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A visco-plastic device for seismic protection of structures
Faculty
Not Specified
Year:
2007
Type of Publication:
Article
Pages:
1515-1528
Authors:
Ibrahim, Yasser E, Marshall, Justin, Charney, Finley A
DOI:
10.1016/j.jcsr.2007.01.007
Journal:
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH ELSEVIER SCI LTD
Volume:
63
Research Area:
Construction \& Building Technology; Engineering
ISSN
ISI:000250281600008
Keywords :
dampers, finite element analysis, passive control, plasticity, seismic design, viscoelasticity
Abstract:
A new visco-plastic damper (VPD) for seismic protection of structures is introduced in this paper. This device combines and enhances many of the proven characteristics of both displacement-dependent and velocity-dependent devices. The VPD device consists of a block of a high-damping viscoelastic material sandwiched between two steel shapes (plates or channels) bent in a certain configuration to amplify the deformations in the device in order to obtain large tensile and compressive strains in the viscoclastic material. Under low levels of vibrations, the device dissipates energy through amplified axial strains in the viscoelastic material only, however under moderate to strong levels of vibrations, a new source of energy dissipation is added through the yielding of the steel elements. In addition to the energy dissipation, the device provides stiffness through the steel elements as well as the viscoelastic material. (C) 2007 Elsevier Ltd. All rights reserved.
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