| Titre : | Nonlinear stochastic dynamic analysis for performance-based earthquake engineering |
| Auteurs : | Der Kiureghian, Armen, Auteur ; Takita, Kazuya, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Earthquake engineering structural dynamics (Vol. 38 N°5, Avril 2009) |
| Article en page(s) : | pp. 719-738 |
| Note générale : | Génie Civil |
| Langues : | Anglais |
| Index. décimale : | 624.1 (Infrastructures.Ouvrages en terre. Fondations. Tunnels) |
| Tags : | Equivalent linearization ; Fragility curve ; Nonlinear response • Seismic demand ; Stochastic dynamics ; Tail probability |
| Résumé : | A new approach for computing seismic fragility curves for nonlinear structures for use in performance-based earthquake engineering analysis is proposed. The approach makes use of a recently developed method for nonlinear stochastic dynamic analysis by tail-equivalent linearization. The ground motion is modeled as a discretized stochastic process with a set of parameters that characterizes its evolutionary intensity and frequency content. For each selected response (seismic demand) threshold, a linear system is defined that has the same tail probability as the nonlinear response in first-order approximation. Simple linear random vibration analysis with the tail-equivalent linear system then yields the fragility curve. The approach has the advantage of avoiding the selection and scaling of recorded accelerograms and repeated time-history analyses, which is the current practice for developing fragility curves. |
| ISSN : | 0098-8847 |
| En ligne : | http://www3.interscience.wiley.com/journal/122205256/abstract |
