Evaluation of bias on the probability of collapse from amplitude scaling using spectral-shape-matched records

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dc.contributor.author Dávalos Alejo, Héctor
dc.contributor.other Campus Guadalajara
dc.date.accessioned 2019-07-02T18:30:49Z
dc.date.available 2019-07-02T18:30:49Z
dc.date.issued 2019
dc.identifier.citation Dávalos, H., & Miranda, E. (2019). Evaluation of bias on the probability of collapse from amplitude scaling using spectral-shape-matched records. Earthquake Engineering and Structural Dynamics, 48(8), 970-986. doi:10.1002/eqe.3172 es_ES, en_US
dc.identifier.issn 0098-8847
dc.identifier.other Campus Guadalajara es_ES, en_US
dc.identifier.uri http://scripta.up.edu.mx/xmlui/handle/123456789/4919
dc.description.abstract Although for many years it was thought that amplitude scaling of acceleration time series to reach a target intensity did not introduce any bias in the results of nonlinear response history analyses, recent studies have showed that scaling can lead to an overestimation of deformation demands with increasing scale factors. Some studies have suggested that the bias can be explained by differences in spectral shape between the response spectra of unscaled and scaled records. On the basis of these studies, some record selection procedures assume that if records are selected using spectral-shape-matching procedures, amplitude scaling does not induce any bias on the structural response. This study evaluates if bias is introduced on lateral displacement demands and seismic collapse risk estimates even when spectral shape is carefully taken into consideration when selecting ground motions. Several single-degree-of-freedom and multiple-degree-of-freedom systems are analyzed when subjected to unscaled and scaled ground motions selected to approximately match the mean and the variance of the conditional spectrum at the target level of intensity. Results show that an explicit consideration of spectral shape is not enough to avoid a systematic overestimation of lateral displacement demands and collapse probabilities as the scale factor increases. Moreover, the bias is observed in practically all cases for systems with strength degradation and it increases with decreasing period and decreasing lateral strength relative to the strength required to remain elastic. Key reasons behind the bias are presented by evaluating input energy, causal parameters, and damaging pulse distributions in unscaled and scaled ground motion sets.
dc.language.iso eng
dc.publisher Wiley es_ES, en_US
dc.relation Versión aceptada es_ES, en_US
dc.relation.ispartof REPOSITORIO SCRIPTA es_ES, en_US
dc.relation.ispartof OPENAIRE es_ES, en_US
dc.rights Acceso Cerrado es_ES, en_US
dc.rights.uri http://creativecommons.org/licenses/by-nd/4.0 es_ES, en_US
dc.source Earthquake Engineering and Structural Dynamics
dc.subject Earthquake effects es_ES, en_US
dc.subject Time series analysis es_ES, en_US
dc.subject Acceleration time series es_ES, en_US
dc.subject Amplitude scaling es_ES, en_US
dc.subject Ground motion selections es_ES, en_US
dc.subject Multiple degree-of-freedom systems es_ES, en_US
dc.subject Nonlinear response history analysis es_ES, en_US
dc.subject Scaling factors es_ES, en_US
dc.subject Single degree of freedoms es_ES, en_US
dc.subject Spectral shapes es_ES, en_US
dc.subject Degrees of freedom (mechanics) es_ES, en_US
dc.subject.classification INGENIERIA Y TECNOLOGIA es_ES, en_US
dc.subject.classification Ingeniería
dc.title Evaluation of bias on the probability of collapse from amplitude scaling using spectral-shape-matched records es_ES, en_US
dc.type artículo es_ES, en_US
dcterms.audience Investigadores
dcterms.audience Estudiantes
dcterms.audience Maestros

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