• 한국공간구조학회논문집
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• 제19권1호
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• pp.75-82
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• 2019

In the precedent study, the retractable-roof spatial structure was selected as the analytical model and a tuned mass damper (TMD) was installed to control the dynamic response for the earthquake loads. Also, it is analyzed that the installation location of TMD in the analytical model and the optimal number of installations. A single TMD mass installed in the analytical model was set up 1% of the mass of the whole structure, and the optimum installation location was derived according to the number of change. As a result, it was verified that most effective to install eight TMDs regardless of opening or closing. Thus, in this study, eight TMDs were installed in the retractable-roof spatial structure and the optimum mass ratio was inquired while reducing a single TMD. In addition, the optimum mass distribution ratio was identified by redistributing the TMD masses differently depending on the installation position, using the mass ratio of vibration control being the most effective for seismic load. From the analysis results, as it is possible to confirm the optimum mass distribution ratio according to the optimum mass ratio and installation location of the TMD in the the retractable-roof spatial structure, it can be used as a reference in the TMD design for large space structure.

• 대한공간정보학회지
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• 제17권3호
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• pp.41-48
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• 2009

본 연구는 성장과정에서 나타나고 있는 공간적 확산 집중의 특성과 도시공간구조 변화를 측정하는데 목적을 두고 있다. 분석에 사용된 자료는 도시인구, 고용, 개발연면적, 지가를 이용하였다. 분석시기는 1995년이후 10년간으로 1995년, 2000년, 2005년을 기준으로 하였다. 연구방법은 먼저 도시성장 변화를 측정하기 위하여 중심점 이동과 표준편차거리를 산출하였다. 모란지수(Moran's I)분석결과 분산된 형태보다는 전반적으로 집중된 형태를 보이고 있었으나, 그 수준은 다소 미약하게 나타났다. 앞으로 시가화지역에서는 토지이용 등의 계획적인 도시관리가 요구된다고 볼 수 있다. 다음으로 윤곽도로 볼 때, 대체적으로 단핵구조에서 다핵화로 변화된 모습을 보이고 있다. 다만 중심지간에 상호연계축 발달은 미약하였다.

• 한국농촌건축학회논문집
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• 제1권1호
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• pp.115-127
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• 1999

The rural houses in Tonghae have a different spatial structure from those of the other area because of the characteristics of a regional circumstances between the Taebaek mountains and the East Sea. The purpose of this study is aimed at grasping how the spatial transformations of the rural houses according to the changes of the housing lifestyles by the modernization and urbanization are coped with and changed. This study consists of understanding the trend of change of the rural houses in Tonghae through the analysis of living elements and the spatial transformation and process of the rural houses in Tonghae since 50's on the basis of the use change, extension and renovation of residential space.

• 한국공간구조학회논문집
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• 제10권1호
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• pp.95-102
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• 2010

공간구조물은 일반 라멘구조와는 다른 동적특성을 가지고 있으며 이런 동적특성에 관해 많은 연구가 수행되고 있다. 그러나 대부분의 연구는 특정 형태의 공간구조물에 대해 수행되었으며 내진설계를 위해 직접적으로 이용 가능한 연구결과는 매우 제한적이다. 본 연구에서는 공간구조물의 기본적인 동적특성을 내재한 트러스-아치구조물을 대상으로 양단의 기둥의 길이가 다른 경우에 트러스 아치구조물의 지진응답변화를 분석하고자 한다. 양단 기둥 길이의 차이에 따라 가속도 응답이 수평방향에 비해 수직방향에서 더 많은 영향을 받는다. 따라서 상부구조물을 지지하는 하부구조물의 강성이 다른 경우에 공간구조물의 내전설계에 있어서 수직방향 응답에 대한 고려가 더욱 많이 요구된다.

• 한국공간구조학회논문집
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• 제10권3호
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• pp.81-90
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• 2010

대공간구조물은 일반 라멘구조와는 다른 동적특성을 가지고 있으며, 이런 동적특성에 관해 많은 연구가 수행되고 있다. 그러나 대부분의 연구는 특정 형태의 대공간구조물에 대해 수행되었으며, 내진설계를 위해 직접적으로 이용 가능한 연구결과는 매우 제한적이다. 본 연구에서는 대공간구조물의 기본적인 동적특성을 내재한 트러스-아치구조물을 대상으로 양단의 기둥의 길이가 다른 경우에 트러스-아치구조물의 지진응답변화를 분석하고자 한다. 양단 기둥 길이의 차이에 따라, 가속도 응답이 수평방향에 비해 수직방향에서 더 많은 영향을 받는다. 따라서 상부구조물을 지지하는 하부구조물의 강성이 다른 경우에 대공간구조물의 내진설계에 있어서 수직방향 응답에 대한 고려가 더욱 많이 요구된다.

• 한국공간구조학회논문집
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• 제20권3호
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• pp.107-116
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• 2020

In this paper, the displacement response to seismic loads was analyzed after installing TMD in spatial structures and high-rise buildings. In the case of a spatial structures, since it exhibits complex dynamic behavior under the influence of various vibration modes, it is not possible to effectively control the seismic response by installing only one TMD, unlike ordinary structures. Therefore, after installing eight TMDs in the structure, the correlation between displacement response and mass ratio was examined while changing the mass. The TMD must be designed to have the same frequency as the structure frequency so that the maximum response reduction effect can be exhibited. It can be confirmed that the most important variable is to select the optimal TMD mass in order to install the TMD on the structure and secure excellent control performance against the earthquake load. As a result of analyzing the TMD mass ratio, in the case of high-rise buildings, a mass ratio of 0.4% to 0.6% is preferable. In spatial structures, it is desirable to select a mass ratio of 0.1% to 0.2%. Because this study is based on the theoretical study based on numerical analysis, in order to design a TMD for a real structure, it is necessary to select within a range that does not affect the safety of the structure.

• 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.

• 대한지리학회지
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• 제37권
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• pp.33-47
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• 1988

• 디지털융복합연구
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• 제15권1호
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• pp.11-22
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• 2017

본 연구의 목적은 고령화에 따른 공간변화의 대응방안을 제시하는 것이다. 본 연구의 목적을 달성하기 위해 연구의 방법은 문헌조사 방법을 활용하고, 분석에 있어서는 인구 통계자료를 비교 분석한다. 따라서 본 연구에서는 정치경제학적 공간개념을 바탕으로 고령화와 공간의 현황 및 문제점을 파악하였고, 다음과 같은 5가지의 대응방안을 제시하였다. 첫째, 고령인구격차를 고려한 공간계획 수립, 둘째, 합계출산율 증가와 인구 흡입요인 강화, 셋째, 고령자의 생산활동 참여 증가로 공간의 경제 활력 증대, 넷째, 초고령 도시공간에 대한 지역개발계획 수립 및 시행, 다섯째, 고령화의 공간적 격차 심화에 대비한 공간정책의 전환이 필요하다. 결론적으로 고령화 속도를 늦추면서 동시에 관련 공간정책과 계획들이 미스매칭되지 않도록 공간정책과 계획의 전환이 필요함을 제시하였다. 본 연구는 고령화율이 급격히 증가하고 있는 지역에 대한 공간계획 수립에 기여할 것으로 기대된다.

• 한국지진공학회논문집
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• 제25권5호
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• pp.223-232
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• 2021

The spatial variation characteristics of seismic motions at the nuclear power plant's site and structures were analyzed using earthquake records obtained at the Fukushima nuclear power plant during the Great East Japan Earthquake. The ground responses amplified as they approached the soil surface from the lower rock surface, and the amplification occurred intensively at about 50 m near the ground. Due to the soil layer's nonlinear characteristics caused by the strong seismic motion, the ground's natural frequency derived from the response spectrum ratio appeared to be smaller than that calculated from the shear wave velocity profile. The spatial variation of the peak ground acceleration at the ground surface of the power plant site showed a significant difference of about 0.6 g at the maximum. As a result of comparing the response spectrums at the basement of the structure with the design response spectrum, there was a large variability by each power plant unit. The difference was more significant in the Fukushima Daiichi site record, which showed larger peak ground acceleration at the surface. The earthquake motions input to the basement of the structure amplified according to the structure's height. The natural frequency obtained from the recorded results was lower than that indicated in the previous research. Also, the floor response spectrum change according to the location at the same height was investigated. The vertical response on the foundation surface showed a significant difference in spectral acceleration depending on the location. The amplified response in the structure showed a different variability depending on the type of structure and the target frequency.