Dynamic Experiments on Two Pile Groups
Publication: Journal of Geotechnical Engineering
Volume 118, Issue 4
Abstract
Field experiments are conducted on two groups of piles supporting rigid foundations and subjected to harmonic loading. The objective is to investigate the ability of linear elastic theories of pile‐group modeling to predict the responsecurve characteristics including the resonant frequency and amplitude. The first pile group consists of six steel pipes of length 3.05 m and outside diameter of 0.102 m driven in a layer of cohesionless soil. The second group consists of six cast‐in‐place concrete piles 7 m in length and 0.32 m in diameter constructed in a clay site. The response is measured at different levels of excitation force amplitudes. Moderate nonlinear behavior is observed. The group stiffness and damping required to generate the theoretical response curves are established using an approximate method based on combining the plane strain soil reactions solution of the single pile with dynamic pile‐soil‐pile interaction factors. The theoretical results are also verified using the more rigorous direct analysis approach. Comparison with experiments shows that the linear theory gives a good estimate of the group stiffness but over estimates the group damping.
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References
1.
Blaney, G. W., Muster, G. L., and O'Neill, M. W. (1987). “Vertical vibration test of a full‐scale pile group.” Geotechnical Special Publication No. 11, ASCE, 149–165.
2.
Crouse, C. B., and Cheang, L. (1987). “Dynamic testing and analysis of pile‐group foundations.” Geotechnical Special Publication No. 11, ASCE, 79–98.
3.
Dotson, K. W., and Veletsos, A. S. (1990). “Vertical and torsional impedances for radially inhomogeneous viscoelastic soil layers.” Solid Dynamics and Earthquake Engrg., 9(3), 110–119.
4.
El‐Sharnouby, B., and Novak, M. (1984). “Dynamic experiments with group of piles.” J. Geotech. Engrg., ASCE, 110(6), 719–737.
5.
El‐Sharnouby, B., and Novak, M. (1985). “Static and low frequency response of pile groups.” Canadian Geotech., 22(l), 79–94.
6.
El‐Sharnouby, B., and Novak, M. (1986). “Flexibility coefficients and interaction factors for pile group analysis.” Canadian Geotech. J., 23(4), 441–450.
7.
Gohl, W. B. (1990). “Response of pile foundations in simulated earthquake loading: Experimental and analytical results,” thesis presented to the University of British Columbia, at Vancouver, British Columbia, Canada, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
8.
Han, Y. C., and Novak, M. (1988). “Dynamic behaviour of single piles under strong harmonic excitation.” Canadian Geotech. J., 25(3), 523–534.
9.
Hassini, S., and Woods, R. D. (1989). “Dynamic experiments with model pile foundations.” Proc. 12th ICSMFE, 2, 1135–1138.
10.
Hijikata, K., Miura, K., Miyamoto, Y., and Moroi, T. (1990). “Dynamic characteristics of pile‐groups foundation.” Proc. of lap an Conference of Structural Division in Architecture, 408, 89–98 (in Japanese).
11.
Janes, M., and Novak, M. (1989). “Pile group response to large lateral loads.” Proc. 42nd Canadian Geotechnical Conf., Canadian Geotechnical Society, Oct., 216–222.
12.
Kaynia, A. M. (1988). “Characteristics of the dynamic response of pile groups in homogeneous and nonhomogeneous media. Proc. Ninth World Conference on Earthquake Engineering, Aug. 2‐9, III, 575–580.
13.
Kaynia, A. M., and Kausel, E. (1982). “Dynamic behaviour of pile groups.” Conf. on Num. Methods in Offshore Piling, University of Texas, 509–532.
14.
Kobayashi, K., Yao, S., and Yoshiada, N. (1991). “Dynamic compliance of pile group considering nonlinear behaviour around piles.” Proc. 2nd Int. Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics, 1, University of Missouri‐Ralla, 785–792.
15.
Kobori, T., Nakazawa, M., Hijikata, K., Kobayashi, Y., Miura, K., Miyamoto, Y., and Moroi, T. (1991). “Study on dynamic characteristics of a pile group foundation.” Proc. of 2nd Int. Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics, 1, (Mar.), University of Missouri‐Ralla, 853–860.
16.
Masuda, K., Saseki, F., Urao, K., Veno, K., and Miyamoto, Y. (1986). “Simulation analysis of forced vibration test of actual pile foundation by thin layer method.” Proc. Annual Meeting of Arch. Inst. of Japan, Architectural Institute of Japan.
17.
Novak, M. (1974). “Dynamic stiffness and damping of piles.” Canadian Geotech. J., 11(4), 574–598.
18.
Novak, M. (1991). “Piles under dynamic loads.” Proc. of 2nd Int. Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics, 3, (Mar.), University of Missouri‐Ralla, 250–273.
19.
Novak, M. and Aboul‐Ella, F. (1978). “Impedance functions of piles in layered media.” J. Engrg. Mech. Div., ASCE, 104(3), 643–661.
20.
Novak, M., and Grigg, R. F. (1976). “Dynamic experiments with small pile foundations.” Canadian Geotech. J., 13(4), 372–385.
21.
Novak, M. and Han, Y. (1990). “Impedances of soil layer with boundary zone.” J. Geotech. Engrg., 116(6), 1008–1014.
22.
Novak, M., and Mitwally, H. (1990). “Random response of offshore towers with pile‐soil‐pile interaction.” J. of Offshore Mech. and Arctic Engrg., (Feb.) 112, 35–41.
23.
Novak, M. and Sheta, M. (1980). “Approximate approach to contact problems of piles.” Proc., Geotechnical Engineering Division, ASCE National Convention, October, 53–79.
24.
Novak, M., Sheta, M., El Hifnawy, L., El‐Marsafawi, H., and Ramadan, O. (1990). “DYNA3—a computer program for calculation of foundation response to dynamic loads.” Report No. GEOP 90‐02, Geotech. Res. Ctr., The Univ. of Western Ontario, London, Ontario, Canada.
25.
Poulos, H. G. (1968). “Analysis of the settlement of pile groups.” Geotechnique, London, England, 18(4), 449–471.
26.
Poulos, H. G., and Davis, E. H. (1980). Pile foundation analysis and design. John Wiley & Sons, New York, N.Y.
27.
Randolph, M. F. (1981). “The response of flexible piles to lateral loading.” Geotechnique, London, England, 31(2), 247–259.
28.
Sheta, M., and Novak, M. (1982). “Vertical vibration of pile groups.” J. Geotech. Engrg. Div., ASCE, 108(4), 570–590.
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Copyright © 1992 ASCE.
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Published online: Apr 1, 1992
Published in print: Apr 1992
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