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전통목구조 기둥-창방 접합부 인장내력과 파괴모드에 관한 연구
황종국(Hwang Jong-Kook),홍성걸(Hong Sung-Gul) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.11
In this research the resisting capacity and fracture mode of column-connecting beam joint which is very important to stabilize traditional wooden structure is evaluated. To estimate the resisting capacity of joint, a half model is designed and tension test is performed. The types of joint test models are classified as nine types by Research report for the construction standard of traditional wooden structure. The tension tests are performed in state that the different types of vertical load, 0kN, 10.35kN, 20.23kN act on column to analysis the effect of vertical loads. These tests enabled us to investigate relationship between deformation and resultants with fracture modes at ultimate. Column-connecting beam joints of half scale models in tension forces in were applied by hydraulic actuators attached at the end of lintel and controlled by displacement. The speed of hydraulic actuator was kept as 0.5㎜/sec. The degree of tension stiffness based on the load-displacement relationship curve showed the efficiency of components involved in force transfers and their post yield behavior. In test result, the Utguli-Sanji connection showed the largest resisting capacity on time that vertical load didn't act on column. The Jumukjang connection showed the largest resisting capacity except Utguli-Sanji connection.
전통목조 주먹장 접합부 해석을 위한 비선형 3D 유한요소 모델
황종국(Hwang, Jong-Kook) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.11
This paper was performed to present material model and finite element analysis method applied yield criteria in numerical analysis of traditional wooden joint using 3D non-linear and orthotropic material. Wood was considered as orthotropic non-linear elasto-plastic material. It was used Hill’s yield criterion, a generalized version of von Mises yield criterion, to decide orthotropic yield criteria. Uniaxial compression and shear tests were performed to determine the coefficient of stiffness matrix. Numerical analysis for the uniaxial tensile loading of dovetail joint was simulated by using Abaqus-explicit 6.10 and slopes of force-displacement curve were compared with experimental results to verify the accuracy of numerical analysis.
전통목구조 중깃 사용벽체의 면외방향 한계변형에 관한 연구
황종국(Hwang, Jong-Kook),권양희(Kwon, Yang-Hee) 대한건축학회 2020 대한건축학회논문집 Vol.36 No.9
A study was conducted to determine the limit drift ratio of a traditional wooden structure wall. One of the national treasure traditional wooden buildings, the deformation is proceeding from the right side wall of Muyangsujeon to the out-of-plane direction. By this reason, the limit drift ratio was determined by selecting the wall of Muyangsujeon as an example of this study. Although there is a limitation that the Muyangsujeon wall does not mean all walls of the traditional wooden structures, the purpose was to provide basic data to choice a reasonable determination in the case of a Traditional Wall constructed in a similar way to the Muyangsujeon wall. In the case of historical buildings, it is often difficult to know exactly what is needed, so this study tried to determine the limit drift ratio of a traditional wall by using the minimum information available such as wall deformation and wall size. It has been confirmed that in the case of a traditional wall with studs inside, such as the right wall of Muyangsujeon wall, an unstable condition may occur when the limit drift ratio of the point in the center of the wall divided by the height of the wall divided by the wall height approaches 3.1%.
황종국(Hwang, Jong-Kook),권양희(Kwon, Yang-Hee),배동훈(Bae, Dong-Hun) 대한건축학회 2019 大韓建築學會論文集 : 構造系 Vol.35 No.3
The purpose of this study was to estimate the resistance capacity of a traditional wooden house with shear walls made of wood panel. In order to achieve the purpose of the study, the load - displacement test was carried out and the resistance moment values of the shear walls were proposed. The shear walls were made by placing studs with a nominal dimension of 38 ㎜ × 89 ㎜ at intervals of 600 ㎜, and attaching 12 ㎜ thick plywood with 8-d size pegs at intervals of 150 ㎜. The type of traditional building wall was classified and showed the moment resistance ability of each wall type. This value is expressed as a proportional value divided by the moment resisting capacity of the standard size shear walls not divided into the divided small frames. Although some frames have proportional values larger than 1.0 even though they have openings, most of them show values smaller than 1.0. Also, even without the openings, it showed a smaller value than 1, such as 0.84 and 0.67.
황종국(Hwang Jong-Kook),홍성걸(Hong Sung-Gul),이영욱(Lee Young-Wook),정성진(Jung Sung-Jin) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.5
In this research a dynamic testis performed to evaluate vibration characteristics of the main building of Bongjeong-sa (temple) in the laboratory. For this purpose, a one-third scale model with the roof-dead load of 46,710N is designed and prepared on a steel sliding table of 5m by 4m. From the result of the vibration test, we evaluate natural frequency, transfer function between base layer and damping ratio of the building. The dimensions of this test building are 2910㎜ wide and 4450㎜ long. Although the soil walls, windows and doors exist between the columns, to exclude the effect of other variables other than the joints of columns and connecting beams, they were not contained in this test model. Also, the top part of roof was not contained in this test model and replaced by weight. In process of the random vibration experiment, we observe that the natural frequency of test building changes according to the magnitude of vibration. To confirm the variation of natural frequency, the random vibration test was performed for the RMS amplitude of different kinds. To confirm exactly the shift effect of predominant frequencies and the variation of transfer function value, sine waves that the amplitude changes from 0.2㎜ to 2.5㎜ were actuated and transfer function was calculated. A free vibration experiment is performed to determine damping ratio and verify the variation of damping ratio by the magnitude of initial impact displacement.
풍동실험과 수치해석에 의한 이어도 해양과학기지 풍력산정
황종국(Hwang Jong-Kook) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.8
A wind tunnel experiment was performed to estimate the wind forces of Ieodo Ocean Research Station. The structure portion above water surface was modelled with 1/80 scale ratio. The wind velocity in the wind tunnel was 8㎧. The numerical analysis of the wind tunnel test model was performed. The numerical analysis results and the wind tunnel test results on average wind forcecoefficients were compared to validate the accuracy of the numerical analysis. In the numerical analysis, the minimum thickness of finite elements and boundary conditions were considered as main analysis parameter. The minimum thickness of finite elements was decided to simulate boundary layer. Wall boundary condition is used on the structure and the ocean. On the far boundaries, symmetry boundary condition is used except velocity inlet and pressure outlet boundaries. The numerical analysis of the real sized model under the operating condition(30㎧ wind velocity at the altitude of 10m) was performed and compared with wind tunnel test results.