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Application of pre-stressed SMA-based tuned mass damper to a timber floor system

Lookup NU author(s): Dr Haoyu HuangORCiD

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Abstract

© 2018Shape memory alloy (SMA) is becoming a popularly studied smart material in the field of structural control. The feasibility of utilising an SMA in a tuneable mass damper to reduce the excessive vibration of a timber floor system was revealed in a pilot study. However, the in-service excitations on a floor can be complex and involve more frequencies and randomness; therefore, this paper aims to assess the effectiveness of the SMA-based semi-active TMD in a real-scale timber floor, where the free vibration and human footfall-induced vibration are considered as inputs. This study is conducted using numerical simulations on OPENSEES. By reducing the floor vibration at a range of frequencies, both cooling and heating the SMA are effective in retuning the off-tuned TMD and reducing the structural response. Footfall excitation involves more than one excitation frequencies, and the higher dominant frequencies can resonate with the off-tuning frequencies, increasing the structural response. Simulation results demonstrate that retuning using SMAs can effectively lower the structural response at a wide range of frequencies, thus attenuating the footfall-induced vibration.

Publication metadata

Author(s): Huang H, Chang W-S

Publication type: Article

Publication status: Published

Journal: Engineering Structures

Year: 2018

Volume: 167

Pages: 143-150

Print publication date: 15/07/2018

Online publication date: 12/05/2018

Acceptance date: 04/04/2018

ISSN (print): 0141-0296

ISSN (electronic): 1873-7323

Publisher: Elsevier Ltd

URL: https://doi.org/10.1016/j.engstruct.2018.04.011

DOI: 10.1016/j.engstruct.2018.04.011

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