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ORIGINAL RESEARCH article

Front. Built Environ.
Sec. Earthquake Engineering
Volume 10 - 2024 | doi: 10.3389/fbuil.2024.1508190

Device topology optimization for an inerter-based structural dynamic vibration absorber

Provisionally accepted
Ruihong Xie Ruihong Xie 1Kohju Ikago Kohju Ikago 2*
  • 1 School of Engineering, Tohoku University, Sendai, Miyagi, Japan
  • 2 International Research Institute of Disaster Science, Tohoku University, Sendai, Japan

The final, formatted version of the article will be published soon.

    The tuned viscous mass damper (TVMD) and tuned inerter damper (TID) have been proposed as devices that achieve weight reduction by replacing the mass element of a structural dynamic vibration absorber (DVA) with an inerter. In the TID, the damping element is arranged in parallel with the spring, making its device topology the same as conventional dynamic vibration absorbers.In contrast, in the TVMD, the damping element is arranged in parallel with the inerter. This parallel mechanism of the inerter and damping element can be realized in a single device, and the member of the building to support the device can be used as the spring element, which makes the TVMD highly practical. In fact, TVMDs with a mass effect equivalent to thousands of tons have been commercialized and applied to high-rise buildings in Japan. This paper aims to clarify the effects of the choice of objective functions and damping element arrangement on the seismic response control effectiveness of inerter-based structural DVAs, providing guidelines for structural engineers in selecting suitable devices to achieve desired control effects. The method of investigation considers a model that encompasses both TVMD and TID configurations, and formulates a multi-objective optimization problem to simultaneously minimize the displacement amplification factor and floor response acceleration amplification factor. The results of the multi-objective optimization revealed that the TVMD is optimal when the focus is on controlling displacement response, while the TID is optimal when prioritizing the control of floor response acceleration. It was found that the floor response acceleration amplification factor of a structure containing TVMD could be significantly improved by slightly compromising the displacement response amplification factor, leading to the recommendation of adopting the TVMD configuration as an inerter-based structural DVA.

    Keywords: Inerter, Tuned viscous mass damper, Tuned inerter damper, Tuned mass damper, multi-objective optimization, Pareto front

    Received: 09 Oct 2024; Accepted: 26 Nov 2024.

    Copyright: © 2024 Xie and Ikago. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Kohju Ikago, International Research Institute of Disaster Science, Tohoku University, Sendai, Japan

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