Post-quake decision analysis using dynamic programming / Gee Liek Yeo in Earthquake engineering structural dynamics, Vol. 38 N°1 (Janvier 2009)  

Public ISBD [article]  inEarthquake engineering structural dynamics > Vol. 38 N°1 (Janvier 2009) . - pp. 79-93 Titre : Post-quake decision analysis using dynamic programming Type de document : texte imprimé Auteurs : Gee Liek Yeo, Auteur ; Allin Cornell, C., Auteur Article en page(s) : pp. 79-93 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Post-quake  Aftershock  Decision analysis  Dynamic programming Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : We introduce a general decision analysis procedure based on stochastic dynamic programming in the post-quake aftershock environment. The damage sustained by the building due to the mainsheet, the time-varying aftershock rates and the potential for further damage progression in the post-quake environment are all factors taken into consideration in the proposed methodology. This procedure enables the optimal decision after the mainshock to be selected based on the minimization of expected financial losses, subject to a constraint on a minimal level of individual life-safety, using a consistent probabilistic framework to explicitly quantify the uncertainties in the variables. ISSN : 0098-8847 En ligne : http://www3.interscience.wiley.com/journal/121503004/abstract [article] Post-quake decision analysis using dynamic programming [texte imprimé] / Gee Liek Yeo, Auteur ; Allin Cornell, C., Auteur . - pp. 79-93. Génie Civil Langues : Anglais (eng) in Earthquake engineering structural dynamics > Vol. 38 N°1 (Janvier 2009) . - pp. 79-93 Mots-clés : Post-quake  Aftershock  Decision analysis  Dynamic programming Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : We introduce a general decision analysis procedure based on stochastic dynamic programming in the post-quake aftershock environment. The damage sustained by the building due to the mainsheet, the time-varying aftershock rates and the potential for further damage progression in the post-quake environment are all factors taken into consideration in the proposed methodology. This procedure enables the optimal decision after the mainshock to be selected based on the minimization of expected financial losses, subject to a constraint on a minimal level of individual life-safety, using a consistent probabilistic framework to explicitly quantify the uncertainties in the variables. ISSN : 0098-8847 En ligne : http://www3.interscience.wiley.com/journal/121503004/abstract

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A probabilistic framework for quantification of aftershock ground-motion hazard in California: Methodology and parametric study / Gee Liek Yeo in Earthquake engineering structural dynamics, Vol. 38 N°1 (Janvier 2009)  

Public ISBD [article]  inEarthquake engineering structural dynamics > Vol. 38 N°1 (Janvier 2009) . - pp. 45-60 Titre : A probabilistic framework for quantification of aftershock ground-motion hazard in California: Methodology and parametric study Type de document : texte imprimé Auteurs : Gee Liek Yeo, Auteur ; Allin Cornell, C., Auteur Article en page(s) : pp. 45-60 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Aftershock  Probabilistic seismic hazard analysis  Building tagging Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : This paper presents a proposed method of aftershock probabilistic seismic hazard analysis (APSHA) similar to conventional mainshock PSHA in that it estimates the likelihoods of ground motion intensity (in terms of peak ground accelerations, spectral accelerations or other ground motion intensity measures) due to aftershocks following a mainshock occurrence. This proposed methodology differs from the conventional mainshock PSHA in that mainshock occurrence rates remain constant for a conventional (homogeneous Poisson) earthquake occurrence model, whereas aftershock occurrence rates decrease with increased elapsed time from the initial occurrence of the mainshock. In addition, the aftershock ground motion hazard at a site depends on the magnitude and location of the causative mainshock, and the location of aftershocks is limited to an aftershock zone, which is also dependent on the location and magnitude of the initial mainshock. APSHA is useful for post-earthquake safety evaluation where there is a need to quantify the rates of occurrence of ground motions caused by aftershocks following the initial rupture. This knowledge will permit, for example, more informed decisions to be made for building tagging and entry of damaged buildings for rescue, repair or normal occupancy. ISSN : 0098-8847 En ligne : http://www3.interscience.wiley.com/journal/121378347/abstract [article] A probabilistic framework for quantification of aftershock ground-motion hazard in California: Methodology and parametric study [texte imprimé] / Gee Liek Yeo, Auteur ; Allin Cornell, C., Auteur . - pp. 45-60. Génie Civil Langues : Anglais (eng) in Earthquake engineering structural dynamics > Vol. 38 N°1 (Janvier 2009) . - pp. 45-60 Mots-clés : Aftershock  Probabilistic seismic hazard analysis  Building tagging Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : This paper presents a proposed method of aftershock probabilistic seismic hazard analysis (APSHA) similar to conventional mainshock PSHA in that it estimates the likelihoods of ground motion intensity (in terms of peak ground accelerations, spectral accelerations or other ground motion intensity measures) due to aftershocks following a mainshock occurrence. This proposed methodology differs from the conventional mainshock PSHA in that mainshock occurrence rates remain constant for a conventional (homogeneous Poisson) earthquake occurrence model, whereas aftershock occurrence rates decrease with increased elapsed time from the initial occurrence of the mainshock. In addition, the aftershock ground motion hazard at a site depends on the magnitude and location of the causative mainshock, and the location of aftershocks is limited to an aftershock zone, which is also dependent on the location and magnitude of the initial mainshock. APSHA is useful for post-earthquake safety evaluation where there is a need to quantify the rates of occurrence of ground motions caused by aftershocks following the initial rupture. This knowledge will permit, for example, more informed decisions to be made for building tagging and entry of damaged buildings for rescue, repair or normal occupancy. ISSN : 0098-8847 En ligne : http://www3.interscience.wiley.com/journal/121378347/abstract

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