• International Journal of Naval Architecture and Ocean Engineering
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• 제6권4호
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• pp.1197-1208
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• 2014

The problem of the oblique water entry of a three dimensional body is considered. Wagner theory is the theoretical framework. Applications are discussed for an elliptic paraboloid entering an initially flat free surface. A dedicated experimental campaign yields a data base for comparisons. In the present analysis, pressure, force and dynamics of the wetted surface expansion are assessed.

• 한국실내디자인학회논문집
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• 제18권6호
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• pp.52-59
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• 2009

In the study will look into how Baroque concepts are expressed in architectural space by analyzing the concepts of Baroque formative vocabularies applied in his architecture through a Spanish architect Paolo Portoghesi. Baroque is regarded as the philosophical thought that means enlargement toward diversity of a firm and fixed trend beyond the concept of a certain epochal form of 16th and 17th century architecture. In addition, it is from the free attitude and the intelligent and formal stereotype, and signifies common conditions more than one style in architecture history. Paolo Portoghesi proposes to express gestalt approach by Baroque precedent in his architecture through plasticity and geometric collision technique. Here, the expression of plasticity means the effect that gives formative rhythm to Baroque curved structures. That is the method to expand the formative possibility by changing various materials such as bricks, concrete, and timbers. Second, the geometric collision technique is the technique to constitute the flat form of overall space through the juxtaposition technique, Baroque symmetrical and homogeneous geometric manipulation technique. Accordingly, this study will overcome Inlimitation of formative monotony and expression of abstraction that modernism architecture has, and examine formative waste and conflicts which may be derived from impractical architectural languages of the concept of excessive disorder or the minimum form. This discussion is considered as the first step to tune balance between productivity and formativeness in modern architecture.

• 건축역사연구
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• 제32권5호
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• pp.7-20
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• 2023

This study aims to reveal the multilayered nature of the formal aspects of communal house architecture in North Korea. It is said that Kim Jong Il, who emerged as a successor after the mid-1970s, brought about a change in the architecture, leading the construction of a sculptural communal house on Gwangbok Street in 1989, and wrote The art of architecture (1992), which theorized architecture as an object of art. Therefore, it is widely perceived that the communal house was transformed from a simple form of living function to an artistic architecture with the rise of Kim Jong Il. This study, however, argues that this change was the result of an internal evolution in North Korean architecture, rather than a simple change in the position of an individual in power. It seeks to move away from the dichotomy that divides the communal house into two periods: the "KimIl-sung period," in which the communal house was laid out in a simple form to provide mass supply and a socialist lifestyle, and the "Kim Jong-il period," in which the communal house took on an artistic form, such as the Gwangbok Street communal house, in the early years of reconstruction. In the 1950s and 1960s, before KimJong-il's arrival, the communal house form was not simply a flat arrangement, but a three-dimensional and sculptural consideration of the effect on the cityscape.

• 한국농촌건축학회논문집
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• 제7권1호
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• pp.1-10
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• 2005

The aim of This study is to establish existing of Munhwa-Maul, and analysis exterior form and elevation types of housing in new village of rural area. And it was studied on data and general conditions about it. The analysis of this research is divided into main categories as follow; classification of exterior form types, drawing an elevation of housing in Munhwa-Maul. So, I needed both field survey and research for data of 22 new village. Through this study and the results of survey are as follows; Munhwa-Maul is role to establish people settled village in rural area. The types of house are several and various in Munhwa-Maul. Especially, masonry construction type of housing has about 80%. But recently new types of housing are on the increase. So, Munhwa-Maul has a new landscape of village. It was grouped by three exterior form of dwelling housing. The ratio of box form has about 40%. Lastly, the types of elevation are four. Flat-roof style has about 70% including eyebrow flat-roof.

• 대한조선학회논문집
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• 제42권2호
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• pp.159-164
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• 2005

Monostatic RCS analysis of complex structures has been done with a combined method of physical and geometric optics, commonly applied to high frequency electromagnetic backscattering problems. In the analysis, the complex structure is modeled as a number of flat surfaces and the RCS of whole structure is calculated by summing RCS of each surface, which can be obtained from an analytical solution of flat surface phase integral derived from physical optics. The reflected and hidden surfaces are searched by an object precision method based on adaptive triangular beam method, which can take account for effects of multiple reflections and polarizations of electromagnetic wave. The validity of the presented RCS analysis method has been verified by comparing with exact solutions and measured data for various structures.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제18권3호
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• pp.41-49
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• 2012

Most large-sized and tall-risen general hospitals of today fairly depend on in-patient wards in designing hospital styles. The core planning for the efficient movements of various people in the words should take into account the sustainable connections between/among the floors, as well as hospital structures and mechanical functions. This study sampled for the study 19 hospital in-patient wards and investigated their flat-core styles. It was found out that hospital structures are changing from symmetrical styles of triangles, quadrangles and rectangles through bending, configuring, transforming to efficient new styles. Symmetrically quadrangled flat-styles are made of multi-cores spread with main an sub-cores. In contrast, symmetrically triangled flat-styles place the open place in the middle in order to prevent from its deepening, and widened the depth line through changing the outdoor top point. Non-symmetrical rectangles minimized the depth value to maintain the recent styles used in the wards, and tended to prefer the transformed styles of quadrangles. The double-corridors easily transshaped from mono corridors reveals the triangled, W-shaped, or Y-shaped figures. The site area ratio of the cores is 11.95% in average. The number of beds which one elevator covers is 66.51 beds in average, and the size of site area which one elevator covers 216.68m. Most cores on the base floor clustered around the average value, with more than 1000 beds shoes 12.83%, does 12.93%, does 14.64%, does 14.58%, which says that the core ratio increases according to hospital beds.

• 콘크리트학회논문집
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• 제16권2호
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• pp.163-174
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• 2004

플랫플레이트-기둥 접합부의 뚫림전단강도를 규명하기 위해 그동안 많은 실험연구가 수행되어 왔다. 실험결과에 의하면, 뚫림전단강도는 접합부의 기둥크기, 철근비, 경계조건 등 다양한 설계변수에 따라 크게 변화하는 것으로 나타났다. 하지만 현행 설계기준들은 설계변수의 영향을 정확히 반영하고 있지 못한 실정이다. 본 연구에서는 뚫림전단의 파괴메카니즘을 정의하기 위하여, Rankine의 파괴기준을 이용하는 구조역학적 접근법이 사용되었다. 파괴메카니즘은 접합부에 배치된 하부철근량에 따라 압축지배 전단파괴와 인장지배 전단파괴로 분류되며, 또한 뚫림전단강도는 슬래브의 휨손상에 밀접한 영향을 받는 것으로 밝혀졌다. 이 연구결과에 근거하여 콘크리트의 뚫림전단강도식을 개발하였으며, 제안된 방법은 기존 실험연구결과와 비선형 수치해석결과와의 비교를 통해 타당성이 검증되었다. 비교결과, 다양한 설계변수의 영향을 반영하고 있는 제안된 강도모델은, 현행 설계기준보다 접합부의 뚫림전단강도를 정확히 추정할 수 있는 것으로 밝혀졌다.

• 콘크리트학회논문집
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• 제15권3호
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• pp.470-481
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• 2003

플랫 플레이트 구조의 외부접합부는 편심전단에 대해 비대칭형의 위험단면을 가지고 있으며, 위험단면의 길이가 내부접합부 보다 작고 중력하중과 횡하중 모두에 의해 편심전단응력이 발생하게 되므로 뚫림전단파괴에 대해 대단히 취약하다. 외부접합부의 거동은 대단히 복잡하며 또한 구조해석에서 사용하고 있는 강도모델이 부적합하기 때문에, 현 설계기준은 실험결과를 정확히 설명하고 있지 못하다. 본 연구에서는 이러한 현 설계기준의 미비점을 보완하기 위하여 슬래브-기둥 외부접합부에 대해 비선형유한요소해석을 수행하였다. 외부접합부에서는 횡하중의 재하방향에 따라 거동 및 최대강도가 상이하며, 해석결과에 근거하여 하중재하방향 별로 외부접합부에 대한 강도모델을 제안하였다. 제안된 강도모델은 실험결과와의 비교를 통해 검증되었다.

• 콘크리트학회논문집
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• 제17권2호
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• pp.191-200
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• 2005

무량판 구조의 슬래브-기둥 접합부는 취성적인 전단유형으로 파괴되며, 이는 전 구조물의 붕괴를 유발할 수 있다. 본 연구에서는 새로운 전단보강방법으로서 래티스 철근을 이용한 전단보강방법을 개발하였다. 실험연구를 실시하여 래티스 전단보강 실험체와 무보강 실험체의 접합부 전단강도 및 연성도를 비교하였다. 실험결과 래티스 철근으로 전단보강한 실험체는 전단보강하지 않은 실험체에 비해 평균적으로 강도면에서 1.37배, 연성도면에서 9.16배 증가하였다. 이는 래티스 철근이 무량판 구조의 전단보강재로서 전단강도와 연성도 측면에서 매우 효과적인 보강방법임을 입증하고 있으며, 현재 미국에서 접합부 전단보강재로 널리 사용되고 있는 스터드레일 전단보강보다 연성능력이 훨씬 우수한 것으로 나타났다. 또한 실험결과에 근거하여 래티스전단보강의 강도평가방법을 개발하였다.

• 한국재난정보학회 논문집
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• 제8권3호
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• pp.297-303
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• 2012

본 연구는 목조문화재 지붕 적심부의 화재전파 차단기능을 확보하기 위해 개판 상부에 설치하는 방염천의 차열성능을 알아보기 위한 실물모형 실험을 실시하여 방염천의 차열성능을 검증하고, 그 밖에 방염천의 설치방식에 따른(평형식과 접이식) 방화성능을 비교 분석하였다. 실험 결과, 방염천을 개판 상부에 평형식으로 설치한 경우 개판 하부온도가 $750^{\circ}C$일때 개판 상부온도가 $50^{\circ}C$로 $700^{\circ}C$ 정도의 온도차를 나타냈고 이는 방염천 미설치 시와 비교했을 때 개판 상부온도가 $580^{\circ}C{\sim}600^{\circ}C$ 정도 낮은 것으로, 방염천 설치로 인한 차열성능이 우수한 것으로 평가되었다. 방염천을 개판 상부에 접이식으로 설치한 경우 개판 하부온도가 $600^{\circ}C$일 때 개판 상부온도는 $65^{\circ}C$로 약 $530^{\circ}C$ 정도의 온도차를 보여 평형식으로 설치한 경우보다는 차열성능이 약간 떨어지는 것으로 나타났다.