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http://dx.doi.org/10.4334/JKCI.2007.19.6.735

Ultimate Stress of Prestressing CFRP Tendons in PSC Beams Strengthened by External CFRP Prestressing  

Park, Sang-Yeol (Dept. of Civil and Environment Engineering, Cheju National University)
Kim, Chang-Hoon (Dept. of Civil and Ocean Engineering, Cheju National University)
Hong, Seong-Yong (Dept. of Civil and Ocean Engineering, Cheju National University)
Publication Information
Journal of the Korea Concrete Institute / v.19, no.6, 2007 , pp. 735-744 More about this Journal
Abstract
This study deals with literature review, developing a predicting equation for the ultimate stress of prestressing (PS) CFRP, and experimental test with the parameters affecting the ultimate stress of prestressing CFRF in prestressed concrete beams strengthened by external prestressing. The ACI (American Concrete Institute) predicting equation for the ultimate stress of unbonded prestressing CFRP is analyzed to develop a new integrated predicting equation. The proposed predicting equation takes rationally the effect of internal PS steel into consideration as a function of prestressing tendon depth to neutral depth ratio. In the experimental study, prestressed concrete beams strengthened using external prestressing CFRP are tested with the test parameters having a large effect on the ultimate stress of prestressing CFRP. The test parameters includes infernal prestressing steel and external prestressing CFRP tendon reinforcement ratios, and span to depth ratio. The test results are analyzed to confirm the rationality and applicability of the proposed equation for predicting the ultimate stress of external prestressing CFRP.
Keywords
external prestressing; ultimate stress; CFRP tendon; predicting equation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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