• 한국공간구조학회논문집
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• 제4권4호
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• pp.77-84
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• 2004

Researches on spherical shell which is most usually applied have been completed by many investigators already and generalized numerical formula was derived. But the existent researches are limited to those on spherical shell with isotropic or orthotropic roof stiffness, periodic distribution of roof stiffness that can be caused by spherical and latticed roof system is not considered. Therefore, the object of this study is to develop a structural analysis program to analyze spherical shells that have periodicity of roof stiffness distribution caused by latticed roof of large space structure, grasp buckling characteristics and behavior of structure.

• 한국가스학회지
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• 제9권4호
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• pp.36-43
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• 2005

본 논문은 다구찌 설계방법을 이용하여 LNG저장탱크의 지붕 구조물에 대한 최적설계 조건을 확보하기 위해 FEM해석을 수행하였다. 다구찌 설계방법은 저장탱크 구조물의 설계인자에 가장 큰 영향을 미치는 파라메터를 고찰하고 최적화하는데 유용한 결과를 제시하였다. 다구찌 설계방법으로 수행된 FEM 해석결과에 따르면, LNG저장탱크 지붕 구조물의 최적설계에 필요한 인자로 지붕 중심부의 두께를 언급하고 있다. 안전하면서 효율적인 지붕을 건설하기 위한 철근 콘크리트 지붕의 초기 구조물 설계는 반경방향의 H빔과 원주방향의 L빔을 가능한 작은 수량으로 배열하고 두꺼운 지붕 구조물을 갖춘 LNG 외부탱크가 최적이라는 해석결과를 제시한다.

• 한국공간구조학회논문집
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• 제13권1호
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• pp.51-57
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• 2013

There can be diverse causes in the destruction of a large space structure by strong wind such as characteristics of construction materials and changes in internal and external wind pressure of the structure. To evaluate the wind pressure of roof against the large space structure, wind pressure experiment is performed. However, in this wind pressure experiment, peak internal pressure coefficient is set according to the opening of the roof in Korea wind code. In this article, it was tried to identify the change of internal pressure coefficient and the characteristics of wind pressure coefficient acting on the roof by two kinds of opening on the side of the structure with Hyperbolic Paraboloid Spatial Structures roof. When analyzing internal pressure coefficient according to roof shape, it was found that minimum (52%) and maximum (30%~80%) overestimation was made comparing to partial opening type proposed in the current wind load. It is judged that evaluation according to the opening rate of the structure should be made to evaluate the internal pressure coefficient according to load.

• 한국산학기술학회논문지
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• 제14권12호
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• pp.6504-6513
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• 2013

본 연구에서 농촌주택을 대상으로 농촌주택의 구법과 재료의 지역별 시기별 변화 특징 분석결과, 지붕형태는 팔작지붕/우진각지붕(1970)-평지붕(1980)-맞배지붕(1990), 지붕구조재료는 한식목조/간이한식목조-파라펫눈썹지붕/경사슬래브-양식목조-경량철골조, 지붕마감재료는 초가/한식기와-슬레이트-시멘트/강판-아스팔트슁글/샌드위치패널/몰탈방수, 벽체구조재는 한식목조/간이한식목조-시멘트조적조-RC조-경량철골조/양식목조, 벽체마감재료는 흘미장/회벽-치장벽돌쌓기/시멘트미장위 페인트마감-자연석치장/사이딩/타일, 담장재료는 전시기별로 돌담과 시멘트블록, 마당재료는 흙바닥, 콘크리트가 사용된 것으로 나타났다. 지역별 변화특징으로 주택구조, 지붕형태, 지붕구조재료, 벽체마감재료, 외부공간에서 담장재료와 마당재료는 북부지역, 중부지역, 남부지역별로 농촌주택 특징변화의 차이가 나타났으며, 지붕구조재료, 벽체구조재료는 지역별로 유사한 변화양상이 나타나는 것으로 분석되었다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 추계학술대회 논문집
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• pp.338-343
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• 2005

We have evaluated the structural integrity of a sandwich composite train roof which can find a lightweight, cost saving solution to large structural components for rail vehicles in design stages. The sandwich composite train roof was 11.45 meter long and 1.76 meter wide. The reinforced frame was inserted in sandwich panels to improve the structural performance of train roof structure and had the shape of hollow rectangular box. The finite-element analysis was used to calculate the stresses, deflections and natural frequencies of the sandwich composite train roof against the weight of air-condition system. The 3D sandwich FE model was introduced to simulate the hollow aluminum frames which jointed to both sides of the sandwich train roof. The results shown that the structural performance of a sandwich composite train roof under load conditions specified was proven and the use of aluminum reinforced frame was beneficial with regard to weight savings in comparison to steel reinforced frame.

• 한국공간구조학회논문집
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• 제2권4호
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• pp.37-44
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• 2002

The cable staying roof structure of Jeju worldcup stadium should be erected with correct prestressed force that is required by the structural engineer who designs this structure. This study evaluated and adapted the erection process of cable, the erection force and the measurement of cable force for Jeju worldcup stadium. The process of erection is required not only to calculate erection force but also to check structural stability, following process, construction period and using cranes. Considering the site conditions and technical problems, this study can attain successfully the erection of cable staying roof structure of Jeju worldcup stadium with allowable errors.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2002년도 가을 학술발표회 논문집
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• pp.421-424
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• 2002

Concrete roof in In-Chon LNG tank #15~18 is a very important structure. Precise control of quality is needed. This roof has 0.6~1.5m thickness, 36.23m radius, and, 12.7m height. So in this structure thermal crack caused by hydration heat should be controled. In this project belite cement plus LSP concrete is used. As a result of ambient temperature rising test and thermal analysis using FEM, this belite cement plus LSP concrete is expected to control the thermal crack well.

• 대한건축학회논문집:계획계
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• 제36권2호
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• pp.63-70
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• 2020

In the ancient Buddhist temple area, various metal artifacts are still excavated. Therefore, the aim of this study is to approach the characteristics of ancient architecture through ancient metal artifacts. First, metal decoration of ancient architecture appears for the purpose of structure, decoration, arson. Then, as the method of wood structure is developed, the application is separated into structural, functional and decorative purposes. In ancient times, metal decoration has reduced the role of structure, but its decorative role has expanded. Second, various metallic ornaments were used on the roof of ancient architecture. As the wooden technology developed, the metal decoration was gradually omitted while applying the curve to the roof. Third, the metal ornaments used on the roof of ancient architectures include the ridge central decoration, roof top decoration, a nine-ring decoration, gable board Ornamental Metal, corner flower decoration, eaves nail, wind bell. And subsequent research requires a terminology that can link the results of archeology and Buddhist art through excavation as a result of architecture.

• 한국농촌건축학회논문집
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• 제14권3호
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• pp.109-119
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• 2012

This study aims to analyze architectural characteristics of railway station facilities which were built with development of railroads from Japanese Colonial Period to 1950's. To achieve this goals, 7 railway stations in Gyeongju area that are worth preserving were set up as research targets. For this study, I analyzed literature of the railway station and drawings which the KORAL Daegu Branch is keeping. Railway stations without a construction drawing investigated a direct visit. After analyzing the railway station facilities, the architectural properties such as plan, elevation and section have been identified. The results are as follows. First, Each modern railway station is usually consisted of waiting room and office, and ancillary spaces have been added. Over the years, however, the space was expanded horizontally. In that case, the structure and finish materials have been changed, like now. Second, Most of the roof shape is 'Matbae'(gable roof), especially Gyeongju station and Bulguksa Station are 'Woojingak roof. The roof structure is truss structure, especially as Pratt and Scissors type, but Gyeongju Station's structure is a reinforced concrete. Third, main doorway of waiting room is located in the center of the front gable. However, small stations like 'Ahwa' and 'Ipsil' station to ensure the passengers' waiting area are placed next to the office area.

• 한국공간구조학회논문집
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• 제3권2호
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• pp.69-75
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• 2003

In case of rectangular lattice dome which shearing rigidity is very small, it has a concern to drop Buckling strength considerably by external force. So, by means of system to increase buckling-strength, there is a method of construction that lattice of dome is one with roof material. In a case like this, shearing rigidity of roof material increases buckling-strength of the whole of structure and can be designed economically from the viewpoint of practice. In case of analysis is achieved considering roof material that adheres to lattice of dame, there is method that considers the rigidity that use effective width frame as method to evaluate rigidity of roof material. therefore, this study is aimed at deciding effective width of roof material united with rectangular lattice dome to evaluate rigidity of roof material by effective width of frame and investigating how much does rigidity of roof material united with lattice of dome increase buckling-strength of the whole of structure according to rise-ratio. Conditions of loading are vertical-type-uniform loading. Analysis method is based on FEM dealing with the geometrically nonlinear deflection problems.