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http://dx.doi.org/10.4334/JKCI.2009.21.1.065

Splice Length of GFRP Rebars Based on Flexural Tests of Unconfined RC Members  

Choi, Dong-Uk (Dept. of Architectural Engineering, Hankyong National University)
Chun, Sung-Chul (Daewoo Institute of Construction Technology)
Ha, Sang-Su (Center for Construction Engineering Research, Hankyong National University)
Publication Information
Journal of the Korea Concrete Institute / v.21, no.1, 2009 , pp. 65-74 More about this Journal
Abstract
Glass fiber reinforced polymer (GFRP) bars are sometimes used when corrosion of conventional reinforcing steel bar is of concern. In this study, a total of 36 beams and one-way slabs reinforced using GFRP bars were tested in flexure. Four different GFRP bars of 13 mm diameter were used in the test program. In most test specimens, the GFRP bars were lap spliced at center. All beams and slabs were tested under 4-point loads so that the spliced region be subject to constant moment. Test variables were splice lengths, cover thicknesses, and bar spacings. No stirrups were used in the spliced region so that the tests result in conservative bond strengths. Average bond stresses that develop between GFRP bars and concrete were determined through nonlinear analysis of the cross-sections. An average bond stress prediction equation was derived utilizing two-variable linear regression. A splice length equation based on 5% fractile concept was then developed. As a result of this study, a rational equation with which design splice lengths of the GFRP bars can be determined, was proposed.
Keywords
GFRP bar; bond; lap splice; bar spacing; development;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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