Generalized Damped Outrigger Systems for Suppressing Multimode Vibrations of Tall Buildings

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dc.citation.articleNumber2450034en_US
dc.citation.issueNumber4en_US
dc.citation.journalTitleInternational Journal of Structural Stability and Dynamicsen_US
dc.citation.volumeNumber24en_US
dc.contributor.authorWen, Yongkuien_US
dc.contributor.authorChen, Linen_US
dc.contributor.authorNagarajaiah, Satishen_US
dc.date.accessioned2024-07-25T20:56:28Zen_US
dc.date.available2024-07-25T20:56:28Zen_US
dc.date.issued2024en_US
dc.description.abstractDamped outrigger is a viable means for reducing dynamic responses of tall buildings. This study focuses on generalized damped outrigger (GDO) systems. A GDO is composed of a damper for energy dissipation, a negative stiffness device and an inerter for damping enhancement. The GDO system incorporates GDOs at different floors of the tall building optimized to varied structural modes. Frequency equation of a tall building simplified as a cantilever beam with multiple GDOs is first derived by complex modal analysis. A finite different model of such a system is used for verification. Parametric analyses are then performed to compare damping effects of different GDO systems. It is found that a negative stiffness damped outrigger (NSDO) or inerter damped outrigger (IDO) needs to be optimized for maximizing damping of a specific mode. GDOs, respectively, tuned to different modes can largely improve the multimode damping effects. The optimal parameters of the GDOs are slightly different from those in the case when they are installed separately. With both negative stiffness and nonzero inertance, a GDO still needs to be tuned to a specific mode because multimode damping is sensitive to the damper coefficient. The combination of an NSDO optimized to the first mode and an IDO tuned to a higher mode seems the best solution. The IDO additionally improves the first mode damping provided by the NSDO and the two-mode damping is not sensitive to the damper coefficient of the NSDO. The findings are confirmed through seismic response analyses of a tall building with different GDO systems.en_US
dc.identifier.citationWen, Y., Chen, L., & Nagarajaiah, S. (2024). Generalized Damped Outrigger Systems for Suppressing Multimode Vibrations of Tall Buildings. International Journal of Structural Stability and Dynamics, 24(04), 2450034. https://doi.org/10.1142/S0219455424500342en_US
dc.identifier.digitalwen-et-al-2023-generalized-damped-outrigger-systemsen_US
dc.identifier.doihttps://doi.org/10.1142/S0219455424500342en_US
dc.identifier.urihttps://hdl.handle.net/1911/117546en_US
dc.language.isoengen_US
dc.publisherWorld Scientificen_US
dc.rightsExcept where otherwise noted, this work is licensed under a Creative Commons Attribution-NonCommercial (CC BY-NC) license.  Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/en_US
dc.titleGeneralized Damped Outrigger Systems for Suppressing Multimode Vibrations of Tall Buildingsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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