Wak Test To Find Spread Footing Stiffness
Publication: Journal of Geotechnical Engineering
Volume 116, Issue 3
Abstract
A method is described to obtain the static stiffness of the soil under a spread footing by using a hammer impact test. In the first part, the analytical background is presented. In the second part, a test setup is described and the associated results are discussed. The test consists of placing two geophones on the footing, hitting the footing with the instrumented hammer, and recording the force time and velocity time signals. The paper shows that the static stiffness obtained in a load test and the stiffness obtained from the impact test by Fourier transform analysis are reasonably close.
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References
1.
Amar, S., Baguelin, F., and Canepa, Y. (1984). “Etude experimentale du comportement des fondations superficielles.” Annates de l' ITBTP, 427, Series Sols et Fondations, 189, Paris, France, Sept. (in French).
2.
Bendat, J. S., and Piersol, A. G. (1980). Engineering applications of correlation and spectral analysis. John Wiley & Sons, New York, N.Y., 302.
3.
Brigham, E. O. (1974). The fast Fourier transform. Prentice‐Hall, New York, N.Y.
4.
Clough, R. W., and Penzien, J. (1975). Dynamics of structures. McGraw‐Hill Book Co., New York, N.Y.
5.
Lysmer, J., and Richart, F. E., Jr. (1966). “Dynamic response of footings to vertical loading.” J. Soil Mech. and Found. Div., ASCE, 92(1), 65–91.
6.
Paquet, J. (1968). “Etude vibratoire des pieux en beton; reponse harmonique et impulsionnelle; application au controle.” Annates de l' Institut Technique du Batiment et des Travaux Publics, 245, 789–803(in French).
7.
Seed, H. B., and Idriss, I. M. (1970). “Soil moduli and damping factors for dynamic response analysis.” EERC Report No. 70‐10, Berkeley.
8.
Stokoe, K. H., Olson, L. D., and Reese, L. D. (1987). “Integrity testing of drilled shafts.” Geotech. Engrg. Faculty Workshop Proc., Int. Assoc. of Drilled Shaft Contractors, Fort Collins, Colo., Jul.
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Copyright © 1990 ASCE.
History
Published online: Mar 1, 1990
Published in print: Mar 1990
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