Examinando por Materia "Earthquake modeling"

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    Ítem
    Development of a global seismic risk model
    (EARTHQUAKE ENGINEERING RESEARCH INST, 2020-02-02) Vitor Silva; Desmond Amo-Oduro; Alejandro Calderon; Catarina Costa; Jamal Dabbeek; Venetia Despotaki; Luis Martins; Marco Pagani; Anirudh Rao; Michele Simionato; Daniele Viganò; Catalina Yepes-Estrada; Ana Acevedo; Helen Crowley; Nick Horspool; Kishor Jaiswal; Murray Journeay; Massimiliano Pittore; Mecánica Aplicada
    Since 2015, the Global Earthquake Model (GEM) Foundation and its partners have been supporting regional programs and bilateral collaborations to develop an open global earthquake risk model. These efforts led to the development of a repository of probabilistic seismic hazard models, a global exposure dataset comprising structural and occupancy information regarding the residential, commercial and industrial buildings, and a comprehensive set of fragility and vulnerability functions for the most common building classes. These components were used to estimate probabilistic earthquake risk globally using the OpenQuake-engine, an open-source software for seismic hazard and risk analysis. This model allows estimating a number of risk metrics such as annualized average losses or aggregated losses for particular return periods, which are fundamental to the development and implementation of earthquake risk mitigation measures. © The Author(s) 2020.
  • No hay miniatura disponible
    Ítem
    Development of a global seismic risk model
    (EARTHQUAKE ENGINEERING RESEARCH INST, 2020-02-02) Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Acevedo, A.; EUCENTRE; GNS Science; US Geological Survey; Natural Resources of Canada; GFZ Potsdam; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Global Earthquake Model Foundation; Acevedo, A.; EUCENTRE; GNS Science; US Geological Survey; Natural Resources of Canada; GFZ Potsdam; Universidad EAFIT. Departamento de Ingeniería de Producción; Materiales de Ingeniería
    Since 2015, the Global Earthquake Model (GEM) Foundation and its partners have been supporting regional programs and bilateral collaborations to develop an open global earthquake risk model. These efforts led to the development of a repository of probabilistic seismic hazard models, a global exposure dataset comprising structural and occupancy information regarding the residential, commercial and industrial buildings, and a comprehensive set of fragility and vulnerability functions for the most common building classes. These components were used to estimate probabilistic earthquake risk globally using the OpenQuake-engine, an open-source software for seismic hazard and risk analysis. This model allows estimating a number of risk metrics such as annualized average losses or aggregated losses for particular return periods, which are fundamental to the development and implementation of earthquake risk mitigation measures. © The Author(s) 2020.
  • No hay miniatura disponible
    Ítem
    Virtual topography: A fictitious domain approach for analyzing free-surface irregularities in large-scale earthquake ground motion simulation
    (WILEY-BLACKWELL, 2014-11-16) Restrepo, Doriam; Bielak, Jacobo; Mecánica Aplicada
    This paper presents a numerical scheme based on a fictitious domain framework for the numerical modeling of earthquake-induced ground motion in the presence of realistic surface topography of the Earth's crust. We show that by adopting a non-conforming octree-based meshing approach associated with a virtual representation of the surficial irregularity, we can obtain accurate representations of ground motion. From the computational point of view, our methodology proves to be also efficient, and more importantly, it allows us to preserve the salient features of multi-resolution cubic-shaped finite elements for wave propagation applications. We implemented the non-conforming meshing scheme for the treatment of realistic topographies into Hercules, the octree-based finite-element earthquake simulator developed by the Quake Group at Carnegie Mellon University. We tested the benefits of the strategy by benchmarking its results against reference examples, and by means of numerical error estimate analyses. Our qualitative and quantitative comparisons showed a close agreement between our numerical results and the reference results, and also, that the order of convergence of the displacement field is preserved in the presence of surface topography. Moreover, this performance was obtained by using the same mesh refinement techniques with cubic elements as in traditional flat free-surface simulations. © 2014 John Wiley & Sons, Ltd.