Evaluation of the intensity measure approach in performance-based earthquake engineering with simulated ground motions
Por:
Quiroz-Ramírez A., Arroyo D., Terán-Gilmore A., Ordaz M.
Publicada:
1 abr 2014
Resumen:
Within the framework of performance-based earthquake engineering, the intensity-measure approach (IMA) has become the standard option for the characterization of engineering-demand parameters (EDPs) for systems undergoing significant inelastic behavior. Within this approach, the rates of exceedance of the EDPs are computed from a hazard curve corresponding to an intensity measure (IM; usually the spectral acceleration at the first mode period SA(T1) and the conditional probability density function (CPDF) of the EDP given the IM. In view of the lack of strong ground motion records associated with large values of currently used IMs, the parameters required to establish a CPDF are obtained from an incremental dynamic analysis that considers the SA(T1) linear scaling of motions recorded during seismic events of moderate intensity. However, from a seismological perspective, the linearly scaling method is too simple and may lead to unrealistic ground-motion records that may affect the accuracy of the IMA. The dynamic response of single-degree-of-freedom systems subjected to simulated ground motions is analyzed in order to assess the limitations of the SA(T1) linearly scaling method. These simulated ground motions were obtained via a stochastic simulation technique that has a solid seismological basis. The results presented herein are useful to numerically understand the limitations of the SA(T1) linearly scaling method and to identify situations in which a more sophisticated analysis is warranted.
Filiaciones:
Quiroz-Ramírez A.:
Posgrad Univ Nacl Autonoma Mexico UNAM, Programa Maestria & Doctorado Ingn, Mexico City 04510, DF, Mexico
Posgrado Universidad Nacional Autónoma de México (UNAM), Av. Universidad No.3000, CP 04510 Mexico, Mexico
Arroyo D.:
Departamento de Materiales, Universidad Autónoma Metropolitana-Azcapotzalco, Av. San Pablo No.180, CP 02200 Mexico, DF, Mexico
Terán-Gilmore A.:
Departamento de Materiales, Universidad Autónoma Metropolitana-Azcapotzalco, Av. San Pablo No.180, CP 02200 Mexico, DF, Mexico
Ordaz M.:
Univ Nacl Autonoma Mexico, Inst Ingn, Coordinac Ingn Sismol, Mexico City 04510, DF, Mexico
Coordinación de Ingeniería Sismológica, Instituto de Ingeniería Universidad Nacional Autónoma de México (UNAM), Av. Universidad No.3000, CP 04510 Mexico, DF, Mexico
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