Measurement of Transfer Length for a Seven-Wire Strand with FBG Sensors

FBG 센서를 이용한 강연선 전달길이 측정

  • Lee, Seong-Cheol (Department of NPP Engineering, KEPCO International Nuclear Graduate School) ;
  • Choi, Song-Yi (Department of Marine and Civil Engineering, Chonnam National Univ.) ;
  • Shin, Kyung-Joon (Department of Civil Engineering, Chungnam National Univ.) ;
  • Kim, Jae-Min (Department of Marine and Civil Engineering, Chonnam National Univ.) ;
  • Lee, Hwan-Woo (Department of Civil Engineering, Pukyung National Univ.)
  • 이성철 (국제원자력대학원대학교 원자력산업학과) ;
  • 최송이 (전남대학교 해양토목공학과) ;
  • 신경준 (충남대학교 토목공학과) ;
  • 김재민 (전남대학교 해양토목공학과) ;
  • 이환우 (부경대학교 토목공학과)
  • Received : 2015.10.26
  • Accepted : 2015.11.25
  • Published : 2015.12.29


In this paper, an experimental program has been conducted to investigate transfer length in high strength concrete members pretensioned through a seven-wire strand with FBG sensors. To measure transfer length, five members were fabricated, which had a length of 3 m and a cross-section of $150{\times}150mm$. It was measured that the concrete compressive strength was 58MPa at pretensioning. Test results indicated that more precise and reliable measurement on the transfer length was attained with FBG sensors than conventional gauges attached on concrete surface. Through comparing the measured transfer length and predictions, applicability of several transfer length models in literature was investigated. This paper can be useful for relevant research field such as investigation on the bond mechanism of a seven-wire strand in concrete members.


Supported by : 국토교통부


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