강섬유로 보강된 초고강도 콘크리트의 일축압축 상태에서의 기계적 특성

초록

Design of fiber reinforced ultra-high strength concrete members should be verified with analytical or experimentalmethods for safety. Members with compressive strength larger than limitation of current design code usually be designed withanalytical verification using stress-strain relation of concrete and reinforcements. For this purpose, mechanical characteristics of steelfiber reinforced ultra-high strength concrete were defined under uniaxial compression. Mix proportions of test specimens were basedon reactive powder concrete and straight steel fibers were mixed with different volume fraction. Compressive strength of matrix weredistributed from 80 MPa to 200 MPa. Effect of fiber inclusion were investigated : increase of compressive strength of concrete,elastic modulus and strain corresponding to peak stress. For the wide range application of investigation, previously tested testspecimens were collected and used for investigation and estimation equation. Based on the investigation and evaluation of previousresearch results and estimation equation of mechanical characteristics of concrete, regression equations were suggested.

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