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봉강섬유 및 잔골재 종류에 따른 HPFRCC의 역학적 특성에 관한 실험적 연구
변장배(Byun Jang-bae),전에스더(Jeon Esther),김용철(Kim Yong-Cheol),윤현도(Yun Hyun-Do) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.2
High performance fiber-reinforced cementitious composite(HPFRCC) encompass a wide variety of cementitious composites whose behavior in tension is significantly more ductile than that of reinforced concrete. Fibers in HPFRCC are increasingly being used for the reinforcement of cementitious matrix to enhance the toughness and energy absorption capacity and to reduce the cracking sensitivity of the matrix. HPFRCC for structural applications has been developed under the performance driven design approach. It is the aim of this study to obtain development of HPFRCC using polyvinyl -alcohol fiber(PVA) and polyethylene(PE). The results of this study, specimens of series Ⅰ with silica-powder showed a higher strength than series Ⅱ with natural-fine aggregates. It was targeted a requirement of a performance test and apply to structure member.
중심 축력을 받는 콘크리트 기둥에서 섬유혼입조건에 따른 압축거동특성
변장배 ( Byun Jang-bae ),전에스더 ( Jeon Estherhong ),윤현도 ( Yun Hyun-do ),황선경 ( Hwang Sun-kyung ),김창교 ( Kim Chang-kyo ),김선우 ( Kim Sun-woo ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.2
This paper showed to aid in the evaluation of FRCC columns with PVA fibers and SC. An experimental investigation on the strength and behavior of FRCC column using SC and PVA fibers have been carried out. The columns were subjected to monotonic axial compression until failure. The variables in this study are the combination ratio of SC and PVA, and the fiber volumetric ratio of SC and PVA. Test results showed that the fibers, when used in a hybrid form, could result in superior composite performance compared to their individual fiber simple system cement composites. Also, the result showed that FRCC is able to control ductility behavior of columns.
대각보강된 프리캐스트 HPFRCC 커플링 보의 비선형 해석
변장배(Byun Jang-Bae),이민정(Lee Min-Jeong),김선우(Kim Sun-Woo),박완신(Park Wan-Shin),윤현도(Yun Hyun-Do) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
HPFRCC have recently been proposed as an alternative to concrete in coupling beams between shear walls. Ordinary reinforced concrete coupling beams for shear walls require heavy reinforcing details to provide stable behavior under seismic loading. The use of HPFRCC has been proposed in order to reduce the level of reinforcing required while maintaining or even improving strength, ductility and energy dissipation, in addition to improving damage tolerance. The purpose of this study is to assess the validity of modeling techniques for simulating the cyclic behavior of these HPFRCC coupling beams. Presented in this paper are results from nonlinear finite element analyses performed on two of the specimens containing diagonal reinforcing. In the finite element model, the mode of failure wasthe same, with opening of the main diagonal crack following compression failure of the concrete and HPFRCC. Also, The specimens was performed and showed that for shear controlled coupling beams, the pseudo-strain hardening behavior of HPFRCC materials can lead to large increases in strength before shear failure occurs.
중심 축력을 받는 콘크리트 기둥에서 섬유혼입조건에 따른 압축거동특성
변장배(Byun Jang-bae),전에스더(Jeon EstherHong),윤현도(Yun Hyun-Do),황선경(Hwang Sun-Kyung),김창교(Kim Chang-Kyo),김선우(Kim Sun-Woo) 한국구조물진단유지관리학회 2005 한국구조물진단학회 학술발표회논문집 Vol.9 No.2
This paper showed to aid in the evaluation of FRCC columns with PVA fibers and Sc. An experimental investigation on the strength and behavior of FRCC column using SC and PVA fibers have been carried out. The columns were subjected to monotonic axial compression until failure. The variables in this study are the combination ratio of SC and PVA, and the fiber volumetric ratio of SC and PVA. Test results showed that the fibers, when used in a hybrid form, could result in superior composite performance compared to their individual fiber simple system cement composites. Also, the result showed that FRCC is able to control ductility behavior of columns.
혼화재 종류 및 혼입률에 따른 HPHFRC의 배합 성능에 관한 연구
변장배(Byun Jang-bae),이원석(Lee Won Suk),전에스더(Jeon Esther),김선우(Kim Sun-Woo),윤현도(Yun Hyun-Do) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.1
In the present work, high performance fiber reinforced cement composite(HPFRCC) with singleness fiber are characterized though the control of crack. But the hybrid system of high performance hybrid fiber reinforced concrete(HPHFRC) has the most effect than the single system of HPFRCC, and demonstrate the superiority of hybrid system by experiments. HPHFRC is promotion for strength and performance, but reduce to lower workability and mobility. Hence, this study is make an investigation into softening and hardening condition of HPHFRC with polypropylene(PP) and polyethylene(PE) fiber on the kinds and contents of a compounds. The results, the kinds and contents of a compounds is a matter of consequence that mixing determination of HPHFRC.
보강섬유 및 잔골재 종류에 따른 HPFRCC의 역학적 특성에 관한 실험적 연구
변장배 ( Byun Jang-bae ),전에스더 ( Jeon Esther ),김용철 ( Kim Yong-cheol ),윤현도 ( Yun Hyun-do ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.2
High performance fiber-reinforced cementitious composite(HPFRCC) encompass a wide variety of cementitious composites whose behavior in tension is significantly more ductile than that of reinforced concrete. Fibers in HPFRCC are increasingly being used for the reinforcement of cementitious matrix to enhance the toughness and energy absorption capacity and to reduce the cracking sensitivity of the matrix. HPFRCC for structural applications has been developed under the performance driven design approach. It is the aim of this study to obtain development of HPFRCC using polyvinyl-alcohol fiber(PVA) and polyethylene(PE). The results of this study, specimens of series I with silica-powder showed a higher strength than series E with natural-fine aggregates. It was targeted a requirement of a performance test and apply to structure member.