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http://dx.doi.org/10.14190/JRCR.2018.6.4.349

Modeling of Material Properties of Fiber-Reinforced High Strength Concrete  

Yang, In-Hwan (Department of Civil Engineering, Kunsan National University)
Park, Ji-Hun (Department of Civil Engineering, Kunsan National University)
Choe, Jeong-Seon (Department of Civil Engineering, Kunsan National University)
Joh, Changbin (Structural Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.6, no.4, 2018 , pp. 349-356 More about this Journal
Abstract
In this study, material properties of steel fiber reinforced high strength concrete (FRHSC) with the compressive strength of about 120MPa were modeled. Steel fiber content of 1.0%, 1.5%, and 2.0% was considered as experimental variable. First of all, compressive strength tests were carried out to determine compressive characteristics of concrete, and compressive stress-strain curves were modeled. For conventional concrete with moderate compressive strength, the stress-strain curves are in the form of parabolic curves, but in the case of high strength concrete reinforced with steel fiber, the curves increase linearly in the form of the straight line. In addition, to understand the tensile properties of FRHSC, the crack mouth opening displacement (CMOD) test was performed, and the tensile stress-CMOD curve was calculated through inverse analysis. When the steel fiber content increased from 1.0% to 1.5%, there was a significant difference of tensile strength. However, when the amount of steel fiber was increased from 1.5% to 2.0%, there was no significant difference of tensile strength, which might result from the poor dispersion and arrangement of steel fiber in concrete.
Keywords
Material properties; Steel fiber; Compressive strength; Tensile strength; Crack mouth opening displacement;
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