• 한국실내디자인학회논문집
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• 제21호
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• pp.42-53
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• 1999

The purpose of this study is to clarify the relationship between the exhibits layout and the spatial organization in exhibition spaces. As an analytical method, the space syntax theory devised by Bill Hillier(1984) was applied for analysing the potential differentiation of exhibition spaces and remodeling method in Seoul City Museum selected for case study. The results are as following. Especially from the convex analysis, axial analysis and exhibits(interpretation); 1) the closed spatial system(1F) has high visibility and high intelligibility in hall area but lacks route continuity, 2) the circulated spatial system(2F) has low global visibility but offers high intelligibility and connectivity due to its coercive circulation, 3) and the organization of exhibition design consists in differentiating space that reintegrates them into another spatial order. Therefore, there process are expected to provide a methodological framework for analysing and interpreting spatial organizations of design, leading to the clear explanation of remodeling.

• Computers and Concrete
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• 제13권2호
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• pp.235-253
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• 2014

The theoretical basis and the main results of a design procedure, which attempts to provide the optimal layout of ordinary reinforcement in prestressed concrete beams, subjected to bending moment and shear force are presented. The difficulties encountered in simulating the actual behaviour of prestressed concrete beam in presence of coupled forces bending moment - shear force are discussed; particular emphasis is put on plastic models and stress fields approaches. A unified model for reinforced and prestressed concrete beams under axial force - bending moment - shear force interaction is provided. This analytical model is validated against both experimental results collected in literature and nonlinear numerical analyses. Finally, for illustrating the applicability of the proposed procedure, an example of design for a full-scale prestressed concrete beam is shown.

• 항공우주기술
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• 제6권2호
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• pp.205-210
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• 2007

75톤급 액체 로켓 엔진용 터보펌프의 산화제펌프에 대한 로터다이나믹 설계를 수행하였다. 인듀서와 임펠러 및 베어링의 축배치는 항우연에서 개발 중인 유사한 구조를 가지는 터보펌프를 근간으로 하였고, 75톤급 산화제펌프 수력 설계에 맞추어 인류서, 임펠러의 축길이가 반영되었다. 후방 베어링으로부터 임펠러까지의 거리를 베어링 하중 설계에 대한 설계 변수로 고려하였고, 전방 베어링과 후방 베어링의 강성을 변화시키면서 회전 속도에 따른 비동기 고유진동수 해석을 수행하여 산화제 펌프의 임계속도를 고찰하였다. 베어링에 적절한 하중이 부과된다면 산화제 펌프의 임계속도는 기준속도 11,000 rpm과 비교하여 충분히 높기에, sub-critical 로터로서 기준속도 이내에서 안정적인 터보펌프의 운용이 가능하리라 판단된다.

• Earthquakes and Structures
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• 제11권1호
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• pp.141-163
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• 2016

Fiber models have been developed and applied to various structural elements such as shear walls, beams and columns. Only scarcely have fiber models been applied to circular foundation systems such as cast in drilled holes shafts (CIDH). In pile foundations with constraint head boundary conditions, shear deformations can easily contribute to the lateral pile response. However, soil structure interaction formulations such as the p-y method, commonly used for lateral pile design, do not include structural shear deformations in its traditional derivation method. A fiber model that couples shear and axial-bending behavior, originally developed for wall elements was modified and validated on circular cross sections (columns) before being applied to a 0.61 m diameter reinforced concrete (RC) pile with fixed head boundary conditions. The analytical response was compared to measured test results of a fixed head test pile to investigate the possible impact of pile shear deformations on the displacement, shear, and moment profiles of the pile. Results showed that shear displacements and forces are not negligible and suggest that nonlinear shear deformations for RC piles should be considered for fixed-head or similar conditions. Appropriate sensor layout is recommended to capture shear deformation when deriving p-y curves from field measurements.

• 국제초고층학회논문집
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• 제6권2호
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• pp.139-147
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• 2017

Analyzing morphological evolution over a long period of time is deemed an effective way to identify problems occurring in the process of urban development, in addition to achieving a fundamental understanding of socio-cultural changes and growth rooted from the context. As far as the urban morphology is concerned, Hong Kong is characterized by its unique high-density and compact layout patterns, which have aroused the interest of a number of authors in the urban design domain. Whilst an increasing number of redevelopment projects in Hong Kong were criticized for ignoring and destroying the old urban fabric, there is a need for research to investigate the origins and changes of various urban patterns and their implications for society. By employing the theories and techniques of space syntax, this paper accordingly provides a morphological analysis based on the Wanchai District - a 'Segment-line' city, which particularly epitomizes various urban grids of Hong Kong and may have different implications for functional aspects. By axial-mapping the urban layouts of five stages of growth since 1842 and subsequently investigating their spatial and functional transformation over the past 170 years, this paper identifies a series of spatial characteristics underlying different grid patterns, as well as achieves a precise understanding of their ever changing relationship. Based on these understandings, this paper intends to provide valuable reference and guidance for upcoming spatial development in Hong Kong and other regions.

• 한국생산제조학회지
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• 제22권4호
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• pp.635-642
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• 2013

We have prepared a DEMO conveyor device for conveying a large 8G class glass sheet using ahorizontal air-cushion system. This device consists of the body frame and the driving frame that are combined to realize a frame for conveying glass without any contact.The driving frame comprises an air flotation table (bed), drive roller supported at both ends, and ASU. Part of the ASU serves to control the airflow as the chamber consists of a porous pad and fan. Fiber filters replace the porous pad and axial fans serve as an air compressor. In addition, to determine the appropriate glass levitation from the air table, this study examined the design specifications of the applied filter (discharge speed of HEPA and ULPA filters, and flow rate) as well as the height of the and the proper supporting roller height (14mm). Then, after adjusting the position of the ASU and the number of ASUs required to configure the UNIT air floating C/V, we analyzed the height and flatness of the glass and derived the appropriate layout (1140-mm distance between ASUs).

• Advances in concrete construction
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• 제11권1호
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• pp.33-43
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• 2021

A new type of composite insulated concrete sandwich wall (ICS-wall), which is composed of a triangle truss steel wire network, an insulating layer, and internal and external concrete layers, is proposed. To study the mechanical properties of this new ICS-wall, tensile, compression, and shearing tests were performed on 22 specimens and tensile strength and corrosion resistance tests on 6 triangle truss joints. The variables in these tests mainly include the insulating plate material, the thickness of the insulating plate, the vertical distance of the triangle truss framework, the triangle truss layout, and the connecting mode between the triangle truss and wall and the material of the triangle truss. Moreover, the failure mode, mechanical properties, and bearing capacity of the wall under tensile, shearing, and compression conditions were analyzed. Research results demonstrate that the concrete and insulating layer of the ICS-wall are pulling out, which is the main failure mode under tensile conditions. The ICS-wall, which uses a graphite polystyrene plate as the insulating layer, shows better tensile properties than the wall with an ordinary polystyrene plate. The tensile strength and bearing capacity of the wall can be improved effectively by strengthening the triangle truss connection and shortening the vertical distances of the triangle truss. The compression capacity of the wall is mainly determined by the compression capacity of concrete, and the bonding strength between the wall and the insulating plate is the main influencing factor of the shearing capacity of the wall. According to the tensile strength and corrosion resistance tests of Austenitic stainless steel, the bearing capacity of the triangle truss does not decrease after corrosion, indicating good corrosion resistance.

• 한국전통조경학회지
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• 제35권4호
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• pp.29-42
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• 2017

제주도 소재 정의향교는 전통적인 유교 예제건축으로 유교문화경관을 표상하는 사례가 된다. 조선 태종16년(1416)에 정의현 설치와 함께 성산읍 고성리에 처음 세워졌으나 헌종 15년(1849)에 성내 서쪽으로 이건하여 오늘에 이르고 있는 유구한 역사를 가진 곳이다. 향교가 가지는 문화경관 자원의 특성을 공간구성과 유교의 공간예제 적용방식을 통하여 규명하는데 연구의 목적을 두었다. 연구를 위하여 정의향교가 가지고 있는 유교문화경관의 공간구조와 유교예제에 관한 특징을 다음과 같은 항목으로 분석하였다. 즉 정의향교의 건립과 이건에 따른 변화과정, 고지도를 통한 입지적인 해석, 정의향교의 유교적 상징요소, 공간구성과 배치형태, 물리적 구조, 주요건축물, 지형면에서의 입지특성, 축선의 변화, 그리고 대성전 전면공간의 위요감(D/H비) 등을 통하여 유교예제가 공간구조에 나타나는 특징을 파악할 수 있었다. 정의향교는 제주도라는 단절된 섬 지역에서 지역의 특수성을 고려하여 유교적 교화를 실현하기 위하여 건립되었으며, 성내 입지라는 한정된 공간 조건 가운데서도 수평적, 수직적으로 다양한 배치기법을 통하여 유교 특유의 공간예제를 적용하고 있는 것을 볼 수 있었다. 따라서 이러한 점을 되살려서 정의향교만이 가지고 있는 독특한 유교문화경관을 활용할 수 있도록 해야 할 것이다.

• 한국전통조경학회지
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• 제36권4호
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• pp.18-27
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• 2018

본 연구는 황가원림이 중국 고전원림을 집대성한 산물임을 상정하고 황가원림에 연출된 경관 특성을 분석한 연구이다. 이화원에는 아름다운 경관을 감상하고자 한 황제의 욕망을 위해 다양한 경관연출기법이 적용되었는데 이에 따른 경관 특성은 다음과 같이 정리할 수 있다. 첫째, 이화원은 차경, 주경, 배경, 대경, 협경, 분경, 광경, 누경, 첨경 등 다양한 조망처리기법을 통해 다양한 원림경관을 형성하고 있다. 둘째, 남북의 중축선을 기준으로 한 건축물을 대칭구도 및 장랑구조, 시각생리를 고려한 경점의 배치를 통해 경관 감상에 집중할 수 있도록 하였다. 셋째, 중국 각지의 명승지 경관을 이화원의 고유한 지형적 특성에 맞게 도입하는 명경이식기법을 활용하였다. 이화원에는 항주와 기창원, 소주의 산당가의 경관이 재현 이식되어 공통적으로 강남지역의 경관이 이식되어 있음을 확인하였다. 이상의 3가지 기법들은 원림 내에 공간감을 살리고, 풍부한 경관을 연출할 뿐 아니라 유람객의 시선을 자연스럽게 유도하고 집중시키는 효과가 있음을 확인하였다.