Walter J. Silva

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Disclaimer The opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the study sponsor(s) ii iii ABSTRACT This report serves as a documentation of the ground motion database development for the NGA-East Project. The ground motion database includes the(More)
A typical engineering approach to developing site-specific design vertical ground motions starts with rock-outcrop horizontal motions, converts them into the vertical component using an empirical vertical-to-horizontal (V/H) ratio for response spectra, and propagates the resulting motion through the soil column as a vertically incident P wave. In the(More)
Disclaimer The opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the study sponsor(s) ii iii ABSTRACT The nonlinear soil amplification models developed by Walling et al. (2008) are revisited for two main reasons: (a) the simulation database on which the(More)
Disclaimer The opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the study sponsor(s) ii iii ABSTRACT This report presents the results of a comprehensive literature search and limited additional studies that support the recommendation of a probability(More)
Disclaimer The opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the study sponsor(s) ii iii ABSTRACT This report summarizes the products and results of a study on the collection, processing, and analysis of earthquake ground-motions recorded in Arizona(More)
The incorporation of semi-supervision in the cluster detection process has proved especially useful when one wants to get a high consistency between the data partitioning and the knowledge the user has about the data domain. In recent years, several strategies for semi-supervised clustering have been proposed. The approaches adopted by these strategies aim(More)
  • Timothy D. Ancheta, Robert B. Darragh, +9 authors Jennifer L. Donahue
  • 2013
Disclaimer The opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the study sponsor(s) ii iii ABSTRACT The NGA-West2 project database expands on the current PEER NGA ground-motion database to include worldwide ground-motion data recorded from shallow(More)
  • Sanaz Rezaeian, Yousef Bozorgnia, Norman Abrahamson, Walter Silva
  • 2012
Disclaimer The opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the study sponsor(s) ABSTRACT Ground motion prediction equations (GMPEs) for elastic response spectra, including the Next Generation Attenuation (NGA) models, are typically developed at a(More)
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