2017
DOI: 10.1007/s13349-017-0238-3
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Isolating the location of scour-induced stiffness loss in bridges using local modal behaviour

Abstract: Detecting scour by analysing bridge vibrations is receiving an increasing amount of attention in the literature. Others have considered changes in natural frequency to indicate the presence of scour damage; however, little work has been reported on identifying the location of a scour hole based on vibration measurements. In this paper, a numerical study is carried out using a bespoke vehiclebridge-soil dynamic interaction model to examine how the first six vibration modes (Eigen frequencies) of a typical integ… Show more

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Cited by 34 publications
(47 citation statements)
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References 27 publications
(52 reference statements)
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“…Such scour fragility functions should be calibrated via soil-structure models in order to capture the global behaviour of the soil-structure system. 6,[24][25][26]…”
Section: Scour Actionmentioning
confidence: 99%
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“…Such scour fragility functions should be calibrated via soil-structure models in order to capture the global behaviour of the soil-structure system. 6,[24][25][26]…”
Section: Scour Actionmentioning
confidence: 99%
“…Methods based on frequency changes can be reliably applied to detect damage, 6,24,53 although they are usually unable to provide adequate information about the location of the damage (however, for a recent study related to scour damage localisation, see Ref. [26]). More effective methods for detecting the location of seismic-induced damage include those based on the analysis of changes in modal 52 or operational [54][55][56][57][58] shapes or their derivatives.…”
Section: Monitoring Approaches For Seismic-damage Detectionmentioning
confidence: 99%
“…Most of these methods involve measuring the dynamic response of a bridge or bridge element using an accelerometer or otherwise, and observing how modal properties change when the foundation stiffness is compromised by scour. A variety of authors have investigated various aspects of the potential applicability of these approaches, in (Briaud et al , 2011;Chen, et al, 2014;Elsaid & Seracino, 2014;Foti & Sabia, 2010;Klinga & Alipour, 2015;Prendergast, et al 2013Prendergast, et al , 2016Prendergast, et al and 2017.…”
Section: Indirect Monitoringmentioning
confidence: 99%
“…One of the more pressing and less investigated problems with vibration-based scour monitoring is where to place sensors to ensure the desired modal characteristics of the structure under investigation are detected. A recent study by Prendergast et al (2017) postulated that various sub-structural bridge elements (piers, abutment, and piles) act locally when affected by scour. This implies that a mode of vibration 1 8/ 1 3 ( 3) local to the pier, is only affected by scour at the pier (and other elements are unaffected).…”
Section: Effective Sensor Placement For Adequate Modal Analysis and Dmentioning
confidence: 99%
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