Journal
COMPUTERS & STRUCTURES
Volume 88, Issue 1-2, Pages 45-53Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compstruc.2009.08.001
Keywords
Rayleigh damping; Inelastic responses; Structural damping; Dynamic analysis; Seismic response; Seismic evaluation
Funding
- National Science Foundation through the Pacific Earthquake Engineering Research (PEER) Center
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This study addresses some of the pitfalls of conventional numerical modeling of Rayleigh-type damping in inelastic structures. A practical modeling approach to solve these problems is proposed. Conventional modeling of Rayleigh-type damping for inelastic structures generates responses in which unrealistic damping forces are present that results in underestimation of peak displacement demands, overestimation of peak strength demands, and underestimation of buildings' collapse potential. The approach proposed in this paper avoids these problems by modeling each structural element with an equivalent combination of one elastic element with stiffness-proportional damping, and two springs at its two ends with no stiffness proportional damping. (C) 2009 Elsevier Ltd. All rights reserved.
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