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Mechanical Behavior of Plain and Steel Fiber Reinforced High Strengh Concrete Under Biaxial Compression
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 Title & Authors
Mechanical Behavior of Plain and Steel Fiber Reinforced High Strengh Concrete Under Biaxial Compression
Lim Dong-Hwan;
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The purpose of this study is to investigate the mechanical characteristics of plain and steel fiber high strength concrete under uniaxial and biaxial loading condition. A number of plain and steel fiber high strength concrete cubes having 28 days compression strength of 82.7MPa(12,000 psi) were made and tested. Four principal compression stress ratios (=0.00, 050, 0.75 and 1.00), and four fiber concentrations( =0.0, 0.5, 1.0 and ) were selected as major test variables. From test results, it is shown that confinement stress in minor stress direction has pronounced effect on the strength and deformational behavior. Both of the stiffness and ultimate strength of the plain and fiber high strength concrete Increased. The maximum increase of ultimate strength occurred at biaxial stress ratio of 0.5() in the plain high strength concrete and the value were recorded over than the strength under uniaxial condition. The failure modes of plain high strength concrete under uniaxial compression were shown as splitting type of failure but steel fiber concrete specimens under biaxial condition showed shear type failure. The values of elastic modulus were also examined higher than that from ACI and CEB expression under biaxial compression condition.
high strength concrete;fiber reinforced high-strength concrete;stress-strain relation;failure modes;elastic modulus;
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