Finite-Element Model Updating for Assessment of Progressive Damage in a 3-Story Infilled RC Frame
Publication: Journal of Structural Engineering
Volume 139, Issue 10
Abstract
This paper presents a study on the identification of progressive damage, using an equivalent linear finite-element model updating strategy, in a masonry infilled RC frame that was tested on a shake table. A two-thirds-scale, 3-story, 2-bay, infilled RC frame was tested on the UCSD–NEES shake table to investigate the seismic performance of this type of construction. The shake table tests induced damage in the structure progressively through scaled historical earthquake records of increasing intensity. Between the earthquake tests and at various levels of damage, low-amplitude white-noise base excitations were applied to the infilled RC frame. In this study, the effective modal parameters of the damaged structure have been identified from the white-noise test data with the assumption that it responded in a quasi-linear manner. Modal identification has been performed using a deterministic-stochastic subspace identification method based on the measured input–output data. A sensitivity-based finite-element model updating strategy has been employed to detect, locate, and quantify damage (as a loss of effective local stiffness) based on the changes in the identified effective modal parameters. The results indicate that the method can reliably identify the location and severity of damage observed in the tests.
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Acknowledgments
The shake table tests discussed in this paper were supported by the National Science Foundation Grant No. 0530709 awarded under the George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) program. Input from other collaborators at Stanford University and the University of Colorado at Boulder and a Professional Advisory Panel (PAP) during the planning, design, and performance of these shake table tests is gratefully acknowledged. The panel members are David Breiholz, John Kariotis, Gregory Kingsley, Joe Maffei, Ron Mayes, Paul Murray, and Michael Valley. Also, the writers thank the technical staff at the Englekirk Structural Engineering Center of University of California—San Diego and Mr. Ioannis Koutromanos for their assistance in the shake table tests. The opinions expressed in this paper are those of the authors and do not necessarily represent those of the NSF, the collaborators, or the PAP.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 139 • Issue 10 • October 2013
Pages: 1665 - 1674
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Apr 11, 2011
Accepted: Feb 17, 2012
Published online: Feb 22, 2012
Published in print: Oct 1, 2013
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