A noniterative design procedure for supplemental brace-damper systems in single-degree-of-freedom systems

SUMMARY In this paper, a method for designing supplemental brace–damper systems in single‐degree‐of‐freedom (SDOF) structures is presented. We include the effects of the supporting brace stiffness in the dynamic response by using a viscoelastic Maxwell model. On the basis of the study of an SDOF und...

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Bibliographic Details
Published in:Earthquake engineering & structural dynamics 2013-12, Vol.42 (15), p.2361-2367
Main Authors: Londoño, Julián M., Neild, Simon A., Wagg, David J.
Format: Article
Language:English
Subjects:
brace-damper systems
damper sizing
Dampers
Design engineering
Dynamic response
Dynamical systems
Dynamics
Earth sciences
Earth, ocean, space
Earthquake engineering
Earthquakes, seismology
Engineering and environment geology. Geothermics
Engineering geology
Exact sciences and technology
Grounds
Internal geophysics
Maxwell model
Optimization
supplemental damping
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Summary:SUMMARY In this paper, a method for designing supplemental brace–damper systems in single‐degree‐of‐freedom (SDOF) structures is presented. We include the effects of the supporting brace stiffness in the dynamic response by using a viscoelastic Maxwell model. On the basis of the study of an SDOF under ground excitation, we propose a noniterative design procedure for simultaneously specifying both the damper and the brace while assuring a desired structural performance. It is shown that to increase the damper size beyond the value delivered by the proposed criteria will not provide any improvement but actually worsen the structural response. The design method presented here shows excellent agreement with the FEMA 273 design approach but offers solutions closer to optimality. Copyright © 2013 John Wiley & Sons, Ltd.
ISSN:0098-8847
1096-9845
DOI:10.1002/eqe.2339