Browse > Article
http://dx.doi.org/10.9712/KASS.2013.13.1.097

Pressure Fluctuations on Tapered and Setback Tall Buildings  

Kim, Yong-Chul (Tokyo Polytechnic University, Wind Engineering Research Center)
Kanda, Jun (Nihon University, Department of Architecture)
Tamura, Yukio (Tokyo Polytechnic University, Wind Engineering Research Center)
Yoon, Sung-Won (Seoul National University of Science & Technology School of Architecture)
Publication Information
Journal of Korean Association for Spatial Structures / v.13, no.1, 2013 , pp. 97-104 More about this Journal
Abstract
Recent tall buildings tend to have unconventional shapes as a prevailing, which is effective for suppressing across-wind responses. Suppression of across-wind responses is a major factor in tall building projects, and the so called aerodynamic modification method is comprehensively used. The purpose of the present study is to investigate the pressure fluctuations on tapered and setback tall buildings, including peak pressures, power spectra and coherences through the synchronous multi-pressure sensing system techniques. And flow measurements around the models were conducted to investigate the condition of vortex shedding. The results show that by tapering and setback, different distributions of mean pressure coefficients at leeward surface were found, which is caused by the geometric characteristics of the models. And the power spectra of wind pressures at sideward surface become wideband and the peak frequencies are different depending on heights, which makes the correlation near the Strouhal component low or even negative. The differences in shedding frequencies were also confirmed by the flow fields around the models.
Keywords
Pressure fluctuation; Power spectrum; Coherence; Tapered tall building; Setback tall building;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 김동우, 하영철 (2004), 초고층건축물의 풍하중 저감을 위한 공력학적 방법, 대한건축학회 논문집 20(11), 3-10.
2 조지은 외 3인 (2005), 풍하중을 받는 테이퍼 고층건물의 진동변위응답 평가, 한국쉘.공간구조학회 논문집 5(4), 101-108.   과학기술학회마을
3 Lin, N. 외 4인 (2005) Characteristics of wind forces acting on tall buildings, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 93(3), 217-242.   DOI   ScienceOn
4 Kareem, A., Cermak, J.E. (1984), Pressure fluctuations on a square building model in boundary-layer flows, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 16, 17-41.   DOI   ScienceOn
5 김용철 (2012), 비정형 초고층 건물의 풍응답 평가, 대한건축학회 논문집 28(12), 37-44.
6 Vickery, B.J., Clark, A.W. (1972), Lift or across-wind response of tapered stacks, Journal of Structural Division 98(ST1), 1-20.
7 金容徹, 神田順 (2008), 風速相関および変断面角柱の風圧相関特性に関する研究, 日本建築学会大会学術講演梗概集, 193-194 (일본어).