Application of Nonlinear Model Updating for a Reinforced Concrete Shear Wall
Publication: Journal of Engineering Mechanics
Volume 139, Issue 5
Abstract
The detection of changes in vibrational behavior has long been applied as a potential means of damage detection. However, existing damage diagnosis techniques are primarily limited to linear models in which the stiffness of some of the elements is reduced to represent damage. Although these methods appear to be adequate for locating and quantifying the present damage in the structure, they are not sufficient for determining future performance of the structure, which can only be determined using nonlinear models. This paper focuses on the challenging task of updating nonlinear models for reinforced concrete civil engineering structures. A nonlinear hysteretic material model is applied to accurately portray the fundamental hysteretic behavior of concrete structures. A systematic methodology to perform damage detection and, more importantly, update the nonlinear model for prediction is proposed. This new method is designed to use low-level ambient vibration data to detect changes in the modal parameters. With the acquired modal information, the damage parameters that control the nonlinear material model are updated. The final updated nonlinear model may be utilized not only to evaluate the structure’s current damage state but also to predict its future behavior. A concrete shear wall is analyzed numerically to demonstrate the proposed method.
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Acknowledgments
The authors are grateful to the National Science Foundation for financing this research through Grant Nos. CMMI 0245402, CMMI 0625640, and CMMI 1002641.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 139 • Issue 5 • May 2013
Pages: 635 - 649
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Oct 12, 2011
Accepted: Aug 2, 2012
Published online: Aug 13, 2012
Published in print: May 1, 2013
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