Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Seismic Hazard and Ground Motion Characterization at the Itoiz Dam (Northern Spain)
Year:2011
Research Areas
  • Natural sciences and health sciences,
  • Engineering,
  • Civil engineering and architecture
Information
Abstract
This paper presents a new hazard-consistent ground motion characterization of the Itoiz dam site, located in Northern Spain. Firstly, we propose a methodology with different approximation levels to the expected ground motion at the dam site. Secondly, we apply this methodology taking into account the particular characteristics of the site and of the dam. Hazard calculations were performed following the Probabilistic Seismic Hazard Assessment method using a logic tree, which accounts for different seismic source zonings and different ground-motion attenuation relationships. The study was done in terms of peak ground acceleration and several spectral accelerations of periods coinciding with the fundamental vibration periods of the dam. In order to estimate these ground motions we consider two different dam conditions: when the dam is empty (T = 0.1 s) and when it is filled with water to its maximum capacity (T = 0.22 s). Additionally, seismic hazard analysis is done for two return periods: 975 years, related to the project earthquake, and 4,975 years, identified with an extreme event. Soil conditions were also taken into account at the site of the dam. Through the proposed methodology we deal with different forms of characterizing ground motion at the study site. In a first step, we obtain the uniform hazard response spectra for the two return periods. In a second step, a disaggregation analysis is done in order to obtain the controlling earthquakes that can affect the dam. Subsequently, we characterize the ground motion at the dam site in terms of specific response spectra for target motions defined by the expected values SA (T) of T = 0.1 and 0.22 s for the return periods of 975 and 4,975 years, respectively. Finally, synthetic acceleration time histories for earthquake events matching the controlling parameters are generated using the discrete wave-number method and subsequently analyzed. Because of the short relative distances between the controlling earthquakes and the dam site we considered finite sources in these computations. We conclude that directivity effects should be taken into account as an important variable in this kind of studies for ground motion characteristics.
International
Si
JCR
Si
Title
Pure and Applied Geophysics
ISBN
1420-9136
Impact factor JCR
0
Impact info
Volume
Onli First
10.1007/s00024-011-0405-0
Journal number
From page
To page
Month
SIN MES
Ranking
Participants
  • Autor: Alicia Rivas Medina (UPM)
  • Autor: Miguel Angel Santoyo (Universidad Complutense de Madrid)
  • Autor: Francisco Luzón (Universidad de Almer¿¿a)
  • Autor: Maria Belen Benito Oterino (UPM)
  • Autor: Jorge Miguel Gaspar Escribano (UPM)
  • Autor: Antonio Garcia-Jerez (Universidad de Almería)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Ingeniería Topográfica y Cartografía
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)