Stiffness Assessment through Modal Analysis of an RC Slab Bridge before and after Strengthening
Publication: Journal of Bridge Engineering
Volume 11, Issue 5
Abstract
As part of Main Roads Western Australia’s (MRWA) bridge management and bridge upgrading program, MRWA bridge no. 3014 was assessed to evaluate its condition before and after strengthening works with carbon-fiber-reinforced-polymers (CFRP). The assessment process coupled analytical results with field observations and dynamic testing of the structure. Vibration-based structural assessment of the bridge was conducted before and after the completion of the upgrading works. This paper presents the results of the vibration tests and modal analysis performed before and after the structure upgrading. In particular, the change in the structural properties and stiffness, before and after the strengthening, based on the analyses of the updated models of the bridge, is presented and discussed. The results demonstrate the effectiveness of using the dynamic assessment method to determine the elastic flexural stiffness of bridge structures retrofitted with CFRP.
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Acknowledgments
The authors would like to thank Adam Lim and Jock Scanlon of MRWA and Peter Coughlan of BG&E for providing the structural information for MRWA bridge no. 3014, the assistance and support during the testing sessions, and the opportunity for carrying out a dynamic-based assessment of the structure. Many thanks to Minhdu Nguyen, Craig Boston, Jim Waters, Alex Duff, and Wayne Galbraith for their help in the test preparation and on-site work. Partial financial support from the Australian Research Council, under grant LP0453783, is also acknowledged.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 11 • Issue 5 • September 2006
Pages: 590 - 601
Copyright
© 2006 ASCE.
History
Received: Feb 9, 2005
Accepted: Jul 15, 2005
Published online: Sep 1, 2006
Published in print: Sep 2006
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