Experimental Dynamic Characterization and Finite-Element Updating of a Footbridge Structure
Publication: Journal of Performance of Constructed Facilities
Volume 29, Issue 4
Abstract
Nowadays, modern analysis of civil engineering structures implies the use of increasingly sophisticated computer models, designed not only to predict the response of actual structures to different loadings, but also to simulate the effects of eventual modifications in their structural configuration. Nevertheless, it is often discovered that when the numerical simulations are compared with experimental data, the degree of correlation is weak, thus preventing the use of the finite-element (FE) models with confidence in further analyses. In such cases, FE updating techniques are available to correct the FE models, based on dynamic response records of the real structures. These updating processes usually consist of four phases: preliminary FE modeling, experimental modal identification, manual sensitivity analysis and, finally, updating the FE model. The present paper presents all four phases of a successful updating process for the FE model of a footbridge structure. It is shown how the last phase of the process can be performed fully automatically by coupling an optimization routine with a commercial FE analysis program.
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Acknowledgments
This work is part of the research developed in the Department of Civil Engineering, Faculdade de Ciências e Tecnologia, supported by contract PTDC/ECM/117618/2010 with Fundação para a Ciência e Tecnologia. Cooperation with Doctor APN Campos Costa from National Laboratory of Civil Engineering is gratefully acknowledged.
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Published In
Journal of Performance of Constructed Facilities
Volume 29 • Issue 4 • August 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jan 21, 2014
Accepted: Apr 7, 2014
Published online: Apr 10, 2014
Discussion open until: Feb 3, 2015
Published in print: Aug 1, 2015
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