A experimental study of a cable-pulleys spring-damper energy dissipation system for buildings

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dc.coverageDOI: 10.1016/j.jobe.2022.104034
dc.creatorHernández, Francisco
dc.creatorAstroza, Rodrigo
dc.creatorBeltrán, Juan Felipe
dc.creatorZhang, Xihong
dc.creatorMercado, Vicente
dc.date2022
dc.date.accessioned2025-11-18T19:48:28Z
dc.date.available2025-11-18T19:48:28Z
dc.description<p>An energy dissipation mechanism made of a cable-pulleys system placed in series with a spring-damper device (fluid viscous) is experimentally studied. The system aims to provide high damping ratios for all the structural modes by using a unique spring-damper device to dissipate the seismic energy of the entire structure (and all its structural modes). Shake table tests and pull-back tests are carried out on a scaled five-story structure to compare the dissipation capabilities provided by the proposed system. Therefore, the same structure is tested under different configurations that included: i) the structure itself without any energy mitigation device, ii) the structure with viscous dampers installed on each story, iii) the structure with the proposed cable-pulleys and the spring-damper system, and iv) the structure with the cable-pulleys system but without any dissipation device. The experimental results showed that the structure with the proposed system exhibits a highly nonlinear response (mainly explained by the cable-pulleys interaction) evidenced by the significant change of the structure's dynamic properties during the time. The Short-Time Transfer Function plots show that the structure's natural frequencies change significantly when the cable-pulleys system is included. Complementarily, a novel time-variant system identification approach, termed Mod-ζ(var), is proposed, which allows estimating the time-variant evolution of the structure's dynamic properties during seismic tests (natural frequencies, damping ratios, and mode shapes). Moreover, the Mod-ζ(var) approach also enables computing relevant engineering quantities such as the empirical response spectrum from experimental data. It is found that the analyzed energy dissipation system provides high damping ratios (&gt;10%) for all the structural modes, allowing reducing the seismic demands in terms of the empirical response spectrum, inter-story drifts, inter-story shear forces, peak accelerations, and Housner Intensities at each floor.</p>eng
dc.identifierhttps://investigadores.uandes.cl/en/publications/7a7b5574-dbe7-4f23-ada2-adc8f7f13836
dc.identifier.urihttps://repositorio.uandes.cl/handle/uandes/55582
dc.languageeng
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.sourcevol.51 (2022) date: 2022-07-01
dc.subjectCable-pulleys spring-damper system
dc.subjectEmpirical response spectrum
dc.subjectEnergy dissipation
dc.subjectMOD-Ζ(VAR) Approach
dc.subjectNormalized seismic modes
dc.subjectSystem identification
dc.subjectTime-variant modal parameters
dc.titleA experimental study of a cable-pulleys spring-damper energy dissipation system for buildingseng
dc.typeArticleeng
dc.typeArtículospa
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