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반복하중을 받는 철근콘크리트 보의 헌치 및 슬래브 유무에 따른 구조성능 평가
신종학(Shin Jong-Hak),하기주(Ha Gee-Joo),이재근(Lee Jae-gun),홍건호(Hong Kun-Ho),강현욱(Kang Hyun-Wook),이동근(Lee Dong-Gun) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
In this stydy, experimental research was carried out the hysteretic behavior of reinforced concrete haunched beams such as application with or without haunched and slab, and shear reinforced ratio. Test results showed that test specimens(FTG-i-1 Series, FTH-i-1 Series) was increased respectively the maximum load carrying capacity by positive 11%, negative 25% and the energy dissipation capacity by positive 1.08~1.78, negative 1.12~1.74 times in comparison with the standard specimens(FTG-0-1, FTH-0-1). And the specimens(FTG-i-1 Series, FTH-i-1 Series) showed stable hysteresis behavior.
박정원(Chung Won Park),신종학(Jong Hak Shin),이갑숙(Kab Sook Lee) 한국환경생물학회 1999 환경생물 : 환경생물학회지 Vol.17 No.1
The dynamics of phytoplankton community in Lake Imha and its tributaries was ivestigated at nineteen stations in August and September 1996. A total of 171 taxa [171 species(including 1 forms and 27 varieties), 66 genus, 25 families, 6 suborders, 13 orders and 6 class] were identified. The standing crops of phytoplankton ranged from 47.35×10 exp (3) to 184.65×10 exp (3) individuals/ml in surface layer, 1.08×10 exp (3)∼54.33×10 exp (3) individuals/ml in middle layer and 0.69×10 exp (3)∼115.85×10 exp (3) individuals/ml in low layer. Dominant species determined by standing crops of each species were Oocystis lacustris, Elakatothrix gelatinosa, Aulacoseira ambigua and Synedra acus, however, the most species dominated from 1992 to 1994 disappeared.
매입형 탄소섬유봉과 보강철물을 이용한 철근콘크리트 보의 구조성능 평가
하기주(Ha Gee-Joo),신종학(Shin Jong-Hak),하영주(Ha Young-Joo),홍건호(Hong Kun-Ho),강현욱(Kang Hyun-Wook) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
In this study, experimental research was carried out to evaluate the structural performance of reinforced concrete beam using embedded carbon fiber bars and strengthening metal fittings in existing reinforced concrete building Test results showed that retrofitting specimens with embedded carbon fiber bars were increased the load-carrying capacity by 21~55%, retrofitting specimens with embedded carbon fiber bars and strengthening metal fittings were increased the load-carrying capacity by 21~48% in comparison with the standard specimen. Also, retrofitting specimens showed much higher ductility compared to retrofitting specimens with conventional method.
고로슬래그미분말과 PVA섬유를 활용한 철근콘크리트 보의 구조성능평가
하기주(Ha Gee-Joo),신종학(Shin Jong-Hak),이동렬(Yi Dong-Ryul),홍건호(Hong Kun-Ho),하재훈(Ha Jae-Hoon),강현욱(Kang Hyun-Wook) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
Four reinforced concrete beam using ground granulated blast furnace slag were constructed and tested under monotonic loading. Experimental programs were carried out to evaluate the structural performance of such test specimens, such as the failure mode, the maximum strength, and crack control. All the specimens were modeled in one-fourth scale size. Test result shows that specimens designed by the improving of structural performance using the ground granulated blast furnace slog(BSHF series) were attained significantly cracking control due to the fiber bridging and increased the load carrying capacity by 47% in comparison with the standard specimen(BSS).