한국전산구조공학회논문집 (Journal of the Computational Structural Engineering Institute of Korea)

  • 제27권4호
  • /
  • Pages.223-230
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  • 2014
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  • 1229-3059(pISSN)
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  • 2287-2302(eISSN)
한국전산구조공학회 (Computational Structural Engineering Institute of Korea)
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FSI 해석에 의한 비정형 초고층 빌딩의 풍응답 특성에 관한 연구

A Study on the Wind-Induced Response Characteristics of Freeform Shaped Tall Building using FSI Analysis

  • 투고 : 2014.07.04
  • 심사 : 2014.07.30
  • 발행 : 2014.08.30
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초록

본 논문에서는 FSI해석을 이용하여 비정형 초고층 빌딩의 풍응답 특성을 연구하였다. 해석모델은 Twist모델이며, 뒤틀림 각도와 풍가속도의 상관관계에 대해 연구 중점을 두었다. 먼저 단방향 해석을 수행하여 100년 재현주기 풍속에 대한 최대 횡 변위를 구하고, 제한조건을 만족하는 탄성계수를 산출한다. 그리고 양방향 해석을 수행, 시간이력해석을 통해 산출된 탄성계수와 임의의 밀도를 가지는 풍가속도를 예측하게 된다. 정방형 모델은 높이 400m, 변장비 1:1, 세장비 8로 설정, 뒤틀림 모델은 0도에서 90도까지 15도 간격으로, 90도에서 360도까지 90도 간격으로 비틀어 회전시켰다. 형상에 따른 풍가속도 예측 결과, 정방형 모델이 뒤틀림 모델보다 크게 산출되어 풍진동 영향에 더 민감한 것을 검증하였다.

In this paper, the wind-induced response characteristics of freeform shaped tall building is studied by using FSI analysis. The analytical models are twist shaped ones at representing type of atypical tall building, and this study focused on the relationship between twist angle and wind acceleration. Firstly, 1-way FSI analysis is performed, so maximum lateral displacement of the analytical model for 100 years return period wind speed is calculated, then the elastic modulus of a structure that satisfies the constraints condition is evaluated. And 2-way FSI analysis is carried out. so acceleration of the analytical model for the evaluated modulus of elasticity and arbitrary density is predicted through time history analysis. The basic model is a set of a square shape, height is 400m, slenderness ratio is 8, and twist model is rotated at square model from 0 to 90 degrees at intervals of 15 degrees and from 90 to 360 degrees at intervals of 90 degrees. According to the result of predicting wind acceleration by the shape of each model, the wind vibration effect of square shape model is confirmed to be sensitive more than a twist shape ones.

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참고문헌

  1. Cho, K.P., Lee, O.J. (2009) Wind-Excited Motions of Tall Buildings with Geometrical Shapes, Journal of Architecture Institute of Korea, 24(6), pp.21-32.
  2. Jeong, S.Y., Lee, K.S., Han, S.E. (2011) A Numerical Study on Wind Pressure Characteristics of Super-tall Protype Model Considering the Effect of Turbulence Intensity, Journal of Korean Society of Steel Construction, 23(6), pp.1-8.
  3. Kim, D.W., Ha, Y.C. (2004) Estimation of Wind Speeds for Return Period in the Major Cities Reflecting the Recent Meteorological Data, Journal of the Wind Engineering Institute of Korea, 8(2), pp.147-154.
  4. Spalart, P.R. (2004) Topics in Detached Eddy Simulation, Int.Conf.on Computational Fluid Dynamics.
  5. Squires, K.D., Forsythe, J.R., Spalart, P.R. (2001) Detached Eddy Simulation of the Separated Flow Around a Fore Body Cross-Section, Direct and Large-Eddy Simulation IV, pp.481-500.
  6. Strelets, M. (2001) Detached Eddy Simulation of Massively Separated Flows, AIAA Paper 2001-0879, 39th Aerospace Sciences Meeting and Exhibit, Reno, NV.
  7. Tamura. Y., Tanaka. H.,Ohtake. K., Nakai. M., Kim. Y.C. (2010) Aerodynamic Char Acteristics of Tall Building Models with Various Unconventional Configurations, Structures Congress, ASCE, pp. 3104-3113.
  8. Travin, A., Shur, M., Strelets, M. and Spalart, P.R. (2000) Detached-Eddy Simulations Past a Circular Cylinder. Flow, Turbulence and Combustion, 63(1), pp.293-313. https://doi.org/10.1023/A:1009901401183