초고층 건축물의 기하학적 형상에 따른 풍진동응답 (Wind-Excited Motions of Tall Buildings with Geometrical Shapes)

서지정보

· 발행기관 : 대한건축학회
· 수록지 정보 : 대한건축학회논문집 구조계 / 25권 / 6호 / 21 ~ 32페이지
· 저자명 : 조강표, 이옥진

초록

Modern tall buildings having multiplex functions are increasing in height for the powerful use of city land by the development
of construction skills and the progress of structural analysis techniques. However, those tall buildings are very slender and
vulnerable to lateral forces such as wind load because the height of a tall building is much larger than its width. Wind-induced
responses of buildings are different according to the geometry of buildings, which have possible dynamic effects by wind, flexible
and slender tall buildings, structural characteristics and turbulent characteristics of wind. In the paper, square, equilateral
triangular and circular sections were selected as basic plane shapes of buildings, and wind-induced vibration experiments were
performed in a boundary layer wind tunnel for the very slender case with the ratio of section and height (aspect ratio, H/√A)
of six for each section. Also, the setback and tapering were tried to suggest an aerodynamically favorable shape for the circular
section. The experiment results are in the form of response lissajous, response with reduced response with reduced wind velocity.
Comparing the reponses by each basic shape, the response of displacement by wind velocity was the first largest for the
equilateral triangular section, the second largest for the square section, and the third largest for the circular section. Also,
investigating aerodynamically favorable shapes for the circular section, it was found that the response amplitude for the setback
was much less than the tapering.

영어초록

Modern tall buildings having multiplex functions are increasing in height for the powerful use of city land by the development
of construction skills and the progress of structural analysis techniques. However, those tall buildings are very slender and
vulnerable to lateral forces such as wind load because the height of a tall building is much larger than its width. Wind-induced
responses of buildings are different according to the geometry of buildings, which have possible dynamic effects by wind, flexible
and slender tall buildings, structural characteristics and turbulent characteristics of wind. In the paper, square, equilateral
triangular and circular sections were selected as basic plane shapes of buildings, and wind-induced vibration experiments were
performed in a boundary layer wind tunnel for the very slender case with the ratio of section and height (aspect ratio, H/√A)
of six for each section. Also, the setback and tapering were tried to suggest an aerodynamically favorable shape for the circular
section. The experiment results are in the form of response lissajous, response with reduced response with reduced wind velocity.
Comparing the reponses by each basic shape, the response of displacement by wind velocity was the first largest for the
equilateral triangular section, the second largest for the square section, and the third largest for the circular section. Also,
investigating aerodynamically favorable shapes for the circular section, it was found that the response amplitude for the setback
was much less than the tapering.

참고자료

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