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Title |
An Experimental Study on Transfer Length of Domestic CFRP Tendon
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Keywords |
탄소섬유복합재 ; 긴장재 ; 전달길이 ; 정착길이 carbon fiber reinforced polymer ; prestressing tendon ; transfer length ; development length |
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Abstract |
CFRP(carbon fiber reinforced polymer) tendons can be used as an alternative to solve the corrosion problem of steel tendons. Material properties of CFRP tendons such as bond strength, transfer length, and development length should be determined in order to apply to concrete structures. First of all, in case of application for pretension concrete members with CFRP tendons, transfer length is an important factor. A total of 9 beams have been cast to determine transfer length and development length of domestic CFRP tendon in this paper. Test results revealed that transfer length of the prestressing 25% and 50% are 34D, 55D respectively. Also, transfer length has increased as the prestressing force has increased. A change was observed in transfer length of developed CFRP tendon after 9 weeks. αt of developed CFRP tendon was 2.3 similar to the steel strand.
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