• 한국공간구조학회논문집
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• 제13권4호
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• pp.57-66
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• 2013

Spatial structures have the different dynamic characteristics from general rahmen structures. Therefore, it is necessary to accurately analyze dynamic characteristics and seismic response for seismic design of spatial structure. Keel arch structure is used as an example structure because it has primary characteristics of spatial structures. In case of spatial structures with different ground condition and time lag, multiple support excitation may be subjected to supports of a keel arch structure. In this study, the response of the keel arch structure under multiple support excitation and with time lag are analyzed by means of the pseudo excitation method. Pseudo excitation method shows that the structural response is divided into two parts, ground displacement and structural dynamic response due to ground motion excitation. It is known that the seismic responses of spatial structure under multiple support excitation are different from those of spatial structure under simple excitation. And the seismic response of spatial structure with time lag are different from those of spatial structure without time lag. Therefore, it has to be necessary to analyze the seismic response of spatial structure under multiple support excitation and time lag because the spatial structure supports may be different and very long span. It is shown that the seismic response of spatial structure under multiple support seismic excitation are different from those of spatial structure under unique excitation.

• 한국공간구조학회논문집
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• 제13권1호
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• pp.113-119
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• 2013

Spatial structures have the different dynamic characteristics from general rahmen structures. Therefore, it is necessary to accurately analyze dynamic characteristics and seismic response of spatial structure for seismic design of spatial structure. An arch structure is used as an example structure because it has primary characteristics of spatial structures. Multiple support excitation may be subjected to supports of a spatial structure because ground condition of spatial structures is different. In this study, the response analysis of the arch structure under multiple support excitation and simple support excitation is studied. By means of the pseudo excitation method, the seismic response is analyzed for long span spatial structure. It shows that the structural response is divided into two parts, ground displacement and structural dynamic response due to ground motion excitation. It is known that the seismic response of spatial structure under multiple support excitation and simple support excitation are the different in some case. Therefore, it has to be necessary to analyze the seismic response of spatial structure under multiple support excitation because the spatial structure supports may be different.

• 한국공간구조학회논문집
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• 제16권4호
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• pp.91-100
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• 2016

A retractable-roof spatial structure is frequently used for a stadium and sports hall. A retractable-roof spatial structure allows natural lighting, ventilation, optimal conditions for grass growth with opened roof. It can also protects users against various weather conditions and give optimal circumstances for different activities. Dynamic characteristics of a retractable-roof spatial structure is changed based on opened or closed roof condition. A tuned mass damper (TMD) is widely used to reduce seismic responses of a structure. When a TMD is properly tuned, its control performance is excellent. Opened or closed roof condition causes dynamic characteristics variation of a retractable-roof spatial structure resulting in off-tuning. This dynamic characteristics variation was investigated. Control performance of a passive TMD and a smart TMD were evaluated under off-tuning condition.

• 한국공간구조학회논문집
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• 제14권4호
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• pp.89-96
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• 2014

Spatial structures as like dome structure have the different dynamic characteristics from general rahmen structures. Therefore, it is necessary to accurately analyze dynamic characteristics and effectively control of seismic response of spatial structure subjected to multi-supported excitation. In this study, star dome structure that is subjected to multi-supported excitation was used as an example spatial structure. The response of the star dome structure under multiple support excitation are analyzed by means of the pseudo excitation method. Pseudo excitation method shows that the structural response is divided into two parts, ground displacement and structural dynamic response due to ground motion excitation. And the application of passive tuned mass damper(TMD) to seismic response control of star dome structures has been investigated. From this numerical analysis, it is shown that the seismic response of spatial structure under multiple support seismic excitation are different from those of spatial structure under unique excitation. And it is reasonable to install TMD to the dominant points of each mode. And it is found that the passive TMD could effectively reduce the seismic responses of dome structure subjected to multi-supported excitation.

• 한국실내디자인학회논문집
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• 제26권6호
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• pp.62-70
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• 2017

This study has a purpose that definitize correlationship of spatial structure and sales strategies in mixed-use complexes which established in Korea since year 2000. For this purpose, this study tries to analysis spatial structure of mixed-use facilities through space syntax theory and makes an typological categorization based on their space composition. As a result of categorization, Korean mixed-use facilities can be classed as three types. First type is integrated stacking type. Second one is parallel connecting type. Third type is room to room type. According to differences between categories, their spatial structures show different meaning with different sales strategies. Integrated stacking type sales luxury brands and expensive stuffs and it also has deep and complicated structure. That means theses spaces usually make a strategy of exclusion. Parallel connecting type sales special categories and it also has shallow and easy spatial structure. That means these facilities want to make a smooth connection between apposed volumes. Room to room type sales cheap and fancy objects and it also has simple and shallow structure. That means simple spatial structure can be lead contact customer to stuffs. These results mean spatial structure have a effect on design of sales space.

• 한국지리정보학회지
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• 제15권3호
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• pp.13-22
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• 2012

기존의 공간구문론(Space Syntax)을 활용한 공간구조분석(Spatial Structure Analysis)은 가로망(road)에 관한 인자(factor)만을 활용하는 한계를 가지고 있기에, 가로망 인자만이 아닌 지역의 지역적 특성을 고려한 인자를 도출한 현실성 있는 공간구조 분석 방법이 필요한 실정이다. 본 연구는 지역의 공간구조 특성인자를 도출하여 기존의 공간구문론과 GIS와의 통합모델을 구축하여 수정형 공간구조분석 방법을 제시하고 합덕읍 일원의 중심지역을 대상으로 공간구조 분석을 수행하는데 목적이 있다. 이를 위해 전문가 설문조사를 실시하여 지역의 공간구조 특성요인 및 상대적 가중치를 도출하였고, 지역적 특성을 반영하는 인자로 가로망 뿐만 아니라 용도지역, 지가, 건물의 밀집도 요인을 도출하였다. 분석 결과 합덕읍의 경우 도로만을 이용한 기존의 공간구조분석을 활용한 공간구조분석 방법이 실제적인 값을 반영하지 못한 것으로 분석되었고, 지역적 특성 인자를 추가하여 분석한 수정형 공간구조분석 결과가 합덕읍의 현실성을 잘 반영한 것으로 나타났다. 즉, 합덕읍과 같은 경우 개발 축에 따라 가로망이 변화되고 중심성이 변화되는 지역이 아니라, 효율성과 형평성에 의해 가로망이 형성되거나 쇠퇴로 인해 중심성이 변화된 지역이기에 이러한 지역의 경우 지역적 특성을 반영한 방법이 더 적합한 것으로 분석되었다. 향후 지역적 특성을 반영한 공간구조분석 인자 선정 및 파라미터 선정에 관한 더 깊은 연구가 필요하고 다른 지역을 대상으로 시뮬레이션하여, 모델에 대한 상호 검증 및 보완하는 과정이 필요할 것이다.

• 한국공간구조학회논문집
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• 제15권4호
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• pp.107-114
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• 2015

Large spatial structures can not easily predict the dynamic behavior due to the lack of construction and design practices. The spatial structures are generally analyzed through the numerical simulation and experimental test in order to investigate the seismic response of large spatial structures. In the case of analysis for seismic response of large spatial structure, the many studies by the numerical analysis was carried out, researches by the shaking table test are very rare. In this study, a shaking table test of a small-scale arch structure was conducted and the dynamic characteristics of arch structure are analyzed. And the dynamic characteristics of arch structures are investigated according to the various column cross-section and length. It is found that the natural vibration periods of the small-scaled arch structure that have large column stiffness are very similar to the natural vibration period of the non-column arch structure. And in case of arch structure with large column stiffness, primary natural frequency period by numerical analysis is very similar to the primary natural frequency period of by shaking table test. These are because the dynamic characteristics of the roof structure are affected by the column stiffness of the spatial structure.

• 한국공간구조학회논문집
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• 제17권3호
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• pp.107-115
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• 2017

In this paper, a structural design method of a smart tuned mass damper (TMD) for a retractable-roof spatial structure under earthquake excitation was proposed. For this purpose, a retractable-roof spatial structure was simplified to a single degree of freedom (SDOF) model. Dynamic characteristics of a retractable-roof spatial structure is changed based on opened or closed roof condition. This condition was considered in the numerical simulation. A magnetorheological (MR) damper was used to compose a smart TMD and a displacement based ground-hook control algorithm was used to control the smart TMD. The control effectiveness of a smart TMD under harmonic and earthquake excitation were evaluated in comparison with a conventional passive TMD. The vibration control robustness of a smart TMD and a passive TMD were compared along with the variation of natural period of a simplified structure. Dynamic responses of a smart TMD and passive TMD under resonant harmonic excitation and earthquake load were compared by varying mass ratio of TMD to total mass of the simplified structure. The design procedure proposed in this study is expected to be used for preliminary design of a smart TMD for a retractable-roof spatial structure.

• 한국강구조학회 논문집
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• 제25권4호
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• pp.399-407
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• 2013

장경간의 대공간구조물은 지진하중에 의하여 일반구조물과는 다른 응답특성이 나타나고 있으므로 대공간구조물에 대한 내진설계를 위해서는 대공간구조물의 동적특성 및 지진응답특성에 대한 정확한 분석이 필요하다. 본 논문에서는 예제 구조물로 대공간구조물의 동적특성을 기본적으로 내재하고 있는 장견간의 아치구조물로 선정하여 다중지점 지진하중이 가진되는 대공간구조물의 진동응답 특성을 분석하였다. 다중지점 지진하중은 대공간구조물의 지점 지반조건이 다른 경우 그리고 시간지연을 갖는 지진하중이 가진되는 경우로 하여 수치해석을 수행하였다. 다중지점 지진하중 적용한 경우의 지진응답이 단일 지진하중 적용에 의한 지진응답과 비교하여 경우에 따라서 상이한 지진응답을 나타내고 있다. 따라서 대공간구조물의 경우에 정확한 지진응답 분석 및 적절한 내진설계를 위해서는 다중지점 지진하중을 적용하여 지진응답을 분석하는 것 바람직하다.

• 한국공간구조학회논문집
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• 제9권1호
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• pp.79-85
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• 2009

최근의 대공간구조물은 장스팬화 됨은 물론이고 경량화되면서 면외 방향의 강성이 매우 작아지고 있다. 이로 인하여 공력불안정 진동의 발생 여부는 물론이고 연성구조물의 판단시에도 고유진동수의 정확한 산정이 필요하다. 그러나 국내외 대공간구조물의 고유진동수 제안식에 대한 연구는 매우 미흡한 실정이다. 따라서 국내 7개 공간구조물의 고유치해석에서 얻은 근사식을 일본건축학회 고유치해석에 근거한 2가지 제안식과 일본의 28개 공간구조물의 계측치에서 얻은 고유진동수 근사식을 비교하였다. 지붕의 고유진동수는 스팬이 증가함에 따라서 작아지는 경향을 확인하였다. 국내의 고유진동수 값은 전반적으로 일본의 공간구조물의 해석과 계측에 근거한 고유진동수보다 동일한 스팬에서 작은 경향을 보임을 알 수 있었다. 따라서 국내 공간구조물의 지붕은 일본의 경우보다 비교적 연성구조물인 것을 확인할 수 있다.