Assessment and code considerations for the combined effect of seismic base-isolation and viscoelastic dampers

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Title: Assessment and code considerations for the combined effect of seismic base-isolation and viscoelastic dampers
Authors: Erkal, AykutTezcan, Semih S.Laefer, Debra F.
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Date: 2011
Online since: 2012-05-11T15:55:57Z
Abstract: To propose an initial formulation for the passive control section of the Turkish Earthquake Code, the impact of base isolation and viscoelastic dampers on a four-story reinforced concrete (RC) frame building was considered under various one-dimensional earthquake excitations. Both statically equivalent seismic load methods (comparing Turkish Earthquake code with Uniform Building Code) and linear time history analyses were applied to the RC building based on a portion of the 1999 Kocaeli Earthquake ground motion record (modified to possess predominant spectral periods of T1=0.13 sec and T2=1.43 sec). Effective peak ground acceleration was set to 0.40g representing hard and soft soil conditions, respectively. Time history variations of upper column displacements and bending moments were compared, as well as story drift ratios. Reductions of the fixed-base case displacements and column bending moments were obtained of up to 73% under base-isolation, up to 25% with viscoelastic dampers, and up to 83% (with a unified response reduction factor) when both devices were both present.
Funding Details: Not applicable
Type of material: Journal Article
Publisher: Hindawi Publishing Corporation
Journal: ISRN Civil Engineering
Volume: 2011
Issue: 2011
Copyright (published version): 2011 Aykut Erkal et al.
Keywords: Passive ControlBase IsolationViscoelasticityDampingSeismic DesignStandards and codesCracksPreservation
Subject LCSH: Viscoelasticity
Damping (Mechanics)
Earthquake resistant design
DOI: 10.5402/2011/861451
Language: en
Status of Item: Peer reviewed
Appears in Collections:Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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