Low-energy structures embedded with smart dampers

Ha, Q; Royel, S; Balaguer, C

Low-energy structures embedded with smart dampers

Ha, Q

Royel, S

Balaguer, C

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Publication Type:: Journal Article
Citation:: Energy and Buildings, 2018, 177 pp. 375 - 384
Issue Date:: 2018-10-15

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Field	Value	Language
dc.contributor.author	Ha, Q https://orcid.org/0000-0003-0978-1758	en_US
dc.contributor.author	Royel, S https://orcid.org/0000-0001-6262-5282	en_US
dc.contributor.author	Balaguer, C	en_US
dc.date.available	2020-10-16T18:01:54Z
dc.date.issued	2018-10-15	en_US
dc.identifier.citation	Energy and Buildings, 2018, 177 pp. 375 - 384	en_US
dc.identifier.issn	0378-7788	en_US
dc.identifier.uri	http://hdl.handle.net/10453/127810
dc.description.abstract	© 2018 Elsevier B.V. Building structures, subject to dynamic loadings or external disturbances, may undergo destructive vibrations and encounter different degrees of deformation. Modeling and control techniques can be applied to effectively damp out these vibrations and maintain structural health with a low energy cost. Smart structures embedded with semi-active control devices, offer a promising solution to the problem. The smart damping concept has been proven to be an effective approach for input energy shaping and suppressing unwanted vibrations in structural control for buildings embedded with magnetorheological fluid dampers (MRDs). In this paper, the dissipation energy in MRD is studied by using results from induced hysteretic effect of structural vibrations while the fluid is placed under a controlled magnetic field. Then, a frequency-shaped second-order sliding mode controller (FS2SMC) is designed along with a low-pass filter to implement the desired dynamic sliding surface, wherein the frequency responses of the hysteretic MRD is represented by its magnitude and phase describing functions. The proposed controller can thus shape the frequency characteristics of the equivalent dynamics for the MRD-embedded structure against induced vibrations, and hence, dissipate the energy flow within the smart devices to prevent structural damage. Simulation results for a 10-floor building model equipped with current-controlled MRDs, subject to horizontal seismic excitations validate the proposed technique for low-energy structures with smart devices. The closed-loop performance and comparison in terms of energy signals indicate that the proposed method allows not only to reduce induced vibrations and input energy, but also its spectrum can be adjusted to prevent natural modes of the structure under external excitations.	en_US
dc.relation.ispartof	Energy and Buildings	en_US
dc.relation.isbasedon	10.1016/j.enbuild.2018.08.016	en_US
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	Building & Construction	en_US
dc.title	Low-energy structures embedded with smart dampers	en_US
dc.type	Journal Article
utslib.citation.volume	177	en_US
utslib.for	0905 Civil Engineering	en_US
utslib.for	0913 Mechanical Engineering	en_US
utslib.for	09 Engineering	en_US
utslib.for	12 Built Environment and Design	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	open_access	*
pubs.publication-status	Published	en_US
pubs.volume	177	en_US

Abstract:

© 2018 Elsevier B.V. Building structures, subject to dynamic loadings or external disturbances, may undergo destructive vibrations and encounter different degrees of deformation. Modeling and control techniques can be applied to effectively damp out these vibrations and maintain structural health with a low energy cost. Smart structures embedded with semi-active control devices, offer a promising solution to the problem. The smart damping concept has been proven to be an effective approach for input energy shaping and suppressing unwanted vibrations in structural control for buildings embedded with magnetorheological fluid dampers (MRDs). In this paper, the dissipation energy in MRD is studied by using results from induced hysteretic effect of structural vibrations while the fluid is placed under a controlled magnetic field. Then, a frequency-shaped second-order sliding mode controller (FS2SMC) is designed along with a low-pass filter to implement the desired dynamic sliding surface, wherein the frequency responses of the hysteretic MRD is represented by its magnitude and phase describing functions. The proposed controller can thus shape the frequency characteristics of the equivalent dynamics for the MRD-embedded structure against induced vibrations, and hence, dissipate the energy flow within the smart devices to prevent structural damage. Simulation results for a 10-floor building model equipped with current-controlled MRDs, subject to horizontal seismic excitations validate the proposed technique for low-energy structures with smart devices. The closed-loop performance and comparison in terms of energy signals indicate that the proposed method allows not only to reduce induced vibrations and input energy, but also its spectrum can be adjusted to prevent natural modes of the structure under external excitations.

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http://hdl.handle.net/10453/127810