Multiresponse Parameter Estimation for Finite-Element Model Updating Using Nondestructive Test Data
Publication: Journal of Structural Engineering
Volume 133, Issue 8
Abstract
Structural health monitoring using field measurements has developed into a major research area, responding to an increasing demand for evaluating the integrity of civil engineering structures. Model updating through parameter estimation is a key tool in a successful structural health monitoring program. A method for parameter estimation is developed for simultaneous use of static and modal nondestructive test data called the “multiresponse” parameter estimation. An error function normalization technique is also developed to facilitate effective multiresponse parameter estimation. This normalization technique can mitigate some of the numerical issues encountered during the parameter estimation procedure. However, this technique does not degrade the integrity of the parameter estimation procedure. Multiresponse parameter estimation provides an increased level of flexibility and feasibility of model updating for structural health monitoring. This paper presents full integration of static and modal nondestructive test data using both stiffness-based and mass-based error functions for structural health monitoring. A benchmark laboratory grid model of a bridge deck is utilized to illustrate application of both normalization and multiresponse parameter estimation for updating the stiffness and mass parameters using nondestructive test data.
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Acknowledgments
The writers are grateful for partial funding of this research by NSF Grant No. NSFCMS-9622067. They would like to thank Professors Aktan (Drexel University) and Helmicki (The University of Cincinnati) and their students for performing the experiments on the physical model and for access to this experimental data.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 133 • Issue 8 • August 2007
Pages: 1067 - 1079
Copyright
© 2007 ASCE.
History
Received: Feb 15, 2006
Accepted: Jan 8, 2007
Published online: Aug 1, 2007
Published in print: Aug 2007
Notes
Note. Associate Editor: Ahmet Emin Aktan
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