• KIEAE Journal
• /
• 제11권5호
• /
• pp.31-42
• /
• 2011

This study aimed at exploring the cultural ways to develope the under-space of overpass in the downtown area which has been considered as a dead, unhealthy place. The study process consists of 4 methodological stages. literature review, case study on environmental design of under-space of overpass, questionnaire and statistical analysis and specific study on regional context were conducted to understand the problems of the space and the needs of the community and visitors. The final suggestion based on the research are the natural rest settings including pocket parks with trees and fountain as well as cultural settings with small sized outdoor gallery and open performance stage which can be managed by the community members. The findings of this study would help the dead space in the center of the city regenerate the community in terms of physical, cultural and social environments. Also, this study will show the importance and the methodological approach of the research for the development of the hidden potential space of the city.

• 교통기술과정책
• /
• 제12권3호
• /
• pp.49-57
• /
• 2015

• 한국구조물진단유지관리공학회 논문집
• /
• 제15권2호
• /
• pp.51-60
• /
• 2011

본 연구에서는 환경적인 요인으로 인한 성능저하현상으로 내구성 저하가 예상되는 건대-구의간 고가교의 현재 상태를 분석하고 내구성 저하로 인한 내구연한의 감소를 막기 위하여 고가교 구조물의 경량화를 통한 성능개선을 수행하고자 한다. 경량화 작업은 콘크리트 방음벽을 경량재 방음벽으로, 도상을 자갈도상에서 콘크리트 도상으로, 마지막으로 트라프를 경량화 함으로써 고가교 전체의 경량화를 유도한다. 이러한 고가교 경량화에 따른 정적 및 동적 거동 변화와 성능개선 효과를 분석하고, PSC I 형교 구간의 내하율 증진에 의한 구조안전성을 확인한다. 경량화 결과 구조물의 처짐이 2.6mm가 감소하고 1.07MPa의 인장응력이 감소된 것으로 평가되어 대상 구조물의 구조성능이 효과적으로 개선되었음을 알 수 있다. 고유진동수도 경량화에 따라 약 30% 증가하여 진동이 감소하고 동적거동이 향상되었다. 또한, 해석 및 계측 결과를 근거로 하여 대상교량의 내하력을 평가한 결과, 경량화에 따라 내하율이 1.82에서 1.93으로 증가하여 경량화에 따른 성능개선 효과가 우수한 것으로 판명되었다.

• 한국강구조학회 논문집
• /
• 제10권4호통권37호
• /
• pp.565-575
• /
• 1998

본 연구는 가 지지점을 이용한 프리스트레스된 강재 라멘식 보도육교를 설계하고 시공하는 전반적인 과정을 제시하였다. 설계의 자동화를 위하여 전산 프로그램을 개발하였으며 지간별로 매개변수 연구를 수행하여 적절한 단면을 제시하였고 이를 기존의 강재 단순보형 보도육교와 형고 및 강재량 면에서 비교하였다. 지간장 $20{\sim}45m$에 대한 연구결과, 주형고의 경우에는 $26{\sim}48%$, 강재량의 경우에는 $25{\sim}34%$의 재료 절감 효과를 나타내었으며. 지간장이 클수록 절감 효과가 큰 것으로 분석되었다.

• Earthquakes and Structures
• /
• 제12권3호
• /
• pp.375-388
• /
• 2017

Prior to modern seismic provisions, several bridges were not designed for seismic actions in moderate seismic areas. Precast multi-girder and slab bridges are typical highway overpass structures; they have a significant contribution to national bridge stocks. Since the seismic behavior is questionable, a preliminary parametric study is conducted to determine critical configurations and components. The results indicate that the behavior of the abutments, backfill soil, superstructure and foundation is normally satisfactory; however, the superstructure-abutment joints are critical for both single- and multi-span bridges, while the piers are also critical for longer multi-span configurations. The parametric results provide a solid basis both for detailed seismic assessment and development of design concepts of newly built structures in moderate seismic zones.

• Earthquakes and Structures
• /
• 제9권6호
• /
• pp.1153-1179
• /
• 2015

This paper focuses on presenting modeling considerations and insight into the performance of typical straight, curved, and skewed box-girder bridges in California which form the bulk of the bridge inventory in the state. Three case study bridges are chosen: Meloland Road Overpass, Northwest Connector of Interstate 10/215 Interchange, and Painter Street Overpass, having straight, curved, and skewed superstructures, respectively. The efficacy of nonlinear dynamic analysis is established by comparing the response from analytical models to the recorded strong motion data. Finally insights are provided on the component behavioral characteristics and shift in vulnerability for each of the bridge types considered.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2008년도 춘계학술대회 논문집
• /
• pp.194-198
• /
• 2008

The necessities of development of foundation having minimized occupying area and construction time are required for overpass in the downtown area by which bimodal tram will pass a crossway. We are studying a single column drilled pier foundation which is continuous from pier to pile foundation. Due to the increased resisting moment by reinforced steel which is ranged from the upper part of pile to lower part of column above ground, it can be possible to make a smaller pile-section and lessen the bar reinforcing. And for the excavation work is possible with smaller equipment, this foundation has a improved constructability and economical efficiency. This foundation needs smaller amount of concrete and has a small self-weight. It has an effect on improving resistance against earthquake due to improved ductility in addition to improved rigidity by interaction between concrete and steel.

• 환경영향평가
• /
• 제21권1호
• /
• pp.209-218
• /
• 2012

In this study, suitable types and measures of Wildlife Crossing Structures (WCS) for mammals of Korea were analyzed to suggest basic information for design guidelines of WCS. In order to find the types and measures, we conducted field surveys on 79 WCS and literature reviews on 159 WCS. The results of our study were as follows; Small-medium sized carnivores usually use all measures of wildlife underpass, meanwhile large sized herbivores as water deer need lager measures than 0.7 Openness Index(OI). Furthermore, we found that wildlife overpasses were usually used at the measure of 6.8 m width by every mammal. Therefore, we concluded that the proper measures should be lager than 0.7 OI for underpass and 7 m width for overpass.

• 콘크리트학회지
• /
• 제22권1호
• /
• pp.59-64
• /
• 2010

• Architectural research
• /
• 제21권2호
• /
• pp.31-39
• /
• 2019

Inspired by the success of the High-line project in New York, The Seoul Metropolitan Government launched a project to convert an overpass near Seoul station into a pedestrian park. Seoullo 7017 went through instant success after its opening in May 2017; however, there is a continuous controversy over its long-term impact as shown in the exemplary cases like the High-line project. This study aims for quantitative investigation through the comparative analysis between Seoullo 7017 and the High-Line in the perspectives of spatial configuration. Space Syntax was chosen as the analysis method for this research. Integration (3) in Space Syntax is known to have a high correlation with pedestrian volume; thus, by using this method, spatial structure was analyzed by comparing the statistically verified results of changes in the spatial structure of the Highline with those in Seoul. The results indicated that the influence of Seoullo 7017 was less than that of the High-line in terms of spatial configuration. The reason for this difference is spatial configuration between Manhattan and Seoul. The High-line is located in Manhattan which has an urban grid structure, whereas Seoul has non-geometric urban structure, the neighborhood unit in Korea. Also the center of the overpass isn't connected well with its surroundings.