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공동주택 철근공사의 현장분석을 통한 생산성에 관한 연구
하기주 ( Gee Joo Ha ),최민권 ( Min Kwon Choi ),이동렬 ( Dong Ryul Yi ),하영주 ( Young Joo Ha ),하민수 ( Min Su Ha ),하재훈 ( Jae Hoon Ha ) 한국건축시공학회 2010 한국건축시공학회 학술발표대회 논문집 Vol.10 No.1
In this study, it was accomplished to analyze the productivity and manpower through the activity of rebar work for the application of rational construction cost in apartment house. And the rebar work is very important in the view of the expense and safety, and durability in the construction of R/C structure. Also the rebar work is very affected with productivity owing to the lack of manpower and materials cost rise.
PP섬유 및 강섬유를 혼입한 내화패널을 부착한 고강도 철근콘크리트 부재의 내화성능 평가 및 개선
하기주(Ha, Gee-Joo),이동렬(Yi, Dong-Ryul),하재훈(Ha, Jae-Hoon),강현욱(Kang, Hyun-Wook),백승렬(Paek, Seung-Ryul) 대한건축학회 2020 대한건축학회논문집 Vol.36 No.12
In this study, the fire resistant panels using blast furnace slag and fiber(pp, steel, hybrid) was constructed and tested to prevent the spalling of high strength concrete. Structural performance of reinforced concrete beams with fire resistant panel was evaluated such as load-displacement, failure mode, maximum load carrying capacity, and ductility, after exposure to fire test. In Specimen BSS-F, maximum load carrying capacity was decreased by 21% in comparison with specimen BSS. It was also happened shear failure at the final tests. Test results showed that Specimen BSBPP-F series, BSBS-F series, and BSBPS-F series was increased the maximum load carrying capacity by 10~28% and the ductility capacity by 59~363% respectively in comparison with the Specimen BSS-F. Specimen with the fire resistant panel showed stable behavior and it was found that maximum load carrying capacity was increased.
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).
고로슬래그 미분말 및 순환잔골재를 적용한 PVA섬유 보강 철근콘크리트 보의 구조성능 평가
하기주(Ha, Gee-Joo),이동렬(Yi, Dong-Ryul),하재훈(Ha, Jae-Hoon) 대한건축학회 2018 大韓建築學會論文集 : 構造系 Vol.34 No.8
In this study, total nine R/C beams, designed by the PVA Fiber with ground granulated blast furnace slag and recycled fine aggregate were constructed and tested under monotonic loading. In the material development, micromechanics was adopted to properly select the optimized range of the composite based on steady-state cracking theory and experimental studies on the matrix and interracial properties. Experimental programs were carried out to improve and evaluate the structural performance of the test specimens: the load-displacement, the failure mode, the maximum strength, and ductility capacity were assessed. Test results showed that test specimens (BSPR-20, 40) was increased the maximum load carrying capacity by 3~6% and the ductility capacity by 9~14% in comparison with the standard specimen (BSS). And the specimens (BSPR-60, 80, 100) was decreased the maximum load carrying capacity by 0~4% and the ductility capacity by 79% in comparison with the standard specimen (BSS) respectively.
고로슬래그 미분말 및 섬유를 혼입한 내화패널 적용 철근콘크리트 부재의 구조성능 평가
하기주(Ha, Gee-Joo),이동렬(Yi, Dong-Ryul),하영주(Ha, Young-Joo),하재훈(Ha, Jae-Hoon) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.2
In this study, to prevent the spalling of high strength concrete, the fire resistance panels was constructed using blast furnace slag and fiber. And the structural performance of reinforced concrete members was conducted after a fire test on the fire resistance panels. Ten reinforced concrete members using high strength concrete were constructed and tested under monotonic loading. Experimental programs were carried out to improve and evaluate the structural performance of the test specimens: the load-displacement, the failure mode, and the maximum strength were assessed. As a result of the test, The specimen BSS-F that did not use the fire resistance panel had decreased load-carrying capacity. And the specimen showed the shear failure. However, the specimen with the fire resistance panel showed stable behavior and it has decrease the loss of load-carrying capacity of reinforced concrete members.