Self-sufficient and self-contained sensing for local monitoring of in-situ bridge structures

Hoon Sohn, Hyung Jin Lim, Ji Min Kim, Suyoung Yang, Jun Lee, Yongtak Kim, Peipei Liu, Yujin Jang, Gun Woo Moon, Yung Yi, Daewoo Kim, Jaeha Kim, Sung Youb Jung

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

1 Citation (Scopus)

Abstract

While conventional vibration-based monitoring provides an overall assessment of a bridge structure's condition, it often fails in providing early warning for local damage. In this study, two separate sensor modules are developed for online tracking of post-tension (PT) tendon force loss and fatigue crack detection. An embeddable PT tendon force monitoring sensor, which periodically inspects the force level of the PT tendons inside a pre-stressed concrete (PSC) bridge, is developed based on eddy current measurement, and magnetic inductive coupling is used to transmit power and data between an external measurement system and the eddy current sensor embedded inside a PSC bridge. Next, a wireless fatigue crack detection sensor is developed to detect nonlinear ultrasonic modulation produced by a fatigue crack, and the sensor module is powered by a multi-mode energy harvester, which harnesses energy from sun light, low-frequency vibration and RF signals. Laboratory and field tests have demonstrated that the proposed techniques can detect a fatigue crack smaller than 100 ?m in width and about 40% loss of the initial PT tendon force.

Original languageEnglish
Title of host publication8th European Workshop on Structural Health Monitoring, EWSHM 2016
PublisherNDT.net
Pages13-22
Number of pages10
ISBN (Electronic)9781510827936
Publication statusPublished - 2016
Event8th European Workshop on Structural Health Monitoring, EWSHM 2016 - Bilbao, Spain
Duration: 2016 Jul 52016 Jul 8

Publication series

Name8th European Workshop on Structural Health Monitoring, EWSHM 2016
Volume1

Other

Other8th European Workshop on Structural Health Monitoring, EWSHM 2016
Country/TerritorySpain
CityBilbao
Period16/7/516/7/8

Bibliographical note

Funding Information:
This study is supported by a grant from Smart Civil Infrastructure Research Program (13SCIPA01) funded by Ministry of Land, Infrastructure and Transport (MOLIT) of Korea government, and the Smart IT Convergence System Research Center as Global Frontier Project (CISS-2012M3A6A6054195) funded by the Ministry of Education, Science and Technology (MEST).

All Science Journal Classification (ASJC) codes

  • Health Information Management
  • Computer Science Applications

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