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Title |
Characteristic Strength and Deformation of SFRC Considering Steel Fiber Factor and Volume Fraction
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Keywords |
강섬유 ; 전단 보강 ; 강섬유 계수 ; 혼입률 ; 할렬인장강도 steel fiber ; shear strength ; steel fiber factor ; volume fraction ; tensile splitting strength |
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Abstract |
The addition of steel fiber with concrete significantly improves the engineering properties of structural members, notably shear strength. The purpose of this study is to determine the steel fiber shape, aspect ratio and volume fraction ratio in a point of practical usage as structural members. Steel fiber factor and volume fraction are also considered to verify the strengthening effect in member level. From the reviewing of previous researches and analyzing of consecutive material test results, the optimum shape and length of steel fiber, which can have a good strengthening effects were defined as a hooked end type and larger than 1.5 times of maximum gravel size. Analyzing the test results of strength and deformation capacity, aspect ratio 75 and volume fraction 1.5% can be having a maximum strengthening effect of steel fiber. Also steel fiber factor, tensile splitting strength, and flexural strength are found as key parameter in shear strengthening effect in member level.
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