Vibration-Based Identification for the Presence of Scouring of Cable-Stayed Bridges

Wen Xiong, Bo Kong, Pingbo Tang, Jianshu Ye

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This study applies structural dynamics monitoring to identify the presence of bridge scouring through tracing the changes of vibration characteristics induced by scour. Four scour-indicating dynamic features, i.e., the frequency change ratio, modal assurance criterion, mode shape curvature, and flexibility-based deflection, are applied as the scour indicators. Based upon the study of a cable-stayed bridge, each scour indicator is calculated and its corresponding relationship with scour depth is obtained. The feasibilities and effects of using each indicator ae comprehensively examined. After comparison, the flexibility-based deflection is finally recommended as a sensitive and practical indicator to identify the presence of the scouring. When applied in practice, the deflection can first be extracted from the ambient vibration measurement; then the scour depth can be back-deduced based on the preobtained relationship between the deflection and scour depth. For the specific cable-stayed bridge investigated in this study, the pylon-based deflection indicator can identify the scour presence more effectively and distinguishably. The scour location can also be known because the scoured pylon or pier shows many obvious deflection changes compared with those without scour effects. This study demonstrates that tracing the change of vibration responses can both qualitatively and quantitatively identify the scour of cable-stayed bridges. This vibration-based technique does not require any underwater devices or operations, which could be integrated into a routine assessment task for bridges.

Original languageEnglish (US)
Article number04018007
JournalJournal of Aerospace Engineering
Volume31
Issue number2
DOIs
StatePublished - Mar 1 2018

Fingerprint

Cable stayed bridges
Scour
Vibration measurement
Piers
Structural dynamics

Keywords

  • Cable-stayed bridges
  • Flexibility-based deflection
  • Indicators
  • Modal assurance criterion
  • Mode shape curvature
  • Natural frequency
  • Scour
  • Vibration-based identification

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanical Engineering

Cite this

Vibration-Based Identification for the Presence of Scouring of Cable-Stayed Bridges. / Xiong, Wen; Kong, Bo; Tang, Pingbo; Ye, Jianshu.

In: Journal of Aerospace Engineering, Vol. 31, No. 2, 04018007, 01.03.2018.

Research output: Contribution to journalArticle

@article{8596af176e3f4eb5870cefa16ad589b0,
title = "Vibration-Based Identification for the Presence of Scouring of Cable-Stayed Bridges",
abstract = "This study applies structural dynamics monitoring to identify the presence of bridge scouring through tracing the changes of vibration characteristics induced by scour. Four scour-indicating dynamic features, i.e., the frequency change ratio, modal assurance criterion, mode shape curvature, and flexibility-based deflection, are applied as the scour indicators. Based upon the study of a cable-stayed bridge, each scour indicator is calculated and its corresponding relationship with scour depth is obtained. The feasibilities and effects of using each indicator ae comprehensively examined. After comparison, the flexibility-based deflection is finally recommended as a sensitive and practical indicator to identify the presence of the scouring. When applied in practice, the deflection can first be extracted from the ambient vibration measurement; then the scour depth can be back-deduced based on the preobtained relationship between the deflection and scour depth. For the specific cable-stayed bridge investigated in this study, the pylon-based deflection indicator can identify the scour presence more effectively and distinguishably. The scour location can also be known because the scoured pylon or pier shows many obvious deflection changes compared with those without scour effects. This study demonstrates that tracing the change of vibration responses can both qualitatively and quantitatively identify the scour of cable-stayed bridges. This vibration-based technique does not require any underwater devices or operations, which could be integrated into a routine assessment task for bridges.",
keywords = "Cable-stayed bridges, Flexibility-based deflection, Indicators, Modal assurance criterion, Mode shape curvature, Natural frequency, Scour, Vibration-based identification",
author = "Wen Xiong and Bo Kong and Pingbo Tang and Jianshu Ye",
year = "2018",
month = "3",
day = "1",
doi = "10.1061/(ASCE)AS.1943-5525.0000826",
language = "English (US)",
volume = "31",
journal = "Journal of Aerospace Engineering",
issn = "0893-1321",
publisher = "American Society of Civil Engineers (ASCE)",
number = "2",

}

TY - JOUR

T1 - Vibration-Based Identification for the Presence of Scouring of Cable-Stayed Bridges

AU - Xiong, Wen

AU - Kong, Bo

AU - Tang, Pingbo

AU - Ye, Jianshu

PY - 2018/3/1

Y1 - 2018/3/1

N2 - This study applies structural dynamics monitoring to identify the presence of bridge scouring through tracing the changes of vibration characteristics induced by scour. Four scour-indicating dynamic features, i.e., the frequency change ratio, modal assurance criterion, mode shape curvature, and flexibility-based deflection, are applied as the scour indicators. Based upon the study of a cable-stayed bridge, each scour indicator is calculated and its corresponding relationship with scour depth is obtained. The feasibilities and effects of using each indicator ae comprehensively examined. After comparison, the flexibility-based deflection is finally recommended as a sensitive and practical indicator to identify the presence of the scouring. When applied in practice, the deflection can first be extracted from the ambient vibration measurement; then the scour depth can be back-deduced based on the preobtained relationship between the deflection and scour depth. For the specific cable-stayed bridge investigated in this study, the pylon-based deflection indicator can identify the scour presence more effectively and distinguishably. The scour location can also be known because the scoured pylon or pier shows many obvious deflection changes compared with those without scour effects. This study demonstrates that tracing the change of vibration responses can both qualitatively and quantitatively identify the scour of cable-stayed bridges. This vibration-based technique does not require any underwater devices or operations, which could be integrated into a routine assessment task for bridges.

AB - This study applies structural dynamics monitoring to identify the presence of bridge scouring through tracing the changes of vibration characteristics induced by scour. Four scour-indicating dynamic features, i.e., the frequency change ratio, modal assurance criterion, mode shape curvature, and flexibility-based deflection, are applied as the scour indicators. Based upon the study of a cable-stayed bridge, each scour indicator is calculated and its corresponding relationship with scour depth is obtained. The feasibilities and effects of using each indicator ae comprehensively examined. After comparison, the flexibility-based deflection is finally recommended as a sensitive and practical indicator to identify the presence of the scouring. When applied in practice, the deflection can first be extracted from the ambient vibration measurement; then the scour depth can be back-deduced based on the preobtained relationship between the deflection and scour depth. For the specific cable-stayed bridge investigated in this study, the pylon-based deflection indicator can identify the scour presence more effectively and distinguishably. The scour location can also be known because the scoured pylon or pier shows many obvious deflection changes compared with those without scour effects. This study demonstrates that tracing the change of vibration responses can both qualitatively and quantitatively identify the scour of cable-stayed bridges. This vibration-based technique does not require any underwater devices or operations, which could be integrated into a routine assessment task for bridges.

KW - Cable-stayed bridges

KW - Flexibility-based deflection

KW - Indicators

KW - Modal assurance criterion

KW - Mode shape curvature

KW - Natural frequency

KW - Scour

KW - Vibration-based identification

UR - http://www.scopus.com/inward/record.url?scp=85042010078&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85042010078&partnerID=8YFLogxK

U2 - 10.1061/(ASCE)AS.1943-5525.0000826

DO - 10.1061/(ASCE)AS.1943-5525.0000826

M3 - Article

VL - 31

JO - Journal of Aerospace Engineering

JF - Journal of Aerospace Engineering

SN - 0893-1321

IS - 2

M1 - 04018007

ER -