c u values between 40 and 200.…”

Section: Modulus Of Horizontal Subgrade Reaction K Hmentioning

confidence: 99%

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Nonlinear analysis of laterally loaded rigid piles in cohesive soil

Zhang

Ahmari

2011

Num Anal Meth Geomechanics

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SUMMARYThis article presents a method for the nonlinear analysis of laterally loaded rigid piles in cohesive soil. The method considers the force and the moment equilibrium to derive the system equations for a rigid pile under a lateral eccentric load. The system equations are then solved using an iteration scheme to obtain the response of the pile. The method considers the nonlinear variation of the ultimate lateral soil resistance with depth and uses a new closed-form expression proposed in this article to determine the lateral bearing factor. The method also considers the horizontal shear resistance at the pile base, and a bilinear relationship between the shear resistance and the displacement is used. For simplicity, the modulus of horizontal subgrade reaction is assumed to be constant with depth, which is applicable to piles in overconsolidated clay. The nonlinearity of the modulus of horizontal subgrade reaction with pile displacement at ground surface is also considered. The validity of the developed method is demonstrated by comparing its results with those of 3D finite element analysis. The applications of the developed method to analyze five field test piles also show good agreement between the predictions and the experimental results. The developed method offers an alternative approach for simple and effective analysis of laterally loaded rigid piles in cohesive soil.

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Section: Modulus Of Horizontal Subgrade Reaction K Hmentioning

confidence: 84%

Section: Modulus Of Horizontal Subgrade Reaction K Hmentioning

confidence: 99%

Nonlinear analysis of laterally loaded rigid piles in cohesive soil

Zhang

Ahmari

2011

Num Anal Meth Geomechanics

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“…The SSI effect was modelled using static or cyclic p‐y curves recommended in DNV 2014 and API standards, and the steps to establish the p‐y curves are detailed in Reese and Van Impe . Although it would seem more sensible to use the cyclic curves to represent the SSI of an OWT under long‐term excitations, both static and cyclic p‐y curves were used to allow comparison with published results.…”

Section: Soil Dampingmentioning

confidence: 99%

Modelling damping sources in monopile‐supported offshore wind turbines

Chen

Duffour

2018

Wind Energy

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Vibration damping in offshore wind turbines is a key parameter to predict reliably the dynamic response and fatigue life of these systems. Damping in an offshore wind turbine originates from different sources, mainly, aerodynamic, structural, hydrodynamic, and soil dampings. The difficulties in identifying the individual contribution from each damping source have led to considerable uncertainty and variation in the values recommended. This paper proposes simplified but direct modelling approaches to quantify the damping contributions from the aerodynamic, hydrodynamic, and soil interactions. Results from these models were systemically compared to published values and when appropriate with simulation results from the software package FAST.The range of values obtained for aerodynamic damping confirmed those available in the literature, and blade element modelling theory was shown to provide good results relatively efficiently. The influence of couplings between fore-aft and side-side directions on the aerodynamic damping contribution was highlighted. The modelling of hydrodynamic damping showed that this damping is much smaller than usually recommended and could be safely ignored for offshore wind turbines. Soil damping strongly depends on the soil specific nonlinear behaviour.

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“…The use of linear elastic analysis in the laterally loaded pile problem, especially in the prediction of deformations at working stress levels, has become a widely accepted model in geotechnical engineering. Also in the real problem where nonlinear stress-strain relationships for the soil must be used, linear elastic solution provides the framework for the analysis, in which the elastic properties of the soil will be changed with the changing deformation of the soil mass (e.g., the "p-y" method [10]). In this paper, this Beam-on-linear-elastic-foundation model is the basis for the finite element formulation of the laterally loaded pile problem which will be presented in the next section.…”

Section: Model Of Analysismentioning

confidence: 99%

Fuzzy analysis of laterally-loaded pile in layered soil

Pham

2014

Vietnam J. Mech.

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A fuzzy finite-element method for analysis of laterally loaded pile in multi-layer soil with uncertain properties is presented. The finite-element formulation is established using a beam-on-two-parameter foundation model. Uncertainty propagation of the soil parameters to the pile response is evaluated by a perturbation technique. This approach requires a few number of classical finite-element equations to be solved and provides reasonable results. A comparison with vertex method is made in a numerical example.

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Single Piles and Pile Groups Under Lateral Loading

Cited by 123 publications

References 0 publications

Nonlinear analysis of laterally loaded rigid piles in cohesive soil

Nonlinear analysis of laterally loaded rigid piles in cohesive soil

Modelling damping sources in monopile‐supported offshore wind turbines

Fuzzy analysis of laterally-loaded pile in layered soil

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