Vertical and Torsional Vibration of Foundations in Inhomogeneous Media
Publication: Journal of Geotechnical Engineering
Volume 114, Issue 9
Abstract
A study of the dynamic impedances for radially inhomogeneous, infinite viscoelastic layers with a circular hole, and for piles embedded in a medium represented by such layers is made. Systems in vertical and torsional modes of vibration are examined considering both a discontinuous variation in shear modulus and an exponentially increasing, continuous variation. The results are evaluated over wide ranges of the parameters involved and compared with those obtained for a homogeneous layer. In addition, the harmonic response of strip foundations supported at the surface of a vertically inhomogeneous viscoelastic half‐space is examined, and it is shown that within the framework of a previously proposed approximation, the impedances of such foundations for both horizontal and vertical modes of vibration may be deduced from those obtained for the vertically excited, radially inhomogeneous layer.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Gazetas, G., and Dobry, R. (1984). “Simple radiation damping model for piles and footings.” J. Engrg. Mech., ASCE, 110(6), 937–956.
2.
Gazetas, G., and Ng, T. P. (1985). “Simplified model for impedances of footings on layered deposits.” Proc., 2nd Int. Conference on Soil Dynamics, Springer‐Verlag, 4, 37–50.
3.
Gazetas, G., and Roesset, J. M. (1979). “Vertical vibration of machine foundations.” J. Geotech. Engrg. Div., ASCE, 105(GT12), 1435–1454.
4.
Lakshmanan, N., and Minai, R. (1981). “Dynamic soil reactions in radially non‐homogeneous soil media.” Bull. Disaster Prev. Res. Inst. Kyoto Univ., 31(279), 79–114.
5.
Novak, M. (1974). “Dynamic stiffness and damping of piles.” Can. Geotech. J., 11(4), 574–598.
6.
Novak, M. (1977). “Vertical vibration of floating piles.” J. Engrg. Mech. Div., ASCE, 103(EM1), 153–168.
7.
Novak, M., and Beredugo, Y. O. (1972). “Vertical vibration of embedded footings.” J. Soil Mech. and Foundations Div., ASCE, 98 (SM12), 1291–1310.
8.
Novak, M., and Howell, J. F. (1977). “Torsional vibration of pile foundations.” J. Geotech. Engrg. Div., ASCE, 103(GT4), 271–285.
9.
Novak, M., and Sheta, M. (1980). “Approximate approach to contact effects of piles,” Special technical publication on dynamic response of pile foundations: Analytical aspects, O'Neill and Dobry, eds., ASCE, 53–79.
10.
Novak, M., Nogami, T., and Aboul‐Ella, F. (1978). “Dynamic soil reactions for plane strain case.” J. Engrg. Mech. Div., ASCE, 104 (EM4), 953–959.
11.
Poulos, H. G., and Davis, E. H. (1980). Pile foundation analysis and design, John Wiley and Sons, Inc., New York, N.Y. 86–89, 237–238.
12.
Veletsos, A. S., and Dotson, K. W. (1986). “Impedances of soil layer with disturbed boundary zone.” J. Geotech. Engrg., ASCE, 112(3), 363–368.
Information & Authors
Information
Published In
Copyright
Copyright © 1988 ASCE.
History
Published online: Sep 1, 1988
Published in print: Sep 1988
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.