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Structural Engineering and Mechanics
  Volume 74, Number 1, April10 2020, pages 129-143
DOI: http://dx.doi.org/10.12989/sem.2020.74.1.129
 


Seismic response control of transmission tower-line system using SMA-based TMD
Li Tian, Mengyao Zhou, Canxing Qiu, Haiyang Pan and Kunjie Rong

 
Abstract
    This study proposes a new shape memory alloy-tuned mass damper (SMA-TMD) and investigates the effectiveness of this damper in reducing and controlling the vibrations of a transmission tower-line system under various seismic excitations. Based on a practical transmission line system and considering the geometric nonlinearity of this system, the finite element (FE) software ANSYS is used to create an FE model of the transmission tower-line system and simulate the proposed SMA-TMD. Additionally, the parameters of the SMA springs are optimized. The effectiveness of a conventional TMD and the proposed SMA-TMD in reducing and controlling the vibrations of the transmission tower-line system under seismic excitations is investigated. Moreover, the effects of the ground motion intensity and frequency ratio on the reduction ratio (η) of the SMA-TMD are studied. The vibration reduction effect of the SMA-TMD under various seismic excitations is superior to that of the conventional TMD. Changes in the ground motion intensity and frequency ratio have a significant impact on the η of the SMA-TMD. As the ground motion intensity and frequency ratio increase, the η values of the SMA-TMD first increase and then decrease. Studying the vibration reduction effects of the SMA-TMD can provide a reference for the practical engineering application of this damper.
 
Key Words
    transmission tower-line system; shape memory alloy; tuned mass damper; vibration reduction and control; seismic excitation
 
Address
Li Tian, Mengyao Zhou, Canxing Qiu and Kunjie Rong: School of Civil Engineering, Shandong University, Jinan 250061, Shandong, China
Canxing Qiu: Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,
Beijing University of Technology, Beijing 100124, China
 

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