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Lookup NU author(s): Dr Bruna LopesORCiD
This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Society of Civil Engineers, 2022.
For re-use rights please refer to the publisher's terms and conditions.
There are many historical bridges around the world whose crucial information regarding their foundations is unknown. Such information is essential for an accurate safety assessment regarding scour hazard. Current methods for identification of bridge foundation characteristics are typically expensive, potentially disruptive, and limited in their applications. Thus, the numerical feasibility study described in this paper assessed whether a nondestructive geophysical technique such as electrical resistivity tomography (ERT) could be used for this purpose. Synthetic scenarios were created accounting for different combinations of material resistivity. Two standard measurement sequences (dipole–dipole and Schlumberger) and an optimized one (“Compare R” method) were tested. Results showed that the depth of the bridge foundation was roughly well represented in all cases. However, the optimized sequence revealed slightly better results. Although this small improvement observed did not significantly affect the results of the simplified scenarios assessed by this study, it could be decisive for more complex scenarios. These findings demonstrated that ERT can be used to identify the depth of bridge foundations in an inexpensive, rapid, and nonintrusive way, allowing for more accurate assessment of bridge safety and scour risk ratings.
Author(s): Cardoso GAF, Lopes BCFL
Publication type: Article
Publication status: Published
Journal: Journal of Bridge Engineering
Year: 2022
Volume: 27
Issue: 7
Print publication date: 01/07/2022
Online publication date: 11/05/2022
Acceptance date: 15/03/2022
Date deposited: 22/07/2022
ISSN (print): 1084-0702
ISSN (electronic): 1943-5592
Publisher: American Society of Civil Engineers
URL: https://doi.org/10.1061/(ASCE)BE.1943-5592.0001894
DOI: 10.1061/(ASCE)BE.1943-5592.0001894
ePrints DOI: 10.57711/gr1c-r806
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