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Long-term monitoring and assessment of a precast continuous viaduct

Sousa, H, Sousa, C, Neves, AS, Figueiras, J and Bento, J (2011) Long-term monitoring and assessment of a precast continuous viaduct Structure and Infrastructure Engineering, 9 (8). pp. 777-793.

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Abstract

Precast girders have recently been widely employed in the construction of bridges and viaducts. The new bridge over the Tagus River in Portugal, the Lezíria Bridge, comprehends a 9160 m long south approach viaduct, which was built with precast girders made continuous in situ. Given the relevance of this construction, a long-term monitoring system was implemented and measurements were taken since the start of the construction. The observed parameters were concrete strains and temperatures, deck rotations, joint displacements, accelerations and also environment temperature and relative humidity. The work presents the precast structure, the monitoring system and the appraisal of a statistical procedure for the long-term assessment of the structural behaviour. This procedure is based on prediction models, which establish the normal correlation patterns between environmental and material parameters (such as concrete temperature and shrinkage strains), and the observed structural response in terms of strains, rotations and movements of expansion joints. The calculation of the normal correlation pattern comprehends the minimisation of a square error. By applying the prediction model to the structural response measured in the south approach viaduct of the Lezíria Bridge, it was found that this methodology is a feasible tool for real-time damage detection of bridges. © 2013 Copyright Taylor and Francis Group, LLC.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
AuthorsEmailORCID
Sousa, HUNSPECIFIEDUNSPECIFIED
Sousa, CUNSPECIFIEDUNSPECIFIED
Neves, ASUNSPECIFIEDUNSPECIFIED
Figueiras, JUNSPECIFIEDUNSPECIFIED
Bento, JUNSPECIFIEDUNSPECIFIED
Date : 19 September 2011
Identification Number : 10.1080/15732479.2011.614260
Additional Information : This is an Author's Accepted Manuscript of an article published in Structure and Infrastructure Engineering 19 Sep 2011 [copyright Taylor & Francis], available online at: http://www.tandfonline.com/10.1080/15732479.2011.614260.
Depositing User : Symplectic Elements
Date Deposited : 11 Sep 2013 09:10
Last Modified : 23 Sep 2013 20:13
URI: http://epubs.surrey.ac.uk/id/eprint/791763

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