Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Development of Smart Seismic Device Using FBG Sensor for Measuring Vertical Load

수직하중 계측을 위한 FBG센서 기반 스마트 교량 내진장치의 개발

  • Chang, Sung-Jin (Department of Civil & Environmental Engineering, Pusan National University) ;
  • Kim, Nam-Sik (Department of Civil & Environmental Engineering, Pusan National University) ;
  • Baek, Joon-Ho (Department of Engineering Research, ESCO RTS)
  • Received : 2012.07.31
  • Accepted : 2012.09.13
  • Published : 2012.11.20
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Abstract

A faulting could be occurred at the end of deck by unexpected loads to bridge bearing after a bridge completion. Serviceability of bridges could be impaired by the faulting which is caused structural damage. Therefore, smart bridge bearing which can continuously observe the supporting points is needed. Some of bridge bearings have been developed for measuring vertical load and vertical displacement by installing sensors in the bearing. In those systems, however it is not easy to be replaced with new sensors when repairs are needed. In this study, the smart bridge bearing of which sensors can be replaced has been developed to overcome such a problem. In this study, strain signals were used for measuring both of vertical displacements and loads. FBG sensors(fiber optic Bragg-grating sensors) have been used for measurement of the strain signals since it is prevented from electronic noise by mediating light, enables the simplification of the measuring cable by multiple measurement, and is easy to place by lightweight and small size. The possibility of use was reviewed for smart bridge bearing based on FBG sensors through tests.

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References

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