Vertical Vibration of Full-Scale Pile—Analytical and Experimental Study

Manna, Bappaditya; Baidya, Dilip Kumar

doi:10.1061/(asce)gt.1943-5606.0000110

Cited by 51 publications

(17 citation statements)

References 12 publications

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“…Earlier investigations (Hunt et al, 2002;Zhang et al, 2006;Manna and Baidya, 2009;Zhang et al, 2010;Tan and Lan, 2012;Zhang and Chu, 2012;Elkasabgy and El Naggar, 2013;Jardine et al, 2013) have shown that, during pile driving, the soil adjacent to the pile will be severely distorted and the soil outside the immediate vicinity zone will move outwards, with a strain field which may be similar to a cylindrical cavity expansion along the pile shaft and a spherical cavity expansion for the ahead of the pile (Randolph, 2003). At the end of installation, an excess pressure field corresponding to this strain field will appear.…”

Section: Introductionmentioning

confidence: 94%

Longitudinal dynamic response of pile foundation in a nonuniform initial strain field

Tian

Xiao-nan

2014

KSCE J Civ Eng

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This paper presents an investigation into the dynamic response of pile and soil due to pile installation in a radially inhomogeneous initial strain field. The radial variation rule for the shear modulus and physical parameters of the soil caused by the initial strain field is deduced. On the basis of the plane strain and complete P-S (pile-soil) contact assumptions, the analytical solution of longitudinal dynamic impedance of the soil is derived by means of subdividing the soil domain into a number of annular vertical zones. The longitudinal impedance of the pile top and velocity response in frequency and time domains, are also obtained. The parametric study of interfacial pressure on the dynamic response of P-S system is undertaken within a relatively lower frequency domain. Comparison results between previous solutions and the present study indicates that the analytical solution derived in this paper is more stable.

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Section: Introductionmentioning

confidence: 94%

Longitudinal dynamic response of pile foundation in a nonuniform initial strain field

Tian

Xiao-nan

2014

KSCE J Civ Eng

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“…The boundary zone parameters of the weakened zone are adjusted based on the literature (Elkasabgy and El Naggar 2013;Han and Novak 1988;Manna and Baidya 2009;Vaziri and Han 1992) so that theoretical response curves approach towards dynamic test curves. However, there is no specific guideline available in the literature to estimate the actual value of nonlinear parameters for different levels of eccentric moment with depth and soil conditions.…”

Section: Boundary Zone Parametersmentioning

confidence: 99%

Nonlinear Characteristics of Floating Piles Under Rotating Machine Induced Vertical Vibration

2015

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This study presents a finite element based approach to evaluate the linear and nonlinear frequency-amplitude response of floating piles subject to rotating machine induced vertical vibrations. A Matlab program is developed to compute the response of a single pile with floating tip condition for a linear and two nonlinear soil models. The variation of complex soil stiffness parameters with frequency has also been presented using different boundary zone parameters (shear modulus reduction ratio, thickness ratio and damping ratio). A detailed investigation of soil-pile system stiffness and damping parameters has been done considering different values of soil-pile separation lengths and boundary zone parameters. To verify the effectiveness of this proposed approach vertical vibration tests were conducted in the field on a single pile of diameter 0.114 m and length of 2.85 m by constructing floating tip condition. The frequencyamplitude response obtained from field vibration test has been compared with the theoretical results for all the soil models. From the comparison results it is observed that the proposed theory can predict the nonlinear response of floating piles very efficiently with proper inclusion of boundary zone parameters and soil-pile separation lengths.

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“…The dynamic response of these foundations depends on the dynamic impedances (i.e., stiffness and damping) of the supporting piles, which in turn is a function of the pile-soil interaction. Numerous theoretical studies have been conducted to evaluate the dynamic response and impedance functions of piles, including lumped mass models (Penzien 1970;Kuhlemeyer 1981), Winkler models (El Naggar et al 2005), finite element methods (Kuhlemeyer 1979;Manna and Baidya 2009), cone models (e.g., Wolf et al 1992), and the continuum approach (e.g., Baranov 1967). Novak and his co-workers (Novak 1974(Novak , 1977Nogami and Novak 1976;Novak and El Sharnouby 1983) simplified the continuum approach by introducing the plane strain theory for the calculation of the impedance functions of piles.…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of vertically loaded helical and driven steel piles

ElkasabgyMohamed¹,

Hesham

2013

Can. Geotech. J.

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The dynamic performance of helical piles is of significant interest because such piles can offer an efficient alternative to conventional piling systems in many applications where the foundation is subjected to dynamic loads. This paper presents the results of full-scale dynamic vertical load tests on a 9.0 m double-helix, large-capacity helical pile and a driven steel pile of the same length and shaft geometry. Comparing the results is considered necessary to evaluate, qualitatively and quantitatively, the dynamic performance characteristics of large-capacity helical piles. The test piles were closed-ended steel shafts with an outer diameter of 324 mm. The piles were subjected to harmonic (quadratic) loading of different force intensities acting within a frequency range that covered the resonant frequencies of the tested pile-soil-cap systems. The dynamic and static properties of the subsurface soil adjacent to the test piles were determined using the seismic cone penetration technique and the conventional soil boring and testing methods. In addition, field observations are compared with calculated responses using the program DYNA 6 to better understand the pile-soil interaction for the case of helical piles. The effects of soil nonlinearity and pile-soil separation were accounted for in the analysis by employing a weak boundary zone around the piles in the analytical model. The experimental results show that the dynamic behaviour of helical piles is essentially the same as that of driven steel piles with the same geometric properties (without the helix plates). In addition, it was demonstrated that the program DYNA 6 can accurately simulate the behaviour of both helical and driven piles.Résumé : La performance dynamique de pieux hélicoïdaux est d'intérêt significatif puisqu'ils peuvent offrir une alternative efficace aux systèmes de pieux conventionnels dans plusieurs applications où la fondation est soumise à des sollicitations dynamiques. Cet article présente les résultats d'essais de chargement dynamique vertical à l'échelle réelle sur un pieu hélicoïdal à double hélice, de grande capacité, de 9,0 m, et d'un pieu foncé en acier de même longueur et de même géométrie de l'arbre. La comparaison des résultats s'avère nécessaire pour évaluer, qualitativement et quantitativement, les caractéristiques de la performance dynamique de pieux hélicoïdaux de grande capacité. Les pieux d'essai étaient faits d'un arbre d'acier à embouts fermés avec un diamètre externe de 324 mm. Les pieux ont été soumis à des sollicitations harmoniques (quadratiques) de différentes intensités de force agissant à l'intérieur d'une gamme de fréquences qui couvre les fréquences résonnantes des systèmes pieu-sol-cap testés. Les propriétés dynamiques et statiques du sol de fondation adjacent aux pieux d'essai ont été déterminées à l'aide de la technique sismique de pénétration du cône ainsi que par des méthodes conventionnelles de forage et d'essais de sol. De plus, les observations de terrain sont comparées aux résultats calculés avec le progr...

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Vertical Vibration of Full-Scale Pile—Analytical and Experimental Study

Cited by 51 publications

References 12 publications

Longitudinal dynamic response of pile foundation in a nonuniform initial strain field

Longitudinal dynamic response of pile foundation in a nonuniform initial strain field

Nonlinear Characteristics of Floating Piles Under Rotating Machine Induced Vertical Vibration

Dynamic response of vertically loaded helical and driven steel piles

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