Dynamic Response Reduction of Cantilevered Columns by Anchored Constrained Viscoelastic Layer Treatments
This paper proposes a new constrained viscoelastic (VE) layer treatment as a distributed supplemental damping mechanism for structural members. A steady-state solution of a cantilevered column utilizing this system is formulated under harmonic loading and validated with experimental shake table tests. Parametric studies indicated that the new treatment can reduce the elastic response of a 1/5-scale square column up to 20%, or increase the damping ratio of the column from 2% to 2.5%. They remain effective as the column begins rocking at the column-footing construction joint. The numerical results were found to be in general agreement with the shake table test data of two column specimens with and without VE layers. On the basis of the validated model, applying two VE layers of 2.38 mm-thick to cover the lower 50-90% height of a cantilevered column appears the most efficient, and can increase the damping ratio up to 12% for a full-scale column. The significant reduction in peak responses indicates that the proposed new constrained-layer system is promising for civil engineering applications. © 2012 American Society of Civil Engineers.
G. Chen et al., "Dynamic Response Reduction of Cantilevered Columns by Anchored Constrained Viscoelastic Layer Treatments," Journal of Engineering Mechanics, vol. 138, no. 1, pp. 12-21, American Society of Civil Engineers (ASCE), Jul 2011.
The definitive version is available at http://dx.doi.org/10.1061/(ASCE)EM.1943-7889.0000299
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Anchored Constraining Layer; Constrained-Layer Treatment; Distributed Damping; Distributed Mass System; Structural Dynamics; Viscoelastic Layers; Civil Engineering; Dynamic Response; Civil Engineering; Column; Harmonic Analysis
International Standard Serial Number (ISSN)
Article - Journal
© 2011 American Society of Civil Engineers (ASCE), All rights reserved.