Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
권호 표지
DOI QR코드

DOI QR Code

Earthquake Movement Measurement of the Top of Bridge Pier Using Fiber Optic Smart Structure Concept

광섬유 스마트 구조물의 개념을 이용한 교량상부 내진거동 측정

  • Published : 2006.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, a long gauge Fiber Bragg Grating (FBG) sensor system is described and long gauge FBGs are well-suited for measuring the upper parts of the bridge piers under the extremely severe movement conditions. In the experiments, we used more than 30m long FBG sensors to measure the movement of top part of the bridge piers which are separated from the main bridge by cutting the decks. With the actuator, the deck and girders were pushed and released. We checked the movement of the top of the pier while releasing the pressure of the actuator with the long gauge fiber sensor. In order to measure the movement of the upper part of the pier, the reference point must be outside of the pier. Using the optical fiber sensors, one end of the sensor is attached to the top of the pier and the other end is attached to the bottom of the next pier. The fiber sensors showed good response to the release loading and we could calculate the movement of the top part of the pear.

Keywords

References

  1. R. M. Measures, 'Fiber optic sensor considerations and developments for smart structures,' Proc. SPIE, Vol. 1588, 1991, pp. 282
  2. Kim, K. S., L. Kollar and G. S. Springer, 'A Model of Embedded Fiber Optic Fabry-Perot Temperature and Strain Sensors,' J. of Composite Materials, Vol. 27, 1993, pp. 18-1662
  3. Kim, K. S., A. Segall and G. S. Springer, 'The Use of Strain Measurements for Detecting Delaminations in Composite Laminates,' Composite Structures, Vol. 23, 1993, pp. 75-84 https://doi.org/10.1016/0263-8223(93)90076-3
  4. Konig, G., and G. Giegerich, 'Identification of Structural Properties Using Dynamic Tests,' Proc. IABSE Symp. on Durability of Struct .. IABSE, Lisbon, Portukal, 1989, pp. 835-840
  5. Shah P., and Udwadis, F. E.(1978), 'A Methodology for Optimal Sensor Locations for Identification of Dynamic Systems,' J. Appl. Mech.. 45, 1978, pp. 188-196 https://doi.org/10.1115/1.3424225
  6. Toksoy, T., Chuntavan, C. and A. E. Aktan, 'Modal Analysis for Damage Detection In Structures,' Discussion, Journal of Structural Engineering., ASCE, February, 1993
  7. R. Favre and J. Markey, 'Long-Term Monitoring of Bridge Deformation,' A.S.Nowak(ed.), Bridge Evaluation, Repair and Rehabilitation, Kluwer Academic Publishers, 1990, pp. 85-100
  8. Shushkewick K. W., 'Time Dependent Analysis of Segmental Bridges,' Computers & Structures, Vol. 23, No. 1, 1986, pp. 95-118 https://doi.org/10.1016/0045-7949(86)90111-2
  9. M. Saide, Joseph Shields and Rodney Johnson, 'Monitoring Prestress Forces in a Box Girder Bridges,' A.S. Nowak(ed.) Bridge Evaluation, Repair and Rehabilitation, Kluwer Academic Publishers, 1990, pp. 217-228