EARTHQUAKE ANALYSIS OF THE LOWER SAN FERNANDO DAM USING ELASTIC, EQUIVALENT LINEAR AND BOUNDING SURFACE PLASTICITY MODELS
Main Article Content
Abstract
Uncoupled behaviour of a dam undd, earthquake loading is investigated. Three constitutive models are used:. The linear-elastic model where soil properties; shear modulus and damping ratio are strains ar d cycle independent.-The equivalent linear model where soil properties are strain dependent but cycle independert. The shear modulus tends to decrease as the shear strain increases, while the damping ratio tends to increase as the shear strain increases. - A non-linear model where soil properties tend to change not only with shear strain but also with the progression of cycles. In this work, the bounding surface model is used.For these studies, three kinds of umerical integration methods in the time domain are usel. namely, Newmark, Wilson-0 and the a-methods with different damping ratios, In this study, the bounding surface plasticity model visualizes the realistic behaviour of the dam under the dynamic loading rather than the equivalent linear and the elastic linear models
Article Details
Section
How to Cite
References
Al-Assady, A. M. (1998). Effect T Anisotropy on Two-Dimensional Consolidation of Clayey Soil, M.Sc. Thesis, University of Baghdad, Iraq
Al-Sarraf, M. A. H., (1999). Cone Penetration in Clay, M.Sc. Thesis, College of Engineering,university of Baghdad
Ambraseys, N. N., (1993), On the Seismic Behaviour of Earth Dams, Proceeding, 2nd World Conference on Earthquake Engineering, Tokyo, Vol. 1, PP. 331-345, 1960, as cited by Das..
Bureau of Reclamation, US Department of Interior, (1986). Dynamic Effective Stress Fini'e Element Analysis of Dams Subjected to Liquefaction, December,.
Gazetas, G. Debchaudhury, A., and Gasparini, D. A. (1982). Stochastic Estimation of the Nonlinear Response of Earth Dams to Strong Earthquakes. Soil Dynamics and Earthquake Engineering, Vol. 1, No.1
Kaliakin. V. N., and Hermann, L. R., (1989), Guidelines for Implementing the Elastoplastic-Viscoplastic Bounding Surface Model for Isotropic Cohesive Soils. University of California, Davis,
Levadoux, J. N., (1980). Pore Pressure in Clays Due to Cone Penetration, Ph.D. Thesis, MIT Cambridge.
Molenkamp, F. and Smith, M., (1980), Hysteretic and Viscous Material Damping. International Journal for Numerical and Analytical Methods in Geomechanics, Vol 4, pp.293-311.
Okamoto, S. (1973), Introduction to Earthquake Engineering, University of Tokyo Press.
Pande, GN, and Zienkiewicz, O C., (1982), Soil Mechanics- Transient and Cyclic Loads, John Wiley & Sons...
Schnable, P. B., Lysmer. J., and Seed H. B.. (1972). SHAKE, a Computer Program for Earthquak: Response Analysis of Horizontally Layered Sites. Report No. EERC 70-12, Earthquak: Engineering Research Center, University of California, Berkeley, December,
Seed, H. B., Makdisi, F. I., and De Alba, P., (1978). Performance of Earth Dams During Earthquakes, Journal of the Geotechnical Engineering Division, ASCE, Vol.104, No. GT,PP.967-994,
Singh, D. S., (1990). Theory of Plasticity, Khanna Publishers, Second Edition..
Whiteside, S. L., France, J. W. and Castro, G., (1986). "Report on Dynamic Analysis of La Fortuna Dam. Volumes 2 and 5, Geotechnical Engineers, Inc., 1979, as cited by Bureau of Reclamation, US Department of Interior.
Whittle, A. J. Degroot, D. J., Ladd, C. C., and Seah, T. 1L, (1994), Model Prediction of Anisotropic Behaviour of Boston Blue Clay. Journal of Geotechnical Engineering, Vol.120, No.pp.199-224,