Structural Engineering and Mechanics

  • 제80권2호
  • /
  • Pages.157-168
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  • 2021
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Performance of a gas-spring tuned mass damper under seismic excitation

  • Rong, Kunjie (Department of Disaster Mitigation for Structures, Tongji University) ;
  • Lu, Zheng (Department of Disaster Mitigation for Structures, Tongji University)
  • 투고 : 2021.05.17
  • 심사 : 2021.08.04
  • 발행 : 2021.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

A nonlinear gas-spring is integrated into the traditional tuned mass damper (TMD), leading to a novel gas-spring tuned mass damper (GSTMD) system, which can be used to mitigate the structural responses. To better couple the tuned mass damping system, a symmetrical combined gas-spring (SCGS) is presented based on a single gas-spring, and its mechanical properties are investigated through a case study. The design method of the gas-spring TMD is obtained, and its corresponding configuration parameters are calculated. The control performance and damping mechanism of the gas-spring TMD under the random excitation are studied by parameter analysis, and the reliability of the gas-spring TMD's control performance is also discussed. The results show that the gas-spring TMD has a two-stage damping mechanism, and its working stage can change flexibly with the excitation intensity. Furthermore, the gas-spring TMD has excellent "Reconciling Control Performance", which not only has a comparable control performance as the linear TMD, but also has significant advantages in working stroke, more importantly, the control performance and working stroke of the gas-spring TMD can reconcile with each other. Besides, the control performance of the proposed damper is insensitive to unpredictable seismic excitations, indicating that the gas-spring TMD has good reliability.

키워드

과제정보

Financial support from the National Natural Science Foundation of China (51922080) is highly appreciated. This work is also supported by Program of Shanghai Academic Research Leader (20XD1423900) and the Fundamental Research Funds for the Central Government Supported Universities (11080).

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