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Received: 2005-04-23

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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.3 P.415~423

10.1631/jzus.2006.A0415


Wind-induced internal pressure fluctuations of structure with single windward opening


Author(s):  Yu Shi-ce, Lou Wen-juan, Sun Bing-nan

Affiliation(s):  Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   gafflin@163.com

Key Words:  Single windward opening, Internal pressure, Iteration algorithm, Equivalent opening ratio, Wind tunnel test


Yu Shi-ce, Lou Wen-juan, Sun Bing-nan. Wind-induced internal pressure fluctuations of structure with single windward opening[J]. Journal of Zhejiang University Science A, 2006, 7(3): 415~423.

@article{title="Wind-induced internal pressure fluctuations of structure with single windward opening",
author="Yu Shi-ce, Lou Wen-juan, Sun Bing-nan",
journal="Journal of Zhejiang University Science A",
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pages="415~423",
year="2006",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2006.A0415"
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%T Wind-induced internal pressure fluctuations of structure with single windward opening
%A Yu Shi-ce
%A Lou Wen-juan
%A Sun Bing-nan
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%D 2006
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.A0415

TY - JOUR
T1 - Wind-induced internal pressure fluctuations of structure with single windward opening
A1 - Yu Shi-ce
A1 - Lou Wen-juan
A1 - Sun Bing-nan
J0 - Journal of Zhejiang University Science A
VL - 7
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SP - 415
EP - 423
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Y1 - 2006
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2006.A0415


Abstract: 
A frequency domain method for estimating wind-induced fluctuating internal pressure of structure with single windward opening is presented in this paper and wind tunnel tests were carried out to verify the theory. The nonlinear differential equation of internal pressure dynamics and iteration algorithm were applied to calculate fluctuating internal pressure and time domain analysis was used to verify the accuracy of the proposed method. A simplified estimation method is also provided and its scope of application is clarified. The mechanism of internal pressure fluctuation is obtained by using the proposed method in the frequency domain and a new equivalent opening ratio is defined to evaluate internal pressure fluctuation. A series of low-rise building models with various openings and internal volumes were designed for wind tunnel tests with results agreeing well with analytical results. It is shown that the proposed frequency domain method based on Gaussian distribution of internal pressure fluctuations can be applied to predict the RMS internal pressure coefficient with adequate accuracy for any opening dimensions, while the simplified method can only be used for structure with single dominant opening. Helmholtz resonance is likely to occur when the equivalent opening ratio is adequately high, and controlling individual opening dimension is an effective strategy for avoiding Helmholtz resonance in engineering.

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Reference

[1] Chaplin, G.C., Randall, J.R., Baker, C.J., 2000. The turbulent ventilation of a single opening enclosure. J. Wind Eng. Ind. Aerodyn., 85(2):145-161.

[2] Ginger, J.D., Letchford, C.W., 1999. Net pressures on a low-rise full-scale building. J. Wind Eng. Ind. Aerodyn., 83(1-3):239-250.

[3] Ginger, J.D., Mehta, K.C., Yeatts, B.B., 1997. Internal pressure in a low-rise full-scale building. J. Wind Eng. Ind. Aerodyn., 72:163-174.

[4] Holmes, J.D., 1979. Mean and Fluctuating Pressures Induced by Wind. Proc. 5th Int. Conf. on Wind Engineering, Fort Collins, USA, 1:435-450.

[5] Liu, H., Saathoff, P.J., 1982. Internal pressure and building safety. J. Struct. Eng., 108:2223-2234.

[6] Sharma, R.N., Richards, P.J., 1997. The effect of roof flexibility on internal pressure fluctuations. J. Wind Eng. Ind. Aerodyn., 72:175-186.

[7] Sharma, R.N., Richards, P.J., 2004. The multi-stage process of windward wall pressure admittance. J. Wind Eng. Ind. Aerodyn., 92(14-15):1191-1218.

[8] Stathopoulos, T., Luchian, H.D., 1989. Transient wind induced internal pressures. J. Eng. Mech. Div. ASCE, 115(7):1501-1514.

[9] Vickery, B.J., Bloxham, C., 1992. Internal pressure dynamics with a dominant opening. J. Wind Eng. Ind. Aerodyn., 41(1-3):193-204.

[10] Woods, A.R., Blackmore, P.A., 1995. The effect of dominant openings and porosity on internal pressures. J. Wind Eng. Ind. Aerodyn., 57(2-3):167-177.

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