DOI QR코드

DOI QR Code

The inertial coefficient for fluctuating flow through a dominant opening in a building

  • Xu, Haiwei (College of Civil Engineering and Architecture, Zhejiang University) ;
  • Yu, Shice (College of Civil Engineering and Architecture, Zhejiang University) ;
  • Lou, Wenjuan (College of Civil Engineering and Architecture, Zhejiang University)
  • 투고 : 2013.04.10
  • 심사 : 2013.09.05
  • 발행 : 2014.01.25

초록

For a building with a dominant windward wall opening, the wind-induced internal pressure response can be described by a second-order non-linear differential equation. However, there are two ill-defined parameters in the governing equation: the inertial coefficient $C_I$ and the loss coefficient $C_L$. Lack of knowledge of these two parameters restricts the practical use of the governing equation. This study was primarily focused on finding an accurate reference value for $C_I$, and the paper presents a systematic investigation of the factors influencing the inertial coefficient for a wind-tunnel model building including: opening configuration and location, wind speed and direction, approaching flow turbulence, the model material, and the installation method. A numerical model was used to simulate the volume deformation under internal pressure, and to predict the bulk modulus of an experimental model. In considering the structural flexibility, an alternative approach was proposed to ensure accurate internal volume distortions, so that similarity of internal pressure responses between model-scale and full-scale building was maintained. The research showed 0.8 to be a reasonable standard value for the inertial coefficient.

키워드

참고문헌

  1. Architectural Institute of Japan (2004), AIJ recommendations for loads on buildings, Tokyo.
  2. China Academy of Building Research (2002), Load code for the design of building structures, China.
  3. Ginger, J.D., Mehta, K.C. and Yeatts, B.B. (1997), "Internal pressures in a low-rise full-scale building", J. Wind. Eng. Ind. Aerod.,72 ,163-174. https://doi.org/10.1016/S0167-6105(97)00241-9
  4. Ginger, J.D., Letchford, C.W (1999), "Net pressure on low-rise full-scale building", J. Struct. Eng - ASCE., 83(1-3), 239-250.
  5. Ginger, J.D., Holmes, J.D. and Kim, P.Y. (2010), "Variation of internal pressure with varying sizes of dominant openings and volumes", J. Struct. Eng - ASCE., 136(10), 1319-1326. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000225
  6. Holmes, J.D. (1979), "Mean and fluctuating pressures induced by wind", Proceedings of the 5th International Conference on Wind Engineering, Fort Collins, Colorado, USA.
  7. Holmes, J.D. (2007), Wind loading of structures (2nd Ed.), Taylor &Francis Group.
  8. Liu, H. and Saathoff, P.J. (1982), "Internal pressure and building safety", J. Struct. Eng - ASCE., 108(10), 2223-2234.
  9. Liu, H. and Saathoff, P.J (1981), "Building internal pressure: sudden change", J. Eng. Mech. Div., 107(2),109-321.
  10. Oh, H.J., Kopp, G.A. and Inculet, D.R. (2007), "The UWO contribution to the NIST aerodynamic database for wind load on low buildings: Part 3.Internal pressure", J. Wind. Eng. Ind. Aerod., 95(8),755-779. https://doi.org/10.1016/j.jweia.2007.01.007
  11. Sharma, R.N. and Richards, P.J. (1997a), "Computational modeling of the transient response of building internal pressure to a sudden opening", J. Wind. Eng. Ind. Aerod.,72, 149-161. https://doi.org/10.1016/S0167-6105(97)00244-4
  12. Sharma, R.N. and Richards, P.J. (1997b), "Computational modeling in the prediction of building internal pressure gain function", J. Wind. Eng. Ind. Aerod. 67-68, 815-825. https://doi.org/10.1016/S0167-6105(97)00121-9
  13. Vickery, B.J (1986), "Gust factors for internal pressures in low-rise buildings", J. Wind. Eng. Ind. Aerod., 23, 259-271. https://doi.org/10.1016/0167-6105(86)90047-4
  14. Vickery, B.J. and Bloxham, C. (1992), "Internal pressure dynamics with a dominant opening", J. Wind. Eng. Ind. Aerod., 41,193-204. https://doi.org/10.1016/0167-6105(92)90409-4
  15. Yu, S.C., Lou, W.J. and Sun, B.N. (2006), "Wind-induced internal pressure fluctuations of structure with single windward wall opening", J. Zhejiang Univ. Sci.- A, 7,415-423. https://doi.org/10.1631/jzus.2006.A0415

피인용 문헌

  1. Estimation Method of Loss Coefficient for Wind-Induced Internal Pressure Fluctuations vol.142, pp.7, 2016, https://doi.org/10.1061/(ASCE)EM.1943-7889.0001097
  2. The loss coefficient for fluctuating flow through a dominant opening in a building vol.24, pp.1, 2014, https://doi.org/10.12989/was.2017.24.1.079
  3. Correlation of internal and external pressures and net pressure factors for cladding design vol.30, pp.3, 2020, https://doi.org/10.12989/was.2020.30.3.219