The effect of spectral shape on damping modification factors

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dc.contributor.authorMiranda Camus, Sebastián
dc.contributor.authorMiranda, Eduardo
dc.contributor.authorLlera Martin, Juan Carlos de la
dc.date.accessioned2022-03-16T19:39:35Z
dc.date.available2022-03-16T19:39:35Z
dc.date.issued2020
dc.description.abstractThe main objective of this study is to investigate the effect of spectral shape on damping modification factors η used in equivalent static and response spectrum analyses of structures with damping ratios that are different from 5% critical damping. Record-to-record variability of η is also evaluated through a statistical analysis of 5270 ground motions records from 1137 interface earthquakes recorded in Chile. The effect of spectral shape is studied using recently developed spectral shape metrics SaRatio and epsilon (ε) and evaluating their use as possible predictors for η. Similarly to previous investigations, this article also examines the effect of oscillator period, earthquake magnitude, and earthquake duration for different levels of damping ratio. Results suggest that SaRatio is an effective predictor of η, particularly for highly damped structures. However, results also indicate that for rock and firm sites, earthquake faulting mechanism and site class do not have a significant influence on η. A simple period-independent regression model for η as a function of SaRatio and damping ratio is proposed. A comparison between median η from this study and those in current Chilean seismic codes shows that code factors are unconservative.
dc.fechaingreso.objetodigital2023-03-28
dc.format.extent26 páginas
dc.fuente.origenConveris
dc.identifier.citationMiranda S, Miranda E, Carlos de la Llera J. The effect of spectral shape on damping modification factors. Earthquake Spectra. 2020;36(4):2086-2111. doi:10.1177/8755293020936691
dc.identifier.doi10.1177/8755293020936691
dc.identifier.eissn1944-8201
dc.identifier.issn8755-2930
dc.identifier.scopusid2-s2.0-85087860045
dc.identifier.urihttps://doi.org/10.1177/8755293020936691
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/63425
dc.identifier.wosidWOS:000591902000021
dc.information.autorucEscuela de ingeniería ; Miranda Camus, Sebastián ; S/I ; 14064
dc.information.autorucEscuela de ingeniería ; Llera Martin, Juan Carlos de la ; 0000-0002-9064-0938 ; 53086
dc.issue.numero4
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final2111
dc.pagina.inicio2086
dc.revistaEarthquake Spectraes_ES
dc.rightsacceso restringido
dc.subject.ods11 Sustainable cities and communities
dc.subject.odspa11 Ciudades y comunidades sostenibles
dc.titleThe effect of spectral shape on damping modification factorses_ES
dc.typeartículo
dc.volumen36
sipa.codpersvinculados14064
sipa.codpersvinculados53086
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