Effect of Degradation on Seismic Response of Israeli Continental Slope
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 123, Issue 2
Abstract
Seismic site response analyses are often carried out using constitutive models for soil behavior under cyclic loading that incorporate Masing rules. In such analyses the effect of cyclic degradation of stiffness and strength on the seismic response of horizontal, soft clay strata is often ignored. In a recent publication, the authors have proposed a normalized form of the shear stress-strain relationship for undrained, cyclic simple shear of soft clay. Cyclic degradation is accounted for through a single fatigue parameter—the mean effective stress, utilized in normalization of stresses and strains. Cyclic degradation of the small strain shear modulus is neglected, i.e. the stiffness degrades only due to strength degradation. This normalized model has been combined with an effective stress model for simple shear loading and boundary conditions, developed within the framework of bounding surface kinematic and isotropic hardening plasticity, to provide an overall model that may be used in site response analysis. In the present paper, this model is utilized in one-dimensional propagation analysis to compare the expected response in a soft clay profile (comprising the Israeli continental slope) to that that would be predicted without accounting for cyclic degradation. Neglect of cyclic degradation is shown to be nonconservative, resulting in underestimation of velocities and accelerations developed in the profile.
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References
1.
Chen, J. C.(1982). “Application of modulus degradation model of clays.”J. Geotech. Engrg., ASCE, 108(10), 1203–1214.
2.
Dafalias, Y. F., and Herrmann, L. R. (1982). “Bounding surface formulation of soil plasticity.”Soil mechanics—transient and cyclic loading, G. N. Pande and O. C. Zienkiewicz, eds., John Wiley & Sons, Inc., New York, N.Y., 253–282.
3.
Finn, W. D. L., Lee, K. W., and Martin, G. R.(1978). “An effective stress model for liquefaction.”J. Geotech. Engrg., ASCE, 103(6), 517–532.
4.
Frydman, S., Talesnick, M., Almagor, G., and Wiseman, G.(1988). “Simple shear testing for the study of the earthquake response of clay from the Israeli continental slope.”Marine Geotechnol., 7(3), 143–171.
5.
Ghaboussi, J., and Momen, H. (1982). “Modeling and analysis of cyclic behavior of sands.”Soil mechanics—transient and cyclic loading, G. N. Pande and O. C. Zienkiewicz, eds., John Wiley & Sons, Inc., New York, N.Y., 313–342.
6.
Idriss, I. M., and Seed, H. B.(1968). “Seismic response of horizontal soil layers.”J. Soil Mech. and Found., ASCE, 94(4), 1003–1031.
7.
Idriss, I. M., Dobry, R., and Singh, R. D.(1978). “Nonlinear behavior of soft clays during cyclic loading.”J. Geotech. Engrg., ASCE, 104(12), 1427–1447.
8.
Ishihara, K., and Towhata, I. (1982). “Dynamic response analysis of level ground based on the effective stress method.”Soil mechanics—transient and cyclic loadings, G. N. Pande and O. C. Zienkiewicz, eds., John Wiley & Sons, Inc., New York, N.Y., 133–172.
9.
Iwan, W. D.(1967). “On a class of models for the yielding behavior of continuous and composite systems.”J. Appl. Mech., 34(3), 612–617.
10.
Jardine, R. J.(1992). “Some observations of the kinematic nature of soil stiffness.”Soils and Found., 32(2), 111–124.
11.
Joyner, W. T., and Chen, A. T. F.(1975). “Calculation of non-linear ground response in earthquakes.”Bull. Seismic Soc. Am., 65(5), 1315–1336.
12.
Kanai, K.(1952). “Relation between a nature of surface layer and the amplitudes of earthquake motions.”Bull. Earthquake Res. Inst., Tokyo, Japan, 30(2), 31–37.
13.
Lee, M. K. W., and Finn, W. D. L. (1978). “DESRA-2, dynamic effective stress response analysis of soil deposits with energy transmitting boundary including assessment of liquefaction potential.”Soil Mech. Ser. No. 38, Dept. of Civ. Engrg., Univ. of British Columbia, Vancouver, B.C., Canada.
14.
Lysmer, J., and Kuhlemeyer, R. L.(1969). “Finite dynamic model for infinite media.”J. Engrg. Mech. Div., ASCE, 95(4), 859–877.
15.
Matasovic, N., and Vucetic, M.(1995). “Generalized cyclic degradation-pore pressure generation model for clays.”J. Geotech. Engrg., ASCE, 121(1), 33–42.
16.
Moriwaki, Y., Idriss, I. M., and Doyle, E. H.(1982). “Earthquake-induced deformations of soft clay slopes.”J. Geotech. Engrg., ASCE, 108(11), 1475–1493.
17.
Mroz, Z., Norris, V. A., and Zienkiewicz, O. C.(1978). “An anisotropic hardening model for soils and its application to cyclic loading.”Int. J. Num. and Anal. Methods in Geomech., 2(3), 203–221.
18.
Mroz, Z., Norris, V. A., and Zienkiewicz, O. C.(1979). “Application of anisotropic elastoplastic deformation of soils.”Geotechnique, London, England, 29(1), 1–34.
19.
Norris, V. A. (1986). “Numerical modeling of soils response to cyclic loading using `stress-reversal surfaces.”' Geomechanical modeling in engineering practice, R. Dungar and J. A. Studer, eds., A. A. Balkema, Rotterdam, The Netherlands, 241–245.
20.
Nova, R., and Hueckel, T. (1980). “A `geotechnical' stress variables approach to cyclic behavior of soils.”' Proc., Int. Symp. on Soils Under Cyclic and Transient Loading, A. A. Balkema, Rotterdam, The Netherlands, 301–314.
21.
Pande, G. N., and Pietruszczak, S. (1986). “A critical look at constitutive models for soils.”Geomechanical Modeling in Engineering Practice, R. Dungar and J. A. Studer, eds., A. A. Balkema, Rotterdam, The Netherlands, 369–395.
22.
Prevost, J. H.(1978). “Plasticity theory for soil stress-strain behaviour.”J. Engrg. Mech., ASCE, 104(5), 1177–1194.
23.
Puzrin, A., Frydman, S., and Talesnick, M.(1995a). “Normalized nondegrading behavior of soft clay under cyclic simple shear loading.”J. Geotech. Engrg., ASCE, 121(12), 836–843.
24.
Puzrin, A., Frydman, S., and Talesnick, M.(1995b). “Kinematic hardening of soft clay in simple shear.”Int. J. Num. and Anal. Meth. in Geomech., 19(11), 769–791.
25.
Pyke, R.(1979). “Nonlinear soil models for irregular cyclic loadings.”J. Geotech. Engrg., ASCE, 105(6), 715–726.
26.
Richtmyer, R. D., and Morton, K. W. (1967). Difference methods for initial value problems. Interscience, New York, N.Y.
27.
Schnabel, P. B., Lysmer, J., and Seed, H. B. (1972). “SHAKE: a computer program for earthquake response analysis of horizontally layered sites.”Rep. UCB/EERC-71/12, Earthquake Engrg. Ctr., Univ. of California at Berkeley, Calif.
28.
Seed, R. B., Dickenson, S. E., and Mock, C. M. (1992). “Recent lessons regarding seismic response analysis of soft and deep clay sites.”Proc., 4th Japan–U.S. Workshop on Earthquake Resistant Des. of Lifeline Fac. and Countermeasures for Soil Liquefaction, Rep. NCEER-92-0019, State Univ. of New York at Buffalo, N.Y.
29.
Singh, R. D., Dobry, R., Doyle, E. H., and Idriss, I. M.(1981). “Nonlinear seismic response of soft clay sites.”J. Geotech. Engrg., ASCE, 107(9), 1201–1218.
30.
Streeter, V. L., Wylie, E. B., and Richart, F. E.(1974). “Soil motion computations by characteristics method.”J. Geotech. Engrg. Div., ASCE, 100(3), 247–263.
31.
Sun, J. I., Golesorkhi, R., and Seed, H. B. (1988). “Dynamic moduli and damping ratios for cohesive soils.”Rep. UCB/EERC-88/15, Univ. of California at Berkeley, Calif.
32.
Thomson, W. T. (1950). “Transmission of elastic waves through a stratified solid medium.”J. Appl. Phys., 21(2).
33.
Tsai, C.-F., Lam, I., and Martin, G. R.(1980). “Seismic response of cohesive marine soils.”J. Geotech. Engrg., ASCE, 106(9), 997–1012.
34.
Vucetic, M.(1994). “Cyclic threshold shear strains in soils.”J. Geotech. Engrg., ASCE, 120(12), 2208–2228.
35.
Whittle, A. J.(1993). “Evaluation of a constitutive model for overconsolidated clays.”Geotechnique, London, England, 43(2), 289–313.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 123 • Issue 2 • February 1997
Pages: 85 - 93
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Feb 1, 1997
Published in print: Feb 1997
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