초고성능 콘크리트의 압축시 응력 변형률 관계의 특성 분석에 관한 실험적 연구

초록

In order to design the concrete members with ultra high performance concrete reinforced with steel fiber should be tested and analyzed with appropriated approaches that was approved by design provisions. The most important thing is stress-strain relation of tested material that was different with normal strength concrete which usually be used in construction site. In this study, concrete with compressive strength larger than limitation of current code provisions was tested for the additional study for the usage of ultra high strength concrete. The main variable is compressive strength of concrete, 80 MPa, 100 MPa, 150 MPa and 200 MPa. The second variable is volume fraction of steel fiber, 0%, 0.5%, 1% and 2%. From the stress-strain relation acquired from compression test, strain at ultimate strength of ultra high performance concrete is about two times larger than normal strength concrete. Steel fiber reduced the abrupt failure in 80 MPa test specimen but for larger compressive strength, it is hard to reduce the abrupt failure aspect.