• Title/Summary/Keyword: 저층 건물 지붕

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Characteristics of Peak External Pressure Acting on the Roof and Wall of the Low-Rise Buildings with Gable Roofs (박공지붕형 저층건축물의 지붕 및 벽면에 작용하는 피크외압의 분포 특성)

  • Jo, Won Geun;Won, Jong Ho;Ha, Young Cheol
    • Journal of Korean Society of Steel Construction
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    • v.21 no.3
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    • pp.245-255
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    • 2009
  • The low-rise buildings with gable roofs are commonly used in a number of industries. In order to study the characteristics of peak external pressure coefficient on low-rise buildings with gable roofs, wind-tunnel test have been carried out. Wind-induced pressures were measured simultaneously at many points on wind-pressure models, typical of simple low-rise buildings with gable roofs, which have seven different roof slope with constant width(D), height(H), and length(D). The pressure measurements were made in one kind of turbulent boundary layer, which simulated the natural winds over typical suburban terrains at a geometric scale of 1/150. The results indicate that peak external pressure coefficient on the roof and wall edges were increased. The results compared with wind standard of KBC-2005 and standards of various nations. The comparative resultant, experimental result appeared very similar at AIJ-2004. But the results were somewhat larger then wind standard of KBC-2005.

An Experimental Study for the Structure of Conical Vortex at the Low-Rise Building Roof by using a PIV Technique (PIV기법을 이용한 저층 건물 지붕에서 발생되는 원추형 와의 구조에 대한 실험적 연구)

  • Ji, Ho-Seong;Jeong, Eun-Ho;Kim, Kyung-Chun
    • Proceedings of the KSME Conference
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    • 2000.04b
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    • pp.667-672
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    • 2000
  • The Characteristics of the conical vortices on the roof surface of a low-rise building has been investigated by using a PIV(Particle Image Velocimerty) technique. The scaled model of TTU building with 1:92 scaling ratio was used. The Reynolds number based on the free stream velocity and the length of the model was $1.96{\times}10^5$. When the angle of attack for the building model is $45^{\circ}$, the conical vortices are occurred symmetrically and the center of vortices are changed with respect to the angle of the approaching flow. The rotating direction of the conical vortices found to be counter-rotating. The secondary vortex motions are investigated using the instantaneous flow field data.

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Analysis of the Characteristics of Wind Pressure Coefficient Working on Monosloped Roof Surface (편지붕형 지붕면에 작용하는 풍압계수 특성분석)

  • You, Ki-Pyo;Cho, Seul-Gi;Kim, Young-Moon
    • Journal of Korean Association for Spatial Structures
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    • v.9 no.4
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    • pp.81-88
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    • 2009
  • Damage on low?rise buildings caused by typhoons and storms is increasing every year. Thus, this study examined the distribution of wind pressure coefficient at each position according to the height of monosloped roof, and measured wind pressure coefficient according to tributary area and compared it with the current wind load standard. We analyzed six areas in order to analyze characteristics at each position of a half span roof, and found that the wind pressure coefficient was around 25% higher at the high comer (HC) than at the low corner (LC). The distribution pattern of peak pressure coefficient at each position was the same as the AIK load standard, but in the results of our experiment, wind pressure was around 40% lower than the load standard at HC and around 37% higher than the load standard at LC.

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3D Boundary Extraction of A Building Using Terrestrial Laser Scanner (지상라이다를 이용한 건축물의 3차원 경계 추출)

  • Lee, In-Su
    • Spatial Information Research
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    • v.15 no.1
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    • pp.53-65
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    • 2007
  • Terrestrial laser scanner provides highly accurate, 3D images and by sweeping a laser beam over a scene or object, the laser scanner is able to record millions of 3D points' coordinates in a short period, so becoming distinguished in various application fields as one of the representative surveying instruments. This study deals with 3D building boundary extraction using Terrestrial Laser Scanner. The results shows that high accuracy 3D coordinates for building boundaries are possibly acquired fast, but terrestrial laser scanner is a ground-based system, so "no roofs", and "no lower part of building" due to trees and electric-poles, etc. It is expected that the combination of total station, terrestrial laser scanner, airborne laser scanner with aerial photogrammetry will contribute to the acquisition of an effective 3D spatial information.

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