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http://dx.doi.org/10.12989/sem.2018.66.4.477

Local bond-slip behavior of medium and high strength fiber reinforced concrete after exposure to high temperatures  

Tang, Chao-Wei (Department of Civil Engineering & Geomatics, Cheng Shiu University)
Publication Information
Structural Engineering and Mechanics / v.66, no.4, 2018 , pp. 477-485 More about this Journal
Abstract
This study aims to investigate the influence of individual and hybrid fiber on the local bond-slip behavior of medium and high strength concrete after exposure to different high temperatures. Tests were conducted on local pullout specimens (150 mm cubes) with a reinforcing bar embedded in the center section. The embedment lengths in the pullout specimens were three times the bar diameter. The parameters investigated include concrete type (control group: ordinary concrete; experimental group: fiber concrete), concrete strength, fiber type and targeted temperature. The test results showed that the ultimate bond stress in the local bond stress versus slip curve of the high strength fiber reinforced concrete was higher than that of the medium strength fiber reinforced concrete. In addition, the use of hybrid combinations of steel fiber and polypropylene fiber can enhance the residual bond strength ratio of high strength concrete.
Keywords
hybrid fiber reinforced concrete; residual bond strength; pullout test;
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Times Cited By KSCI : 5  (Citation Analysis)
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