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방성준 ( Sung-jun Pang ),안경선 ( Kyung-sun Ahn ),박금성 ( Keum-sung Park ),김현수 ( Hyun Soo Kim ),오정권 ( Jung-kwon Oh ) 한국목재공학회 2020 한국목재공학회 학술발표논문집 Vol.2020 No.1
In this study, the shear capacity of notch connection was investigated to design the CLT-concrete composite floor. The notch connection was composed of cross-laminated timber (CLT) and eco-concrete. Two types of the notch connection with different diameters were manufactured to evaluate the shear capacity according to the area of the notch. The size of CLT was 300 mm × 400 mm, and a 20 mm deep hole (∅100 mm or ∅200 mm) was drilled in the center of the surface. Eco-concrete was poured on the CLT with a thickness of 50 mm. The planar shear test was conducted with an inclination of 11.6 degrees, and the load rate was 2 mm/min. As a result, shear failure of concrete occurred for ∅100 mm notch connection. The load resistance was 16.5 kN (lower 5<sup>th</sup> percentile value) and the slip modulus was 50.8 kN/mm (mean value). In case of ∅100 mm notch connection, shear block failure of CLT occurred. The load resistance was 59.6 kN (lower 5<sup>th</sup> percentile value) and the slip modulus was 75.7 kN/mm (mean value).
< 전시-P-28 > 생태건축자재로서 구조용 CLT 인증과 설계기법
방성준 ( Sung-jun Pang ),이현정 ( Hyeon-jeong Lee ),박금성 ( Keum-sung Park ),김현수 ( Hyun Soo Kim ),오정권 ( Jung-kwon Oh ) 한국목재공학회 2019 한국목재공학회 학술발표논문집 Vol.2019 No.1
Ecological architecture uses sustainable building materials that minimize the impact on ecosystems. Various architectural cases from the single-storey house to 24-storey building have been constructed using cross-laminated timber (CLT) in the world. Several domestic CLTs have been developed and the structural characteristics were evaluated. This study introduces the certification criteria and process of ecological materials based on environmental product declaration (EPD). The CLT design methods including design formula, adjustment factors, and fire resistance calculations were also reviewed based on overseas CLT design methods.
방성준 ( Sung-jun Pang ),안경선 ( Kyung-sun Ahn ),김지용 ( Ji-yong Kim ),김민정 ( Min-jeong Kim ),김현수 ( Hyun Soo Kim ),김철기 ( Chul-ki Kim ),장상식 ( Sang Sik Jang ),이형우 ( Hyoung Woo Lee ),이덕용 ( Deok Yong Lee ),오정권 ( 한국목재공학회 2021 한국목재공학회 학술발표논문집 Vol.2021 No.2
In this study, a new shear wall system consisted of panelized wall units was developed. The panelized wall unit consisted of wood fiber insulation, vacuum insulation, structural timber, plywood, and nails. Three types of shear walls (Set 1 _ single unit, Set 2 _ two units connected with plywood and nails, Set 3 _ two units connected by screw-pressed gluing with plywood) were prefabricated and the shear performance was evaluated. The size of the shear wall was 1.2m×2.4m for Set 1 and 2.4m×2.4m for Set 2 and Set 3. Five specimens for each shear wall were prepared and cyclic load tests were carried out according to ISO 16670 standard. In all specimens, tensile failure of the plywood and studs at the top of the hold-down occurred. The maximum shear strength of Set 1 was 47.2 kN/m and that for Set 2 and Set 3 was 51.0 kN/m and 52.9 kN/m, respectively.
방성준(Pang, Sung-Jun),김성태(Kim, Sung-Tae),이전제(Lee, Jun-Jae),이상준(Lee, Sang-Joon),오정권(Oh, Jung-Kwon) 대한건축학회 2016 대한건축학회 학술발표대회 논문집 Vol.36 No.2
The aim of this study was to develop and commercialize a wood reinforced earth retaining wall system using domestic wood. Structural safety and service life of domestic treated wood were investigated. A connection between wood member and grid was developed and the structural safety of the connection was simulated and checked. The slope stability of the ground was also checked and the simulation result was satisfied. The developed retaining wall system was constructed and the economic efficiency through the construction was analyzed. The results show that the developed retaining wall system was approximately 30% economical than the conventional gravity retaining wall system.
방성준 ( Sung-jun Pang ),안경선 ( Kyung-sun Ahn ),김지용 ( Ji-yong Kim ),오재원 ( Jae-won Oh ),오정권 ( Jung-kwon Oh ) 한국목재공학회 2022 한국목재공학회 학술발표논문집 Vol.2022 No.1
In this study, a glued-laminated timber (GLT) was reinforced with a steel plate and inclined screws, and its bending performance was analyzed. In a total of 8 GLTs, 3 GLTs were not reinforced (control group) and 5 GLTs were reinforced with steel plates (comparison group). The size of GLT was 80 mm (width) × 120 mm (thickness) × 2400 mm (length). The GLT in the comparison group, a steel plate (SPHC-P, yield strength: 227 MPa, modulus of elasticity 166.33 GPa) was installed with screws (∅9x160mm, 45°). The deflection and load of specimens were measured by a third-point bending test to derive their bending stiffness and load-carrying capacities. As a result of the experiment, all specimens in the control group showed brittle tensile failure, but all specimens of the comparison group showed ductile behavior and maintained a load-bearing capacity of about 30 kN. After the compression failure of the GLT, there was no damage to the screw connection while the steel plate was extended. Therefore, the screw connection sufficiently supported the shear force generated between GLT and steel plate, and the steel plate reinforcement completely changed the GLT behavior.
방성준(Pang Sung-Jun),박주생(Park Joo-Saeng),박천영(Park Chun-Young),이전제(Lee Jun-Jae) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
Most of the Korean traditional architectures are made of wood. The post-beam joint is wood-to-wood connection and the joint performance is very important to structural analysis. Until recently, however, the structural performance of traditional post-beam joint has not been adequately analyzed. This study was aimed to evaluate the influence of shape of a beam on moment-carrying capacity of traditional post-beam joint. Japanese larch(Larix kaempferi) 6-ply glulam was manufactured by pre-cut machine for the specimens. Moment resistance, joint stiffness, and failure mode were investigated under static bending forces. Results of the tests indicated that a post-beam joint becomes stiffer as shoulder of a beam is increased. The results also indicated that all types of the joints undergo very large deformation while maintaining same moment resistance after yield point. The failure modes are different as the shape of a beam, which are either splitting of post or shear and bending failure at the mortise branches. The moment resistance and the failure mode indicated that the shape of a beam substantially affects the performance of the joint. It was concluded that the shoulder of a beam reinforce the joint. Hence, the shoulder of a beam must be considered as important factor in structural design of traditional joints.