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Measurement of Transfer Length for a Seven-Wire Strand with FBG Sensors
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 Title & Authors
Measurement of Transfer Length for a Seven-Wire Strand with FBG Sensors
Lee, Seong-Cheol; Choi, Song-Yi; Shin, Kyung-Joon; Kim, Jae-Min; Lee, Hwan-Woo;
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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 . 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.
smart tendon;FBG sensor;pretension;transfer length;
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