Estimation of Empirical Response Spectrum and local responses of the Justicia Espada Acuña Mena building using the Mod-ζ(var) method for the 2010 central Chilean mega-earthquake (Mw=8.8)

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dc.coverageDOI: 10.1016/j.jobe.2024.109599
dc.creatorArellano, Benjamín
dc.creatorHernández, Francisco
dc.creatorMassone, Leonardo M.
dc.creatorAstroza, Rodrigo
dc.creatorSoto, Pedro
dc.creatorContreras, Nicolás
dc.creatorGarrido, Bastián
dc.date2024
dc.date.accessioned2025-11-18T19:49:57Z
dc.date.available2025-11-18T19:49:57Z
dc.description<p>A novel system identification technique called Mod-ζ (var) is formulated, implemented, and validated to study the seismic response of a 3D R/C shear wall building during the 2010 central Chilean mega-earthquake (Mw = 8.8). The Mod-ζ(var) approach is an evolution of Least-Square modal system identification techniques, where modal parameters are adjusted through small data windows to fit seismic data in the frequency and time domains. This technique offers several advantages over traditional methods, including the estimation of time-variant dynamic properties during seismic events and the reliable assessment of continuous nonlinear modal responses. As a result, the Mod-ζ(var) approach allows for determining empirical response spectra related to each seismic input. The technique can also compute the local response of measured and unmeasured floors as the product between the nonlinear modal responses (obtained from the Mod-ζ(var) approach) and the normalized seismic mode shapes for all building floors, which can be estimated from ambient vibration data. Finally, the seismic floor deformations can be imposed on a FEM to determine relevant engineering quantities such as inter-story drift, inter-story forces, and local demand of structural elements (e.g., drift ratios, curvatures, internal forces, stresses, strains, etc.).</p>eng
dc.identifierhttps://investigadores.uandes.cl/en/publications/38c006e3-502f-44a0-a6d5-74dfe34b3d7d
dc.identifier.urihttps://repositorio.uandes.cl/handle/uandes/56358
dc.languageeng
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.sourcevol.92 (2024) date: 2024-09-01
dc.subjectEmpirical Response Spectrum
dc.subjectLocal/global seismic response
dc.subjectMod-ζ (var) approach
dc.subjectTime-variant dynamic properties
dc.subjectUnmeasured floor responses
dc.titleEstimation of Empirical Response Spectrum and local responses of the Justicia Espada Acuña Mena building using the Mod-ζ(var) method for the 2010 central Chilean mega-earthquake (Mw=8.8)eng
dc.typeArticleeng
dc.typeArtículospa
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