Long-term Field Monitoring of Fatigue Cracks for Steel Bridges with Wireless Large-Area Strain Sensors

Sdiq Anwar Taher, Jian Li, Jong Hyun Jeong, Simon Laflamme, Hongki Jo, Caroline Bennett, William Collins, Han Liu, Austin Downey, Mona Shaheen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Steel bridges are susceptible to fatigue damage under traffic loading and many bridges operate with existing cracks. The discovery and long-term monitoring of those fatigue cracks are critical for safety evaluations. In previous studies, the ability of the soft elastomeric capacitor (SEC) sensor that measures large-area strain was validated for detecting and monitoring fatigue crack growth in a laboratory environment. In this study, the performance of the technology is evaluated for field applications, for which an approach for long-term monitoring of fatigue cracks is developed. The approach consists of an integrated system, termed the Wireless Large-Area Strain Sensors (WLASS), for wireless data collection and storage, and an algorithm for monitoring fatigue cracks with bridge response induced by traffic loading. In particular, the WLASS consists of soft elastomeric capacitors (SECs) combined with sensor boards to convert capacitance to a measurable change in voltage and a wireless sensing platform equipped with event-triggered sensing, wireless data collection, cloud storage, and remote data retrieval. A modified crack growth index (CGI) is developed through wavelet transform. Using the measurements from the integrated system, the modified CGI is able to obtain the crack status under impulsive loading events due to traffic. The performance of the developed approach is validated using a steel highway bridge.

Original languageEnglish (US)
Title of host publicationSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2022
EditorsDaniele Zonta, Daniele Zonta, Branko Glisic, Zhongqing Su
PublisherSPIE
ISBN (Electronic)9781510649675
DOIs
StatePublished - 2022
EventSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2022 - Virtual, Online
Duration: Apr 4 2022Apr 10 2022

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12046
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2022
CityVirtual, Online
Period4/4/224/10/22

Keywords

  • fatigue crack monitoring
  • large-area strain sensor
  • peak detection
  • soft elastomeric capacitor
  • steel bridges
  • structural health monitoring
  • traffic loads
  • wavelet transform
  • wireless sensors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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