Wind Tunnel Studies on Sawtooth and Monosloped Roofs
Publication: Journal of Structural Engineering
Volume 136, Issue 9
Abstract
Wind tunnel studies were conducted on 1:100 scale building models of monosloped and several (two- through five-span) sawtooth roof buildings to determine appropriate peak and area-averaged wind pressure coefficients. The results showed that the peak negative pressure coefficients in the high corner regions of monosloped roof buildings are nearly equal to the high corner peak negative pressure coefficients on the windward span (Span A) of the sawtooth roof building, and as expected, low corner zone peak negative pressure coefficients on sawtooth roofs are greater (approximately 150%) than on monosloped roofs. The peak negative coefficients were in general agreement with the earlier wind tunnel study used to develop American wind load design standards, and they suggested that the Australian wind design standard may underestimate the peak loads for moderately sloped (around 20°) sawtooth roofs. Preliminary analyses of the data suggest that current ASCE 7 wind design provisions for monosloped roof buildings may underestimate the high corner design wind pressure. However, this may be offset by a more rapid decrease in area-averaged peak pressure coefficients with increasing tributary areas than was previously observed in the earlier studies.
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References
ASCE. (1987). “Wind tunnel model studies of buildings and structures.” Manuals and reports on engineering practice, ASCE, New York.
ASCE/SEI. (2006). “Minimum design loads for buildings and other structures.” ASCE 7-05, ASCE, Reston, Va.
Cui, B. (2007). “Wind effects on monosloped and sawtooth roofs.” Ph.D. thesis, Clemson Univ., Clemson, S.C.
Garg, R. K., Lou, J. X., and Kasperski, M. (1997). “Some features of modeling spectral characteristics of flow in boundary layer wind tunnels.” J. Wind. Eng. Ind. Aerodyn., 72(1–3), 1–12.
Holmes, J. D. (1982). “Techniques and modelling criteria for the measurement of external and internal pressures.” Int. Workshop on Wind Tunnel Modeling Criteria and Techniques in Civil Engineering Applications, Cambridge University Press, Cambridge, England, 245–256.
Holmes, J. D. (1983). “Wind loading of saw-tooth roof buildings—I. Point pressures.” Internal Rep. No. 83/17, CSIRO, Div. of Building Research, Highett, Australia.
Holmes, J. D. (1984). “Wind loading of saw-tooth roof buildings—II. Panel pressures.” Internal Rep. No. 84/1, CSIRO, Div. of Building Research, Highett, Australia.
Holmes, J. D. (1987). “Wind loading of multi-span buildings.” First National Structural Engineering Conf., Institution of Engineers, Australia, Melbourne, Australia.
Irwin, H. P. A. H., Cooper, K. R., and Girard, R. (1979). “Correction of distortion effects caused by tubing systems in measurements of fluctuating pressures.” Journal of Industrial Aerodynamics, 5(1–2), 93–107.
Lieblein, J. (1974). “Efficient methods of extreme-value methodology.” National Bureau of Standards, Washington, D.C.
Richards, P. J., Hoxey, R. P., Connell, B. D., and Lander, D. P. (2007). “Wind-tunnel modelling of the Silsoe Cube.” J. Wind. Eng. Ind. Aerodyn., 95(9–11), 1384–1399.
Saathoff, P. J., and Stathopoulos, T. (1992). “Wind loads on buildings with sawtooth roofs.” J. Struct. Eng., 118(2), 429–446.
Standards Australia. (2002). “Australian/New Zealand standard: Structural design actions. Part 2: Wind actions.” AS/NZS 1170.2, Standards Australia International Ltd., Sydney, Australia.
Stathopoulos, T. (1982). “Techniques and modeling criteria for measuring area averaged pressures.” Int. Workshop on Wind Tunnel Modeling Criteria and Techniques in Civil Engineering Applications, Cambridge University Press, Cambridge, England, 257–274.
Stathopoulos, T., and Mohammadian, A. R. (1985). “Wind loads on low buildings with mono-sloped roofs.” J. Wind. Eng. Ind. Aerodyn., 23(1–3), 81–97.
Stathopoulos, T., and Saathoff, P. (1992). “Codification of wind pressure coefficients for sawtooth roofs.” J. Wind. Eng. Ind. Aerodyn., 43(1–3), 1727–1738.
Tieleman, H. W. (1982). “Simulation criteria based on meteorological or theoretical considerations.” Int. Workshop on Wind Tunnel Modeling Criteria and Techniques in Civil Engineering Applications, Cambridge University Press, Cambridge, England, 73–96.
Tieleman, H. W., Akins, R. E., and Sparks, P. R. (1981). “A comparison of wind tunnel and full-scale wind pressure measurements on low-rise structures.” J. Wind. Eng. Ind. Aerodyn., 8, 3–19.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 136 • Issue 9 • September 2010
Pages: 1161 - 1171
Copyright
© 2010 ASCE.
History
Received: May 4, 2009
Accepted: Feb 3, 2010
Published online: Feb 8, 2010
Published in print: Sep 2010
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