Commenced in January 2007
Paper Count: 31440
Influence of Pile Radius on Inertial Response of Pile Group in Fundamental Frequency of Homogeneous Soil Medium
Abstract:An efficient method is developed for the response of a group of vertical, cylindrical fixed-head, finite length piles embedded in a homogeneous elastic stratum, subjected to harmonic force atop the pile group cap. Pile to pile interaction is represented through simplified beam-on-dynamic-Winkler-foundation (BDWF) with realistic frequency-dependent springs and dashpots. Pile group effect is considered through interaction factors. New closed-form expressions for interaction factors and curvature ratios atop the pile are extended by considering different boundary conditions at the tip of the piles (fixed, hinged). In order to investigate the fundamental characteristics of inertial bending strains in pile groups, inertial bending strains at the head of each pile are expressed in terms of slenderness ratio. The results of parametric study give valuable insight in understanding the behavior of fixed head pile groups in fundamental natural frequency of soil stratum.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1130373Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 813
 Novak M. Dynamic Stiffness and Damping of piles. Can Geo Jour 1974, Vol.11, No.5, pp.574-598.
 Novak M, and Aboul-Ella F. Impedance Functions of Piles in Layered Media.Jour of The Engrg Mech Division 1978 Vol. 104, No. 3, pp. 643-661.
 Kaynia AM, Kausel E. Dynamic stiffness and seismic response of pile groups. Research report no. R82-03. Cambridge, MA: Massachusetts Institute of Technology; 1982.
 Sen R, Kausel E, and Banerjee P.K. Dynamic analysis of piles and pile groups embedded in nonhomogeneous soil. Int. Num. Anal. Meth. Geomech. 1985, 9:507-524.
 Blaney G.W., Kausel E. and Roesset J.M. Dynamic stiffness of piles, proc. 2^nd Intern. Conf. On Num. Methods in Geom., Blacksburg, Virginia 1976, pp.1001-1012.
 Wolf J.P., Von Arx G.A. Horizontally Travelling Waves in Group of Piles Taking Pile-Soil-Pile Interaction into Account, Intern Jour of Earthquake Engrg and Stru Dyn 1982, Vol. 10.pp. 225-273.
 Makris N, Gazetas G. Dynamic pile-soil-pile interaction. Part II: Lateral and seismic response. Earthquake Engineering And Structural Dynamics 1992; 21(2):145-62.
 Saitoh M. Fixed-head pile bending by kinematic interaction and criteria for its minimization at optimal pile radius. Journal of Geotechnical and Geoenvironmental Engineering 2005; 131 (10):1243-1251.
 Mylonakis G, Nikolaou A.S. Soil-pile-bridge seismic interaction: kinematic and inertial effects. Part I: soft soil. Earthquake Engineering and Structural Dynamics 1997; 26:337-359.
 Mylonakis G. Elastodynamic model for large-diameter end-bearing shafts. J Jpn Geotech Soc: Soils Found 2001;41(3);31-44.
 Takewaki I, Kishida A. Efficient analysis of pile-group effect on seismic stiffness and strength design of buildings, Soil Dynamics and Earthquake Engineering 2005; 25(5): 355-367.
 Mylonakis G, Gazetas G. Lateral Vibration And Inertial Forces of Grouped Piles In Layered Soil. Journal of Geotechnical and Geoenvironmental Engineering 1999; 125: 16-25.