• 대한건축학회논문집:계획계
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• 제36권1호
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• pp.93-104
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• 2020

The purpose of this research is to clarify the relationship between the location of markets and the spatial structure of historic center in Beijing of 18th century by network analysis method onto the historic map of Beijing 'Qianlong-Jincheng-Quantu(乾隆京城全圖)' produced in 1750. By categorizing the grade of each market, it is revealed that the location of markets in Beijing under Qing Dynasty was not only decided by the various factors as policy of the regime and traditional social usages but also by the spatial structure of urban space in historic part of the city. At the same time, the sociopolitical factors and the spatial structure of urban space might influence reciprocally in defining the physical state of urban space.

• 한국환경복원기술학회지
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• 제12권6호
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• pp.99-111
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• 2009

There have been continuous studies about urban parks since 1971 until now. However, there was neither deep analysis of park space nor research about green areas and lawn space. Below is the summary of the main results obtained based on the analysis of the problems with the spatial structure and park facilities of 8 examinatory parks. The analysis of use pattern revealed that lawns in green areas are becoming almost unusable spaces. Therefore plans for more active utilization of lawn space is necessary. There were high correlations among unnecessary and necessary factors of park, use of green areas and the reasons for not using it; thus the analysis suggested that other plans be considered for utilization of lawn space in oder to obtain stronger efficacy. The objective of the present research was to suggest an opinion concerning the improvement of spatial structure of urban parks, by making unusable spaces of parks usable through appropriate park structuring, so that users can utilize more parks. Especially with regard to green areas, the present research has a meaning in that it suggested a method of improving spatial structure by means of green areas desired by users and facilities they can use.

• 한국공간구조학회논문집
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• 제8권1호
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• pp.41-48
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• 2008

대공간 구조물은 3차원적인 힘의 흐름과 면내력에 의해 외부하중에 대한 저항 능력을 극대화 시킨 형태 저항 구조로서, 일반적인 골조와는 달리 부재에 대한 유한 변형을 동반 하므로 정적, 동적 해석에 관계없이 비선형 해석이 요구 된다. 대공간 구조물의 정확한 구조 해석을 수행하기 위해서는 기하학적 비선형 및 재료적 비선형 뿐 아니라 두 효과를 함께 고려한 비선형 해석이 필요하다. 기하학적 비선형 문제가 구조재료의 특성 및 위치에 따른 비선형을 고려하지 못하고, 구조재료의 비선형 문제가 기하학적 형상에 따른 비선형을 고려하지 못한다는 상호간의 단점을 해결하기 위하여, 본 논문에서는 유한요소법으로 기하학적 비선형을 고려한 비선형 평형방정식을 적용하고, 부재의 응력-변형률 관계를 이용하여 재료적 비선형성도 함께 고려하였다. 사용된 수치해석 기법은 불안정 경로의 해를 찾아갈 수 있는 호장법을 적용하여 하중-변위 곡선을 추적하였다. 본 연구의 수치 해석결과 제시한 평면 트러스의 비탄성 비선형 거동을 정확하고 효율적으로 예측 가능한 것으로 나타났다.

• 한국지리정보학회지
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• 제17권4호
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• pp.167-178
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• 2014

수도권의 과도한 집중에 따른 부작용을 해소하고 국가 균형 발전 및 국가경제력 강화를 위하여 2012년 출범한 세종시는 대규모 택지개발이 급격한 개발속도로 이루어지면 주변지역 공간구조의 변화가 예상된다. 본 연구는 세종시 출범에 따른 인접지역의 공간구조 변화를 측정하기 위한 일환으로 공간적 상호작용 측면에서 접근하였다. 분석은 Accessibility 모델을 이용하여 미래 공간 상호작용을 위한 잠재력인 인구잠재력을 계산하고, 인구잠재력을 지표로 활용하여 공간패턴분석기법에 적용함으로써 세종시 건설 전후 인접지역들의 공간적 상호작용 결과를 정량적 정성적으로 해석하였다. 분석결과 1995년 이후 대상지역 인구잠재력의 영향범위는 지속적으로 감소하는 것으로 나타났으며, 2013년에는 천안시를 중심으로 인구가 집중하여 인구잠재력이 분산되는 것으로 나타났다. 세종시는 새로운 인구잠재력 지대로써 주변지역에 대한 구심점 역할을 수행하지 못하는 것으로 나타났지만 세종시의 입주가 얼마 지나지 않은 시점에서의 분석결과 때문으로 판단된다. 따라서 세종시의 계획인구 도달을 위한 노력과 함께 인구증가에 따른 요인들의 변화와 주변 도시들의 공간구조변화에 대한 지속적인 모니터링이 필요하다고 하겠다.

• Structural Engineering and Mechanics
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• 제31권2호
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• pp.137-152
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• 2009

Mechanic behavior of Y-shape thin-walled box girder bridge structure is complex, so one can not exactly hold the mechanical behavior of the Y-shape thin-walled box girder bridge structure through general calculation theory and analytical method. To hold the mechanical behavior better, based on elementary beam theory, by increasing the degree of freedom analytical method, taking account of restrained torsiondistortion angledistortion warp and shearing lag effect at the same time, authors obtain a thin-walled box beam analytical element of 10 degrees of freedom of every node, derive stiffness matrix of the element, and code a finite element procedure. In addition, authors combine the obtained procedure with spatial grillage analytical method, meanwhile, they build a new analytical method that is the spatial thin-walled box girder element grillage analysis method. In order to validate the precision of the obtained analysis method, authors analyze a type Y-shape thin-walled box girder bridge structure according to the elementary beam theory analytical method, the shell theory analytical method and the spatial thin-walled box girder element grillage analysis method respectively. At last, authors test a type Y-shape thin-walled box girder bridge structure. Comparisons of the results of theory analysis with the experimental text show that the spatial thin-walled box girder element grillage analysis method is simple and exact. The research results are helpful for the knowledge of the mechanics property of these Y-shape thin-walled box girder bridge structures.

• 한국공간구조학회논문집
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• 제11권3호
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• pp.137-145
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• 2011

최근 건축 경향에 따라 단층 프리폼 구조에 대한 관심이 증대되고 있다. 축력과 모멘트를 동시에 받는 구조적인 특성으로 인해 프리폼 구조에서 노드는 응력이 집중되는 부분으로 상세 개발이 이루어져야 한다. 본 논문은 단층 프리폼 구조의 모멘트형 노드를 제안하고 축력과 모멘트에 대한 유한요소해석을 수행하였다. 유한요소해석을 통해 내력이 검증된 모델에 구멍 크기 및 위치에 따른 변수를 적용하여 변수해석을 진행하였고 결과를 비교분석하여, 구조적인 성능을 만족하여 안전성을 가지고 동시에 물량도 가장 절약할 수 있는 노드 Prototype을 결정하였다.

• Journal of the Korean Data and Information Science Society
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• 제17권4호
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• pp.1181-1190
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• 2006

Statistical analyses for spatial data are important features for various types of fields. Spatial data are taken at specific locations or within specific regions and their relative positions are recorded. Lattice data are synoptic observation covering an entire spatial region, like cancer rates corresponding to each county in a state. Until now, the echelon analysis has been applied only to univariate spatial data. As a result, it is impossible to detect the hotspots on the multivariate spatial data In this paper, we expand the spatial data to time series structure. And then we analyze them on the time space and detect the hotspots. Echelon dendrogram has been made by piling up each multivariate spatial data to bring time spatial data. We perform the structural analysis of temporal spatial data.

• 한국정밀공학회지
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• 제22권8호
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• pp.118-127
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• 2005

A spatial 3 degrees-of-freedom mechanism employing Stewart Platform structure is proposed: the mechanism maintains the 3- RRPS structure of Stewart Platform but has an additional passive PRR serial sub-chain at the center area of the mechanism in order to constrain the output motion of the mechanism within the output motion space of the added PRR serial subchain. The forward and reverse position analyses of the mechanism are performed. Then the mechanism having both the forward and the reverse closed-form solutions is suggested and its closed form solutions are derived. It is confirmed, through the kinematic analysis of those two proposed mechanisms via kinematic isotropic index, that both the proposed mechanisms have fairly good kinematic characteristics compared to the existing spatial 3-DOF mechanisms in literature.

• 한국공간구조학회논문집
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• 제21권1호
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• pp.95-104
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• 2021

As people's living standards and cultural standards have developed, interest in culture and art has increased, and the demand for large space structures where people can enjoy art, music, and sports has increased. As it accommodates a large number of personnel, it is most important to ensure safety of large spatial structures, and can be used as a space where people can evacuate in case of a disaster. Large spatial structures should be prepared for earthquake loads rather than wind loads. In addition to damage to the structure due to earthquakes, there are cases in which it was not utilized as a space for evacuation due to the fall of objects installed on top of the structure. Therefore, in this study, the dome-shaped large spatial structure is generalized and the displacement response according to the number of installations, position and mass is analyzed using a tuned mass damper(TMD) that is representative vibration control device.

• 한국공간구조학회논문집
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• 제23권4호
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• pp.27-34
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• 2023

In this study, the seismic response characteristics of the three analysis model with or without TMD were investigated to find out the effective dome shape. The three analysis models are rib type, lattice type and geodesic type dome structure composed of space frame. The maximum vertical and horizontal displacements were evaluated at 1/4 point of the span by applying the resonance harmonic load and historical earthquake loads (El Centro, Kobe, Northridge earthquakes). The study of the effective TMD installation position for the dome structure shows that seismic response control was effective when eight TMDs were installed in all types of analysis model. The investigation of the efficiency of TMD according to dome shape presents that lattice dome and geodesic dome show excellent control performance, while rib dome shows different control performance depending on the historical seismic loads. Therefore, lattice and geodesic types are desirable for seismic response reduction using TMD compared to rib type.