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Structural Monitoring and Maintenance Volume 10, Number 3, September 2023 , pages 191-205 DOI: https://doi.org/10.12989/smm.2023.10.3.191 |
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Monitoring and performance assessment of a highway bridge via operational modal analysis |
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Reza Akbari, Saeed Maadani and Shahrokh Maalek
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| Abstract | ||
| In this paper, through operational modal analysis and ambient vibration tests, the dynamic characteristics of a multi-span simply-supported reinforced concrete highway bridge deck was determined and the results were used to assess the quality of construction of the individual spans. Supporting finite element (FE) models were created and analyzed according to the design drawings. After carrying out the dynamic tests and extracting the modal properties of the deck, the quality of construction was relatively assessed by comparing the results obtained from all the tests from the individual spans and the FE results. A comparison of the test results among the different spans showed a maximum difference value of around 9.3 percent between the superstructure's natural frequencies. These minor differences besides the obtained values of modal damping ratios, in which the differences were not more than 5 percent, can be resulted from suitable performance, health, and acceptable construction quality of the bridge. | ||
| Key Words | ||
| acceleration sensor; bridge; modal analysis; structural health monitoring | ||
| Address | ||
| Reza Akbari: Road Maintenance Department, Road Maintenance and Transportation Organization, Tehran, Iran Saeed Maadani: Department of Engineering, Takestan Branch, Islamic Azad University, Takestan, Iran Shahrokh Maalek: School of Civil Engineering, University of Tehran, Tehran, Iran | ||
