Wind Loads on Buildings with Sawtooth Roofs
Publication: Journal of Structural Engineering
Volume 118, Issue 2
Abstract
A wind‐tunnel study is conducted to assess wind loads on buildings with sawtooth roofs. Local and area‐averaged pressure coefficients are measured on models with one, two, and four spans. The roof angle is 15° in all cases. In most regions of the roof, critical values of mean and peak suction obtained with the double‐span and multispan models are similar in magnitude to data obtained with the single‐span model. However, pressure data measured near the roof edge in the trough of the double‐span and multispan models are more than 50% larger than corresponding data obtained with the single‐span model. Positive pressures measured on walls of the sawtooth models are similar in magnitude to those obtained with the monosloped roof model. However, positive pressures measured in the trough region of the sawtooth roof are significantly larger than corresponding data for the monosloped roof. Local pressure data obtained in the present study are compared with design pressures for sawtooth buildings specified in the Australian standard. Peak suctions and positive pressures are generally larger than the values given in the Australian standard.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Blackmore, P. A. (1986), “Wind loads on pitch roof multi‐span buildings.” Bldg. Res. Establishment Note No. N120/86, Dept. of Environment, Garston, Watford, U.K.
2.
Deaves, D. M., and Harris, R. I. (1978). “A mathematical model of the structure of strong winds.” Report 76, Constr. Industry Res. and Information Association.
3.
Holmes, J. D. (1983). “Wind loading of saw‐tooth roof buildings, Part 1: Point pressures.” Internal Report No. 83/17, Division of Building Research, CSIRO, Melbourne, Australia.
4.
Holmes, J. D. (1987). “Wind loading of multi‐span building.” First National Structural Engineering Conf., Melbourne, Australia, Aug. 26–28.
5.
Kind, R. J. (1986). “Worst suctions near edges of flat rooftops on low‐rise buildings.” J. Wind Engrg. Ind. Aerodynamics, 25, 31–49.
6.
“Minimum design loads for buildings and other structures.” (1990). ASCE 7‐88, ASCE, New York, N.Y.
7.
“Minimum design loads on structures. Part 2—Wind forces.” (1989). Australian Standard AS 1170.2, Standards Association of Australia.
8.
Mohammadian, A. R. (1989). “Wind loads on buildings with monosloped roofs—stochastic modelling of pressure fluctuations,” thesis, presented to Concordia Univ., at Montreal, Quebec, Canada, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
9.
Stathopoulos, T. (1987). “Wind pressures on flat roof edges and corners.” Proc. of Seventh Int. Conf. on Wind Engrg., Intern. Assoc. of Wind Engrg., Fluid Mechanics Lab., Fachhochschule Aachen, Germany, July 6–10.
10.
Stathopoulos, T., and Surry, D. (1983). “Scale effects in wind tunnel testing of low buildings.” J. Wind Engrg. Ind. Aerodynamics, 13, 313–326.
11.
Supplement to the National Building Code of Canada 1990. (1990). Assoc. Committee on the Nat. Bldg. Code, Nat. Res. Council of Canada, Ottawa, Canada.
12.
Surry, D., and Stathopoulos, T. (1978). “An experimental approach to the economical measurement of spatially‐averaged wind loads.” J. Industrial Aerodynamics, 2, 385–397.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 118 • Issue 2 • February 1992
Pages: 429 - 446
Copyright
Copyright © 1992 ASCE.
History
Published online: Feb 1, 1992
Published in print: Feb 1992
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.