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윤승조 ( Yoon Seong-joe ),임건우 ( Im Geon-woo ),이건철 ( Lee Gun-cheol ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.1
This study evaluated the compressive strength after making mortar with low cement composition for carbon-neutral steam curing to respond to climate change. Blast furnace slag, fly ash, and ultra-high powder fly ash were used as substitutes for cement. The cement substitute was used at 40% of the mass of cement, and after steam curing, the compressive strength was measured on the 1st, 3rd, 7th and 28th days of age. As a result of the experiment, at the age of 1 day, the mixture using only cement showed the highest strength, but from the 3rd day, the specimen using ultra-high powder showed a high strength development rate, followed by blast furnace slag and fly ash.
손상된 철근콘크리트 슬래브에 보강된 하이브리드 모르타르의 휨 보강 효과에 관한 연구
윤승조(Yoon, Seung-Joe),채문기(Chae, Moon-Gi),허승웅(Ho, Seung-Woung) 대한건축학회 2018 대한건축학회 학술발표대회 논문집 Vol.38 No.1
This study conducted an experiment to verify the flexural reinforcement effect based on the state of damage by reinforcing damaged reinforced concrete slabs with hybrid mortar, in order to ascertain the effect of reinforcement construction methods verified to improve the strength of the structure and noise between floors on actual buildings. The method of experiment was conducted based on the “2017 Safety Inspection and Precise Safety Diagnosis Guidelines” of the Korea Infrastructure Safety and Technology Corporation, and the damage on the actual specimen was determination based on the displacement value occurring on the specimen.
하이브리드 모르타르로 보강된 철근콘크리트 슬래브의 두께에 따른 휨 강도에 관한 연구
윤승조(Yoon, Seung-Joe),채문기(Chae, Moon-Gi),이성로(Lee, Seong-Ro),허승웅(Ho, Seung-Woung) 대한건축학회 2018 대한건축학회 학술발표대회 논문집 Vol.38 No.1
This study proposes a construction method reinforcing with hybrid mortar using Ethylene-Vinyl Acetate Copolymer (EVA) used as an environmentally friendly noise reduction material in Korea and other countries, POSS nano complex (Polyhedral OligomericSilses-quioxaneS) and wire mesh. The final form of destruction, performance against force, strength, malleability were evaluated based on the flexural compression, a calculation equation of the slab reinforced with wire mesh and composite mortar was analyzed by comparing the values of the experiment and the values of the calculation equation proposed by existing theses.
하이브리드 콘크리트와 주근간의 부착강도에 관한 실험적 연구
윤승조(Yoon, Seung-Joe),김종빈(Kim, Jong-Bin),이철호(Lee, Chul-Ho),허승웅(Ho, Seung-Woung) 대한건축학회 2018 대한건축학회 학술발표대회 논문집 Vol.38 No.1
This study conducted a bending strength experiment between re-bar and new hybrid concrete mixing POSS (Polyhedral Oligomeric Silses-quioxanes) nano complex on the inside of concrete, and by assembling the inside of each concrete with 3 and 4 main re-bars as an experiment to supplement various problems that occur by the expression of this strength and the distribution of the reinforcement. The number of the main re-bars. and the direction of laying the concrete were applied as the principal variables of the experiment. The experiment results displayed that the hybrid concrete had uniform performance based on the rapid reaction speed of POSS nano complex.
집성재에 표면 매립된 주근과 집성재간의 부착강도에 관한 연구
윤승조(Yoon Seung Joe),허승웅(Ho, Seung Woung),김종빈(Kim, Jong-Bin) 대한건축학회 2016 대한건축학회 학술발표대회 논문집 Vol.36 No.2
A structural timber receives a lot of attention because the demand for green timber houses are growing in Korea. However, the structural timber completely depends on foreign trades and it would be a big disadvantage although it is an outstanding material for construction in that it has good ductility and excellent fire resistance. This study propose Near surface mounted Re-bar into the glued laminated timber for reducing consumption of timbers. Even though the laminated timber is able to conserve wood resources as remnants will be recycled using lamination process after woodworking, there is a difficulty to investigate mechanical properties. This study indicates about bond properties between re-bar and the laminated timber in order to verify basic performance for uniform stiffness by embedding re-bar into renewable collection trees. In addition, 12 models were manufactured to figure out bond strengths between re-bar and the laminated timber affected by failure mode, shape of gutters, bond lengths and diameter of re-bar and then, compared with existing proposed equations. As a result of the study, the bond strength of the serrated model increased by 59 ∼ 62 %. From this result, The process that is embedded with serrated shape in re-bar improve the ability of bond strength between laminated timber and adhesive Also, re-bar strain was getting higher when bond strength became higher so the adhesive used near surface mounted might have a strong influence on the experiment.
전단보강재 형태에 따른 플랫플레이트 슬래브-기둥 내부접합부의 뚫림전단강도 성능 평가
윤승조 ( Yoon Seung-joe ),서수연 ( Seo Soo-yeon ),윤용대 ( Yoon Yong-dae ),이우진 ( Lee Woo-jin ),양충모 ( Yang Chung-mo ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.1
The research manufactured test objects of four types (I, J, SR, C) of shear reinforcement bar in order to verify punching shear behavior at a connecting part between slab and column at a typical office building: seven-story building that is 4.2m high in the first floor and 3.6m high from second to seventh floor. The research experiments punching shear behavior at slab-column connecting part under static forging load to evaluate the shear performance.