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General Information
Editor-in-chief
Prof. T. Hikmet Karakoc
Anadolu University, Faculty of Aeronautics and Astronautics, Turkey

IJET 2015 Vol.7(6): 470-473 ISSN: 1793-8236
DOI: 10.7763/IJET.2015.V7.839

Fiber Orientation Factor on Rectangular Cross-Section in Concrete Members

Seong-Cheol Lee, Jeong-Hwan Oh, and Jae-Yeol Cho
Abstract—In order to predict the post-cracking tensile behavior of fiber reinforced concrete, it is necessary to evaluate the fiber orientation factor which indicates the number of fibers bridging a crack. For investigation of fiber orientation factor on a rectangular section, in this paper, dog-bone fiber reinforced concrete specimens were prepared with the variables of concrete compressive strength, rectangular cross-section size, fiber type, and fiber volumetric ratio. After direct tension tests, the fiber orientation factor could be evaluated through counting the number of fibers on a crack. From the test results, it was investigated that the fiber orientation factor was larger than 0.5 which is generally adopted for large members, as fibers distribution is affected by the specimen size. For rational prediction of the fiber orientation factor on a rectangular concrete section, a simple model was derived from the Diverse Embedment Model (DEM), which is a rigorous model to predict the tensile behavior of steel fiber reinforced concrete. From the comparison of the measured data and the predicted values, it was found that the actual fiber orientation factor was well predicted by the proposed model.

Index Terms—Fiber orientation factor, fiber reinforced concrete, rectangular cross-section, steel fiber.

S. C. Lee is with KEPCO Nuclear Graduate School, Ulsan, South Korea (e-mail: sclee@kings.ac.kr).
J. H. Oh is with the Office of Offshore Windpower Promotion, KETEP, and Seoul in South Korea (e-mail: ffjung45@gmail.com).
J. Y. Cho is with the Dept. of Civil and Environmental Engineering, Seoul National University, Seoul, South Korea (e-mail: jycho@snu.ac.kr).

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Cite: Seong-Cheol Lee, Jeong-Hwan Oh, and Jae-Yeol Cho, "Fiber Orientation Factor on Rectangular Cross-Section in Concrete Members," International Journal of Engineering and Technology vol. 7, no. 6, pp. 470-473, 2015.

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