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A platform for research: civil engineering, architecture and urbanism
Model of Hooked Steel Fibers Reinforced Concrete under Tension
Abstract The main objective of this research was to develop a model for predicting stress-strain relationship of hooked steel fibers reinforced concrete (HF-FRC) under tension. The research was divided into 2 parts. The first part was extensive tensile tests of HS-FRC. The hooked steel fibers having two plastic hinges at both ends were used. The size of tensile specimens was 5 x 5 cm in cross section and 50 cm in length. Parameters used in the study were: (a) L f /D and L f of the fibers (65/60, 65/35 and 80/60); (b) volume fractions of the fibers (0, 0.25, 0.5, 1.0 and 1.5%); and (c) compressive strength of concrete (30, 40 and 50 MPa). The main results obtained in test were stress-strain relationship of HS-FRC, first-peak strength, and post-cracking strength. The second part focused on statistical prediction. The basic model of stress-strain relationship was proposed in this research, i.e. linear relationship up to first-peak strength and assumed constant post-cracking strength. In statistical prediction, the dependent variables were first-peak strength and post-cracking strength of HF-FRC, while the independent variable were L f /D, L f , volume fraction of fibers, and compressive strength of concrete. A good prediction was obtained from the model, and the equations for using in the design were recommended. It was seen in the model that an increase in L f /D ratio, L f , volume fraction of the fibers, and compressive strength of concrete significantly enhanced the tensile performance of hooked steel fiber reinforced concrete, and could lead to high performance fiber reinforced concrete.
Model of Hooked Steel Fibers Reinforced Concrete under Tension
Abstract The main objective of this research was to develop a model for predicting stress-strain relationship of hooked steel fibers reinforced concrete (HF-FRC) under tension. The research was divided into 2 parts. The first part was extensive tensile tests of HS-FRC. The hooked steel fibers having two plastic hinges at both ends were used. The size of tensile specimens was 5 x 5 cm in cross section and 50 cm in length. Parameters used in the study were: (a) L f /D and L f of the fibers (65/60, 65/35 and 80/60); (b) volume fractions of the fibers (0, 0.25, 0.5, 1.0 and 1.5%); and (c) compressive strength of concrete (30, 40 and 50 MPa). The main results obtained in test were stress-strain relationship of HS-FRC, first-peak strength, and post-cracking strength. The second part focused on statistical prediction. The basic model of stress-strain relationship was proposed in this research, i.e. linear relationship up to first-peak strength and assumed constant post-cracking strength. In statistical prediction, the dependent variables were first-peak strength and post-cracking strength of HF-FRC, while the independent variable were L f /D, L f , volume fraction of fibers, and compressive strength of concrete. A good prediction was obtained from the model, and the equations for using in the design were recommended. It was seen in the model that an increase in L f /D ratio, L f , volume fraction of the fibers, and compressive strength of concrete significantly enhanced the tensile performance of hooked steel fiber reinforced concrete, and could lead to high performance fiber reinforced concrete.
Model of Hooked Steel Fibers Reinforced Concrete under Tension
Sujivorakul, C. (author)
2012-01-01
8 pages
Article/Chapter (Book)
Electronic Resource
English
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