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Stiffness Assessment through Modal Analysis of an RC Slab Bridge before and after Strengthening |
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| Authors: | Giovanna Zanardo Hong Hao Yong Xia Andrew J Deeks |
| Affiliation: | 1Lecturer, The Univ. of Sheffield, Dept. of Civil and Structural Engineering, Sir Frederick Mappin Building, Sheffield, S1 3JD, U.K. E-mail: g.zanardo@sheffield.ac.uk 2Prof. of Structural Dynamics, School of Civil and Resource Engineering, Univ. of Western Australia, 35 Stirling Highway, Crawley, WA 6009. E-mail: hao@civil.uwa.edu.au 3School of Civil and Resource Engineering, Univ. of Western Australia, 35 Stirling Highway, Crawley, WA 6009. E-mail: xia@civil.uwa.edu.au 4Prof. and Head, School of Civil and Resource Engineering, Univ. of Western Australia, 35 Stirling Highway, Crawley, WA 6009. E-mail: deeks@civil.uwa.edu.au |
| 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. |
| Keywords: | Stiffness Modal analysis Slabs Bridges Fiber reinforced polymers Dynamic tests Assessments |