Motion Sensors for Scour Monitoring: Laboratory Experiment with a Shallow Foundation

Yao, Congpu; Darby, Colin; Yu, Ok-Youn; Hurlebaus, Stefan; Chang, Kuang‐An; Price, J L; Hunt, B. E.; Briaud, Jean‐Louis

doi:10.1061/41095(365)96

Cited by 7 publications

(11 citation statements)

References 1 publication

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“…Yao et al . utilized a hammer impact to identify dynamic responses of bridge piers in the laboratory test. An impulse hammer was used to excite free vibration on a simulated single bridge pier (a steel square hollow beam) to identify its dynamic characteristics .…”

Section: Natural Frequency‐based Mechanisms and Excitation Methodsmentioning

confidence: 99%

“…Yao et al used the PNF of a bridge pier to experimentally study scour development by employing multiple sensors at a shallow foundation. To simulate the real superstructure, a concrete column with a diameter of 0.45 m and a length of 4 m was used to simulate the pier as shown in Figure 3a.…”

Section: Laboratory and Field Testsmentioning

confidence: 99%

“…Variation of the predominant natural frequency (PNF) in the flow direction [Reproduced from Yao et al]…”

Section: Laboratory and Field Testsmentioning

confidence: 99%

“…Briaud et al continued to refine the previous laboratory model to investigate the PNF‐bridge scour relationship in a deep foundation in addition to the shallow foundation. As shown in Figure b, eight rebars as piles were installed into the bottom of the concrete column to simulate the deep foundation combining a bridge pier and a pile foundation.…”

Section: Laboratory and Field Testsmentioning

confidence: 99%

“…As shown in Figure b, eight rebars as piles were installed into the bottom of the concrete column to simulate the deep foundation combining a bridge pier and a pile foundation. The model for both the shallow and deep foundations followed the same procedures as that used in Yao et al A bridge scour hole developed with the increase of the flow velocity. When the scour hole reached the bottom of the pier or the piles, the pier started to settle and rock.…”

Section: Laboratory and Field Testsmentioning

confidence: 99%

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Vibration-based bridge scour detection: A review

Bao

Liu

2016

Struct Control Health Monit

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Summary Scour around bridge foundations is regarded as one of the predominant causes of bridge failures. Traditional methods primarily employ underwater instruments to detect bridge scour depths, which thus have difficulties in instrument installations and operations. The concept of scour detection derived from vibration‐based damage detection has been explored in recent years to address such difficulties by investigating the natural frequency spectrum of a bridge or a bridge component. This paper presents a comprehensive review of existing studies on scour detection using the natural frequency spectrum of a bridge or a bridge component. Underlying mechanisms, laboratory and field tests, numerical studies, and data processing schemes are reviewed to summarize the state of the art, which are absent but urgently needed. Updates on recently developed scour monitoring sensors are also provided to complement the introduction. Based on the review, in‐depth discussions in existing studies are made regarding a few controversial and unsolved issues to shed light on future research, highlighting issues such as the soil–structure interaction, locations of the sensor installation, and the influence of shapes of scour holes.

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Section: Natural Frequency‐based Mechanisms and Excitation Methodsmentioning

confidence: 99%

Section: Laboratory and Field Testsmentioning

confidence: 99%

“…Variation of the predominant natural frequency (PNF) in the flow direction [Reproduced from Yao et al]…”

Section: Laboratory and Field Testsmentioning

confidence: 99%

Section: Laboratory and Field Testsmentioning

confidence: 99%

Section: Laboratory and Field Testsmentioning

confidence: 99%

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Vibration-based bridge scour detection: A review

Bao

Liu

2016

Struct Control Health Monit

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Critical insights for advanced bridge scour detection using the natural frequency

Bao

Swartz

Vitton

et al. 2017

Journal of Sound and Vibration

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Scour Monitoring Development for Two Bridges in Texas

et al. 2010

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Bridge scour monitoring using fixed instrumentation is a good way for the owner to be warned of imminent failure and to take appropriate action before exposing the public to undue risk. This paper demonstrates two cases of bridge scour monitoring systems developed for two bridges in Texas. The lessons learned from the two systems lead the authors to the conclusion that Tethered Buried Switches for early warning and tilt sensors for warning system should be preferred. Acceleration and frequency-based behavior tracked by motion sensors show promise but could only be demonstrated in laboratory experiments, with insufficient field data.

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Motion Sensors for Scour Monitoring: Laboratory Experiment with a Shallow Foundation

Cited by 7 publications

References 1 publication

Vibration-based bridge scour detection: A review

Vibration-based bridge scour detection: A review

Critical insights for advanced bridge scour detection using the natural frequency

Scour Monitoring Development for Two Bridges in Texas

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