• 한국지반신소재학회논문집
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• 제18권4호
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• pp.139-149
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• 2019

옹벽 설계에서는 차량하중에 의해 유발되는 수평토압을 등가상재하중 높이를 토대로 계산한다. 미국 AASHTO의 LRFD 설계 기준은 미국 표준트럭을 대상으로 선정되었기 때문에 국내의 표준트럭과 부합하는 새로운 등가상재하중 높이를 산정 할 필요가 있다. 본 연구에서는 미국 표준트럭과 다른 국내 표준트럭의 특성을 반영하고 차량주행방향, 포장층의 포아송비, 옹벽높이를 고려하여 Boussinesq 이론에 근거한 국내 등가상재하중 높이를 제안하였다. 국내 표준트럭의 축하중과 하중 밀도가 미국 표준트럭보다 높기 때문에, 본 연구에서는 제안한 등가상재하중 높이는 미국 설계 기준에 제안된 등가상재하중 높이 보다 큰 것을 확인하였다. 가장 높은 등가상재하중 높이는 차량주행방향이 옹벽길이방향과 직교할 때로 확인되었다.

• 한국조경학회지
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• 제22권3호
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• pp.105-120
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• 1994

The major purpose of this study is to suggest a comprehensive and systematic process for the preservation and management of urban skylines. The city of Seoul has been selected as a case study for this process. The results of this study are summarized as follows; 1) An urban landscape masterplan needs to be established before the preparation of the preservation and management plan for urban skylines. 2) Preservation and management plans for urban skylines are suggested in the case Mt. Nam, Han River, Mt. Kwanak in Seoul city. In the case of Mt. Nam and Mt. Kwanak, the control of building heights and guidelines for building height have been studied. For the Han River, various alternatives in building height and disposition have been investigated for the enhancement of the visual quality. 3) Two major steps are suggested for the effective preservation and management of urban skylines. The first step is to prepare an urban landscape masterplan for the whole city, to delineate the skyline preservation area, and to fix controls on building heights in the area. The second step is to divide the whole city into landscape units, to make detailed landscape masterplan for each the units, and to fix controls on building heights in the units. However, only the first step will be necessary in a small city.

• 신재생에너지
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• 제5권4호
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• pp.21-27
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• 2009

Potential yield of micro wind turbine on the roof of urban high rise buildings is estimated. Urban wind profile is modeled as logarithmic profile above the mean building height with roughness length 0.8, displacement 7.5 m. Mean wind velocity from the meteorological agency data at the hight of 50m is used. Wind velocity changes are simulated on the rectangular roof of 26, 45, 53 degree pitch and the circular roof by computational fluid dynamics and RNG k-$\varepsilon$ turbulence models. Wind velocity increased approximately by a factor of the order of 270 % on the 26 degree pitched roof. In the 100 m and 200 m high buildings, wind enhancement is greater at the front side than at the center of the building. In the building arrangement model wind velocity changes abruptly and it becomes wind gusts. When commercial wind turbines are installed on the building roof, average power and annual power generation enhanced by 3~4 times than normal wind velocity at 50m and 6 kw wind turbine can generate 1053 kwh per month on the 26 degree pitched roof at 50m height and sufficiently supply electrical power with 15 household for common electrical use and food waste disposer. However, power output will vary significantly by the wind conditions in the order of $\pm$ 20 %.

• KIEAE Journal
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• 제10권4호
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• pp.117-122
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• 2010

In these days numerous super tall buildings are under construction or being planned in Middle East and Asian countries. Some of them are planned as an ultra high-rise building that goes over 600m tall, including Burj Khalifa, the tallest building in the world. External environment such as wind speed, temperature and humidity of the super tall building varies due to its vertical height. Therefore, it is necessary to consider these environmental changes to estimate building heating and cooling load. This paper analyzes how vertical microclimate difference affects building heating and cooling load in super tall building by simulation using radiosonde climate data. Besides, the correlation between air-tightness of building envelope and building load was analyzed for a super tall building.

• Earthquakes and Structures
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• 제11권5호
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• pp.741-777
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• 2016

A simplified approach of assessing torsionally balanced (TB) and torsionally unbalanced (TU) low-medium rise buildings of up to 30 m in height is presented in this paper for regions of low-to-moderate seismicity. The Generalised Force Method of Analysis for TB buildings which is illustrated in the early part of the paper involves calculation of the deflection profile of the building in a 2D analysis in order that a capacity diagram can be constructed to intercept with the acceleration-displacement response spectrum diagram representing seismic actions. This approach of calculation on the planar model of a building which involves applying lateral forces to the building (waiving away the need of a dynamic analysis and yet obtaining similar results) has been adapted for determining the deflection behaviour of a TU building in the later part of the paper. Another key original contribution to knowledge is taking into account the strong dependence of the torsional response behaviour of the building on the periodic properties of the applied excitations in relation to the natural periods of vibration of the building. Many of the trends presented are not reflected in provisions of major codes of practices for the seismic design of buildings. The deflection behaviour of the building in response to displacement controlled (DC) excitations is in stark contrast to behaviour in acceleration controlled (AC), or velocity controlled (VC), conditions, and is much easier to generalise. Although DC conditions are rare with buildings not exceeding 30 m in height displacement estimates based on such conditions can be taken as upper bound estimates in order that a conservative prediction of the displacement profile at the edge of a TU building can be obtained conveniently by the use of a constant amplification factor to scale results from planar analysis.

• 한국환경기술학회지
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• 제19권6호
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• pp.528-535
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• 2018

본 연구에서는 전산유체역학(CFD) 모델을 이용하여, 건물 외관비에 따른 건물협곡에서의 소용돌이 현상을 재현하고 정량적인 해석을 시도하였다. 이를 위하여 건물협곡의 폭(W)을 기준으로 건물의 길이(L) 및 높이(H) 증가에 따른 민감도 실험을 수행하였으며, 건물협곡에서의 바람 벡터장과 2차 역회전 소용돌이의 형성 등을 분석하였다. 수평소용돌이의 경우에는 건물의 길이 증가에 따라 성장하다가 L/W=2.5부터 건물협곡의 중앙부에서 벡터의 크기 약화 및 방향 변화 등의 조짐이 보이기 시작하였고, L/W=3.0 이상에서 흐름이 분리되어 1차 소용돌이는 약화되고 건물협곡의 안쪽에서 2차 역회전 소용돌이가 형성되었다. 연직소용돌이의 경우에는 건물의 높이 증가에 따라 성장하다가 H/W=2.5부터 건물협곡의 하부에서 벡터의 방향전환 현상이 나타나기 시작하였고, H/W=3.5 이상의 조건에서 1차 소용돌이는 약화되고 2차 역회전 소용돌이가 형성되었다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 춘계 학술논문 발표대회
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• pp.49-50
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• 2019

In the case of High-rise buildings, it has a problem by stack effect that rise of vertical height. Especially in case of fire, it need to the consideration of stack effect that it has bigger than general. Therefore in this study, we used to the Contamw and FDS simulation for analysis of stack effect and pressure distribution characteristic in fire. As a result the Contamw simulation shows the pressure distribution by stack effect in general high-rise buildings. However, in case of fire, the height of the neutral plane is lowered and stack effect is larger. Therefore, it is necessary to multiply analyze the temperature distribution and the stack effect in fire.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 1998년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Spring 1998
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• pp.20-27
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• 1998

In the current seismic design codes design earthquake is usually defined as the earthquake with the 90 percent probability of not being exceeded in the life time of a structure which is assumed as 50 years equivalent to the earthquake with 475 year recurrence period. However the life time of tall building structures may be much longer than 50 yers. The current seismic design code requires the modal analysis or dynamic time history analysis for the buildings with the height exceeding a certain height limit. The objective of this study is to collect the earthquake ground motion(EQGM) which can be used for dynamic time history analysis for tall buildings. For this purpose linear elastic design response spectrum (LEDRS) in the code is scaled to account for the recurrence period of the design earthquake. The earthquake ground motions which has been recorded are calibrated to fit the scaled LEDRS. The set of calibrated EQGM can be treated as design EQGM for the design of tall building with longer lifetime than ordinary building.

• 대한건축학회논문집:계획계
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• 제35권10호
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• pp.41-52
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• 2019

The purpose of this study was to analyze the historical development of high-rise buildings-promoting policies in Seoul in terms of modern urban redevelopment. The results of this study were as follows; The maximum height of the buildings has been limited by National codes since 1934. But at the same time, Seoul Metropolitan government had limited the minimum building floors of roadside buildings through local regulations after the Korean War. The high-rise city had been regarded as a means of beautifying Seoul for a long time. However since the 2000s, the minimum height limit for buildings was removed from local regulations and the concept of high-rise restrictions was no longer significant as before.

• 대한원격탐사학회지
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• 제29권4호
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• pp.361-373
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• 2013

공간해상도 약 1 m의 고해상도 X-band SAR 위성이 이용되면서 SAR를 이용한 도심지 모니터링, 표적탐지, 건물 재구성에 관한 연구가 진행되고 있다. 본 연구에서는 고해상도 TerraSAR-X SAR 영상을 이용한 도심지 건물 재구성을 수행하였다. 도심지 건물 재구성을 위하여 1:25,000 수치지형도로부터 건물의 외곽선을 추출하였으며, 추출한 건물의 외곽선을 기반으로 SAR 영상에서 모서리반사 위치를 찾았다. KS 테스트(Kolmogorov-Smirnov Test)에 기반하여 고해상도 SAR 진폭영상의 건물 모서리반사 위치로부터 레이오버 길이를 측정하여 건물의 초기 높이를 설정하였다. 진폭영상을 이용하여 추출한 건물의 초기 높이 기준 -10 m에서 +10 m로 건물의 높이를 변화시키며 도심지에 적합한 간섭위상 시뮬레이션을 수행하여 TerraSAR-X 간섭위상과의 위상 일치성 계산을 하였다. 위상 일치의 경향성 분석을 통해 건물의 높이를 설정해 줌으로써 고해상도 SAR 영상을 이용한 도심지 건물 재구성 연구를 진행하였다. 대전지역의 아파트 단지에 적용한 결과, 진폭영상과 간섭위상을 이용하여 추정된 건물 높이는 LiDAR로부터 추출된 높이를 기준으로 약 1~2 m 정도의 RMSE (Root Mean Square Error)를 보였다. 개발된 알고리즘은 향후 TerraSAR-X와 TanDEM-X 간섭쌍 자료에 적용할 경우, 보다 도심지 모니터링에 효과적으로 이용될 수 있을 것이다.