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dc.contributor.authorHernandez, Francisco
dc.contributor.authorAstroza, Rodrigo
dc.contributor.authorBeltran, Juan Felipe
dc.contributor.authorZhang, Xihong
dc.contributor.authorMercado, Vicente
dc.identifier.citationHernandez, F. and Astroza, R. and Beltran, J.F. and Zhang, X. and Mercado, V. 2022. A experimental study of a cable-pulleys spring-damper energy dissipation system for buildings. Journal of Building Engineering. 51: ARTN 104034.

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 (>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.

dc.subjectScience & Technology
dc.subjectConstruction & Building Technology
dc.subjectEngineering, Civil
dc.subjectEnergy dissipation
dc.subjectCable-pulleys spring-damper system
dc.subjectSystem identification
dc.subjectTime-variant modal parameters
dc.subjectNormalized seismic modes
dc.subjectEmpirical response spectrum
dc.subjectMOD-?(VAR) Approach
dc.titleA experimental study of a cable-pulleys spring-damper energy dissipation system for buildings
dc.typeJournal Article
dcterms.source.titleJournal of Building Engineering
curtin.departmentSchool of Civil and Mechanical Engineering
curtin.accessStatusFulltext not available
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidZhang, Xihong [0000-0002-8667-4692]
curtin.identifier.article-numberARTN 104034
curtin.contributor.scopusauthoridZhang, Xihong [53065126400]

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