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윤현도,양일승,한병찬,福山洋,전에스더,문연준 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)
An overview of the response highly ductile hybrid fiber reinforced cementitious composites to bending loading, direct tensile loading, and cyclic loading in both tension and compression is presented. Hybrid fiber reinforced cement composites(HFHCC) contains both of specially processed steel fiber( steel cord) and synthetic fiber. such as. Polyethylene(PE) and Polyvinyl alcohol(PVA). As the result of the bending tests. HFHCC specimen shows multiple cracking in the area subjected to the greatest bending tensile stress. Uniaxial tensile test confirms the range of tensile strain capacity from 0.5 to 1.5% when hybrid fiber is used. The cyclic loading test results identified a unique unloading and reloading response for this ductile composite. Cyclic loading in tension appears not to affect the tensile response of the material if the uniaxial compressive strength during loading is not exceeded.
전에스더,김재환,한병찬,福山洋,김무한,윤현도 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)
In the scope of a larger research project aimed at the development of new fiber reinforced cement composites with improved tensile strength and ductility, numerous single fiber pullout tests from different concrete matrix were performed Fiber debonding and pullout have a large influence on the tensile stress - crack opening behavior of fiber concrete. Both debonding and pullout depend on the quality of the matrix, as well as on the type and quality of the steel fibers, and the applied fiber volume content. In this paper, all fiber pullout tests were carried out using high strength twisted wire strand steel cords. The pullout behavior from plain matrix was studied. The w/c ratio of the mixtures, fiber length, embedded length influence the pullout behavior.
윤현도,양일승,한병찬,福山洋,전에스더,문연준 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)
In this paper, workability, fiber dispersion. compressive strength and splitting strength of hybrid fiber reinforced cement composites(HFHCC) have been investigated by means of Korean Standard (KS). Two type of HFRCC were constructed using fiber combinations of Polyethylene(PE) and steel fibers. Polyvinyl alcohol(PVA) and steel fibers. Test results showed that the fibers, when used in a hybrid form. could result in superior composite performance compared to their individual fiber reinforced cement Composites. Synthetic micro fibers. such as PE and PVA. are effective at imparting fiber dispersion and ductility to the steel fiber (five twisted steel fiber) reinforced cement Composite.