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Viscoelastic coupling dampers (VCDs) for enhanced wind and seismic performance of high-rise buildings
Earthquake engineering & structural dynamics, 2013-12, Vol.42 (15), p.2217-2233
Christopoulos, Constantin
Montgomery, Michael
2013
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Christopoulos, Constantin
Montgomery, Michael
Titel
Viscoelastic coupling dampers (VCDs) for enhanced wind and seismic performance of high-rise buildings
Ist Teil von
Earthquake engineering & structural dynamics, 2013-12, Vol.42 (15), p.2217-2233
Ort / Verlag
Chichester: Blackwell Publishing Ltd
Erscheinungsjahr
2013
Quelle
Wiley Online Library
Beschreibungen/Notizen
SUMMARY As high‐rise buildings are built taller and more slender, their dynamic behavior becomes an increasingly critical design consideration. Wind‐induced vibrations cause an increase in the lateral wind design loads, but more importantly, they can be perceived by building occupants, creating levels of discomfort ranging from minor annoyance to severe motion sickness. The current techniques to address wind vibration perception include stiffening the lateral load‐resisting system, adding mass to the building, reducing the number of stories, or incorporating a vibration absorber at the top of the building; each solution has significant economic consequences for builders. Significant distributed damage is also expected in tall buildings under severe seismic loading, as a result of the ductile seismic design philosophy that is widely used for such structures. In this paper, the viscoelastic coupling damper (VCD) that was developed at the University of Toronto to increase the level of inherent damping of tall coupled shear wall buildings to control wind‐induced and earthquake‐induced dynamic vibrations is introduced. Damping is provided by incorporating VCDs in lieu of coupling beams in common structural configurations and therefore does not occupy any valuable architectural space, while mitigating building tenant vibration perception problems and reducing both the wind and earthquake responses of the structure. This paper provides an overview of this newly proposed system, its development, and its performance benefits as well as the overall seismic and wind design philosophy that it encompasses. Two tall building case studies incorporating VCDs are presented to demonstrate how the system results in more efficient designs. In the examples that are presented, the focus is on the wind and moderate earthquake responses that often govern the design of such tall slender structures while reference is made to other studies where the response of the system under severe seismic loading conditions is examined in more detail and where results from tests conducted on the viscoelastic material and the VCDs in full‐scale are presented. Copyright © 2013 John Wiley & Sons, Ltd.
Sprache
Englisch
Identifikatoren
ISSN: 0098-8847
eISSN: 1096-9845
DOI: 10.1002/eqe.2321
Titel-ID: cdi_proquest_miscellaneous_1730072711
Format
–
Schlagworte
coupling beams
,
damping
,
Design engineering
,
Dynamics
,
Earth sciences
,
Earth, ocean, space
,
Earthquake design
,
earthquakes
,
Earthquakes, seismology
,
Engineering and environment geology. Geothermics
,
Engineering geology
,
Exact sciences and technology
,
high-rise buildings
,
Internal geophysics
,
Joining
,
Marine
,
Philosophy
,
Seismic phenomena
,
shear walls
,
Vibration
,
viscoelastic coupling damper
,
Viscoelasticity
,
wind
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