Development of Dynamic-Response-Based Objective Functions for Finite-Element Modeling of Bridges
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Volume 12, Issue 5
Abstract
The basic mechanism and procedures of finite-element (FE) bridge modeling and calibration are briefly presented. Different physical parameters of FE models are adjusted during the calibration process. Dynamic-response-based objective functions are carefully developed based on two powerful indices: the modal assurance criterion and frequency correlation trend line. The nominal bridge models are calibrated by minimizing the quantified difference between analytical results and experimental measurements. Using an existing calibration strategy, a nominal FE bridge model is optimized by minimizing this global dynamic-response-based objective function. The value of the objective function is reduced from 10.70 to 4.61%. The minimization of the objective function indicates the convergence of calibration and it is shown that the automated calibration becomes practical due to the formulation of the dynamic-response-based objective function.
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Acknowledgments
The writers gratefully acknowledge the sponsors of this research: the National Science Foundation, the Federal Highway Administration, the American Society for Nondestructive Testing, and the Ohio Department of Transportation.
References
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Published In
Journal of Bridge Engineering
Volume 12 • Issue 5 • September 2007
Pages: 552 - 559
Copyright
© 2007 ASCE.
History
Received: Jul 6, 2004
Accepted: Dec 20, 2005
Published online: Sep 1, 2007
Published in print: Sep 2007
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