Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16704
Title: Modelling of a self-centring damper and its application in structural control
Authors: Ma, H
Yam, MCH 
Keywords: Self-centring
Simulink
SMA damper
Structural control
The BoucWen model
Issue Date: 2011
Publisher: Elsevier
Source: Journal of constructional steel research, 2011, v. 67, no. 4, p. 656-666 How to cite?
Journal: Journal of constructional steel research 
Abstract: A self-centring SMA damper which shows no residual deformation and moderate energy dissipating capacity is appealing in its potential for seismic design application. The damper examined in this study consists of a re-centring components group and an energy dissipating components group. By using the BoucWen model to describe the energy dissipating group and rigid-elastic model to represent the re-centring group, a new method for the mathematical modelling of the damper has been developed. To validate the feasibility of the proposed SMA damper model, numerical analyses of the damper under sine wave excitations were conducted by programming in the Matlab/Simulink environment. The simulation results of the proposed mathematical model of the SMA damper compare well with those based on a material constitutive model. Furthermore, the SMA damper was applied to two case studies of steel frames under earthquake acceleration excitations and the corresponding time-history analyses were implemented in Matlab/Simulink environment by using the proposed damper model. The results show that the damper is capable of mitigating both floor displacement amplitude and inter-storey drift. For the first floor of the controlled frames in the two case studies, inter-storey drift reductions of 33% and 35%, respectively, were observed in comparison with those of the uncontrolled frames. The results also indicate that the controlled frames vibrate around their initial position, and that there is no residual deformation of the SMA damper.
URI: http://hdl.handle.net/10397/16704
ISSN: 0143-974X
EISSN: 1873-5983
DOI: 10.1016/j.jcsr.2010.11.014
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