Enhanced seismic isolation system by using a yoke-type inerter
Li Zhang, Songtao Xue, Ruifu Zhang, Liyu Xie
Abstract. Previous studies have shown that inserting an inerter whose force-acceleration relationship is linear into the isolation layer of a base-isolated structure can effectively improve its seismic performance. A nonlinear strategy has the potential to provide a better control effect than its linear counterpart. This study proposed a yoke-type nonlinear inerter device by employing the Scotch yoke mechanism. The mechanical model of the proposed nonlinear inerter is built to illustrate the nonlinear inertial behavior using the Euler-Lagrange method. Then, The yoke-type inerter is incorporated into the isolation layer of a base-isolated structure to improve seismic performance. The relative displacement of isolation layer and responses of the superstructures are checked under different seismic events. The nonlinear inertial behavior of the yoke-type inerter is indicated by the proposed mechanical model. The relative displacement of the isolation layer and responses of the superstructures for the base-isolated structure with yoke-type inerter is smaller than that of the base-isolated structure with a linear inerter whose inertance is the same as the linearized yoke-type inerter, especially for the rare earthquake. It is said that the proposed yoke-type inerter can be seen as a candidate of the nonlinear inerter and can be used to improve the seismic performances of base-isolated structures.
Keywords
Yoke-Type Inerter, Nonlinear Inertia, Performance Improvement
Published online 3/25/2025, 7 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Li Zhang, Songtao Xue, Ruifu Zhang, Liyu Xie, Enhanced seismic isolation system by using a yoke-type inerter, Materials Research Proceedings, Vol. 50, pp 292-298, 2025
DOI: https://doi.org/10.21741/9781644903513-34
The article was published as article 34 of the book Structural Health Monitoring
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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