Earthquakes and Structures

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Seismic control performance and experimental study of multiple pounding tuned rolling mass damper

  • Peiran Fan (School of Civil Engineering and Architecture, Wuhan University of Technology) ;
  • Shujin Li (School of Civil Engineering and Architecture, Wuhan University of Technology) ;
  • Ling Mao (School of Civil Engineering and Architecture, Wuhan University of Technology)
  • Received : 2022.05.08
  • Accepted : 2023.03.08
  • Published : 2023.04.25
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Abstract

Multiple pounding tuned rolling mass damper (MPTRMD) distributed in the cavity of voided slabs is proposed to passively control multi-story frame structures, which disperses the mass of the oscillator to multiple dampers so that the control device can be miniaturized without affecting the vibration control performance. The mechanism and the differential motion equations of the MPTRMD-controlled multi-degree-of-freedom system are derived based on the Lagrange principle. Afterward, this advanced RMD is applied to a simplified 20-floor steel frame to evaluate the seismic control performance in the numerical analysis. A four-storey frame structure equipped with MPTRMD is then taken for a shaking table test to verify its effectiveness of control performance. The pounding mechanism has been detailed studied numerically and experimentally as well. The numerical and experimental results show that the proposed damper is practically promising not only for its prominent control performance but also for its lightweight and space-saving. Additionally, the pounding mechanism influenced by the variable impact parameters exhibits a balance between the two effects of motional limitations and energy dissipation.

Keywords

Acknowledgement

The authors would like to acknowledge the support provided by National Natural Science Foundation of China (NSFC, contract number: 51678464), and Hubei Key Laboratory of Roadway Bridge and Structure Engineering (Wuhan University of Technology) (No. DQJJ201901).

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