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

FBG 센서를 이용한 강연선 전달길이 측정

Lee, Seong-Cheol;Choi, Song-Yi;Shin, Kyung-Joon;Kim, Jae-Min;Lee, Hwan-Woo
이성철;최송이;신경준;김재민;이환우

  • Received : 2015.10.26
  • Accepted : 2015.11.25
  • Published : 2015.12.29

Abstract

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.

Keywords

smart tendon;FBG sensor;pretension;transfer length

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Cited by

  1. Construction Condition and Damage Monitoring of Post-Tensioned PSC Girders Using Embedded Sensors vol.17, pp.8, 2017, https://doi.org/10.3390/s17081843
  2. Damage Detection with FBG Sensors for Pre-Stress Concrete Girders vol.737, pp.1662-9795, 2017, https://doi.org/10.4028/www.scientific.net/KEM.737.454
  3. Fundamental Experiment to Verify the Resolution of Hetero-core Fiber Optic Sensor for the Prestress Measurement vol.31, pp.5, 2018, https://doi.org/10.7734/COSEIK.2018.31.5.259

Acknowledgement

Supported by : 국토교통부