Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/49172
Título: Three-dimensional models of reservoir sediment and effects on the seismic response of arch dams
Autores/as: Maeso, O. 
Aznárez, J. J. 
Domínguez, J.
Palabras clave: Concrete Gravity Dams
Foundation Rock Interaction
Earthquake Analysis
Dynamic Poroelasticity
Fecha de publicación: 2004
Editor/a: 0098-8847
Publicación seriada: Earthquake Engineering and Structural Dynamics 
Resumen: The important effects of bottom sediments on the seismic response of arch dams are studied in this paper. To do so, a three-dimensional boundary element model is used. It includes the water reservoir as a compressible fluid, the dam and unbounded foundation rock as viscoelastic solids, and the bottom sediment as a two-phase poroelastic domain with dynamic behaviour described by Biot's equations. Dynamic interaction among all those regions, local topography and travelling wave effects are taken into account. The results obtained show the important influence of sediment compressibility and permeability on the seismic response. The former is associated with a general change of the system response whereas the permeability has a significant influence on damping at resonance peaks. The analysis is carried out in the frequency domain considering time harmonic excitation due to P and S plane waves. The time-domain results obtained by using the Fourier transform for a given earthquake accelerogram are also shown. The possibility of using simplified models to represent the bottom sediment effects is discussed in the paper. Two alternative models for porous sediment are tested. Simplified models are shown to be able to reproduce the effects of porous sediments except for very high permeability values. Copyright (C) 2004 John Wiley Sons, Ltd.
URI: http://hdl.handle.net/10553/49172
ISSN: 0098-8847
DOI: 10.1002/eqe.392
Fuente: Earthquake Engineering and Structural Dynamics[ISSN 0098-8847],v. 33, p. 1103-1123
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