Dynamic vibration control of non-linear buildings using multiple tuned mass dampers

Hashim  Ataie; Taiki  Saito

doi:10.59400/be.v1i1.488

Dynamic vibration control of non-linear buildings using multiple tuned mass dampers

Hashim Ataie Graduate School of Engineering, Toyohashi University of Technology
Taiki Saito Department of Architecture and Civil Engineering, Toyohashi University of Technology

Ariticle ID: 488

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DOI: https://doi.org/10.59400/be.v1i1.488

Keywords: dynamic vibration control; multiple tuned mass dampers; non-linear building; control strategy; pushover capacity curve; modal effective mass

Abstract

In the field of civil engineering, tuned mass dampers (TMDs) serve as passive devices designed for dynamic vibration control of structures. When dealing with buildings exhibiting nonlinear behavior under dynamic loads, the effectiveness of TMDs may be affected by detuning due to the degradation of the building’s strength. Therefore, addressing the non-linear behavior requires a unique strategy involving the tuning of TMDs to specific time periods following the onset of non-linearity. The proposed approach in this study entails a pushover analysis to establish the pushover capacity curve. The regions between the origin and a target drift of 1/150 are then represented using an idealized trilinear form, with the initial segment corresponding to linearity and subsequent segments capturing non-linear behavior. The second segment spans from the onset of non-linearity to a target drift of 1/400, and the third segment covers the drift range from 1/400 to 1/150. Examining this strategy involves calculating time periods for each segment. Subsequently, three single TMD (STMD) scenarios and one multiple TMDs (MTMDs) scenario with 3 TMDs, each tuned to time periods corresponding specific segments of the idealized trilinear, are compared in this study. The evaluation includes non-linear dynamic analysis of 7-story and 25-story reinforced concrete buildings equipped with these TMD scenarios. The floors maximum displacement and peak acceleration results indicate that the STMDs tuned to the time periods corresponding to the non-linear segments exhibit robustness, surpassing the performance of the STMD tuned to the fundamental period. Remarkably, the MTMD scenario, demonstrates superior robustness compared to all three STMD scenarios. Further analysis under wind load on the same 25-story building confirms the effectiveness of the MTMDs and STMD tuned to the nonlinearity segment compared to the STMD tuned to the fundamental period. This research provides valuable insights into TMD design for enhanced building performance under non-linear conditions.

References

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Published

2023-12-30

How to Cite

Ataie, H., & Saito, T. (2023). Dynamic vibration control of non-linear buildings using multiple tuned mass dampers. Building Engineering, 1(1), 488. https://doi.org/10.59400/be.v1i1.488

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