Wind Tunnel Tests on Wind Pressure Characteristics of Sawtooth Roofs
Publication: Journal of Aerospace Engineering
Volume 31, Issue 6
Abstract
Wind tunnel tests were conducted to investigate the wind pressure characteristics of sawtooth roofs in a simulated open country wind field with relatively low turbulence intensity. Models of monosloped and sawtooth roof (two to four spans) buildings that were scale were constructed with intense pressure taps installed on the 15° sloped roofs. Both local and area-average pressure coefficients were determined under different wind directions. Preliminary results indicated that the local peak negative pressure coefficients were slightly lower than the literature results. The increase of roof slope led to higher peak design pressure coefficients for sawtooth roofs, especially in the interior and edge regions of roofs. The peak values of negative pressure captured in high corner regions of monosloped roofs were similar to the corresponding data measured on the windward span of sawtooth roofs, which indicated that the American standard provisions for wind pressure design of monosloped roof structures and the Chinese local wind pressure provisions for sawtooth roofs may underestimate the critical wind suction on high corner regions of monosloped roofs. Generally, the area-average pressures heavily depend on the size of tributary area and the region concerned, and higher roof slope led to faster reduction.
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Acknowledgments
The work described in this paper was supported by the Hunan Provincial Education Department Scientific Research Outstanding Youth Project under Contract No. 16B011. The authors would also like to gratefully acknowledge the support from the National Natural Science Foundation of China (Nos. 51478049, 51678079, and 51628802) and the School of Civil Engineering and Architecture, Changsha University of Science and Technology.
References
ASCE. 1990. Minimum design loads for buildings and other structures. ASCE 7-88, revision of ANSI A58.1-1982. Reston VA: ASCE.
ASCE. 2006. Minimum design loads for buildings and other structures. ASCE/SEI 7-05. Reston VA: ASCE/SEI.
ASCE. 2013. Minimum design loads for buildings and other structures. ASCE/SEI 7-10. Reston VA: ASCE.
Cao, S. Y., Y. J. Ge, and Y. Tamura. 2005. “Wind damage in China caused by Typhoon Rananim.” In Proc., 6th Asia-Pacific Conf. on Wind Engineering, 200–209. Seoul: Korea Society for Wind Engineering.
Geurts, C. P. W., P. C. V. Staalduinen, and M. S. D. Wit. 2004. “Towards a reliable design of facade and roof elements against wind loading.” Heron 49 (2): 171–187.
Holmes, J. D. 1983. Wind loading of saw-tooth buildings, Part 1: Point pressure. Melbourne, Australia: Division of Building Research, Commonwealth Scientific and Industrial Research Organisation (CSIRO).
Holmes, J. D. 1987. “Wind loading of multi-span building.” In Proc., First National Structural Engineering Conf., 26–28. Barton, Australia: Institution of Engineers, Australia.
Holmes, J. D. 2015. Wind loading of structures, 1–29. 2nd ed. London: Taylor & Francis.
Hui, Y., Y. Tamura, and Q. S. Yang. 2017. “Estimation of extreme wind load on structures and claddings.” J. Eng. Mech. 143 (9): 04017081. https://doi.org/10.1061/(ASCE)EM.1943-7889.0001304.
Kawai, H. 2002. “Local peak pressure and conical vortex on building.” J. Wind Eng. Ind. Aerodyn. 90 (4–5): 251–263. https://doi.org/10.1016/S0167-6105(01)00218-5.
Kawai, H., and G. Nishimura. 1996. “Characteristics of fluctuating suction and conical vortices on a flat roof in oblique flow.” J. Wind Eng. Ind. Aerodyn. 60: 211–225. https://doi.org/10.1016/0167-6105(96)00035-9.
Li, Q. S., S. Y. Hu, Y. M. Dai, and Y. C. He. 2012. “Field measurements of extreme pressures on a flat roof of a low-rise building during typhoons.” J. Wind Eng. Ind. Aerodyn. 111: 14–29. https://doi.org/10.1016/j.jweia.2012.08.003.
Li, Q. S., and W. H. Melbourne. 1995. “An experimental investigation of the effects of free-stream turbulence on streamwise surface pressures in separated and reattaching flows.” J. Wind Eng. Ind. Aerodyn. 54–55: 313–323. https://doi.org/10.1016/0167-6105(94)00050-N.
Lin, J. X., D. Surry, and H. W. Tieleman. 1995. “The distribution of pressure near roof corners of flat roof low buildings.” J. Wind Eng. Ind. Aerodyn. 56 (2–3): 235–265. https://doi.org/10.1016/0167-6105(94)00089-V.
Ma, X., and F. Xu. 2017. “Peak factor estimation of non-Gaussian wind pressure on high-rise buildings.” Struct. Des. Tall Special Build. 26 (17): e1386. https://doi.org/10.1002/tal.1386.
Ma, X., F. Xu, A. Kareem, and T. Chen. 2016. “Estimation of surface pressure extremes: Hybrid data and simulation-based approach.” J. Eng. Mech. 142 (10): 04016068. https://doi.org/10.1061/(ASCE)EM.1943-7889.0001127.
Mehta, K. C., M. L. Levitan, R. E. Iverson, and J. R. McDonald. 1992. “Roof corner pressures measured in the field on a low rise building.” J. Wind Eng. Ind. Aerodyn. 41 (1–3): 181–192. https://doi.org/10.1016/0167-6105(92)90408-3.
Mohammadian, A. R. 1989. “Wind loads on buildings with monosloped roofs-stochastic modeling of pressure fluctuations.” Ph.D. dissertation, Centre for Building Studies, Concordia Univ.
MOHURD (Ministry of Housing and Urban-Rural Development). 2012. Load code for the design of building structures. GB 50009-2012. Beijing: MOHURD.
NRC (National Research Council Canada). 1990. Supplement to the National Building Code of Canada 1990. Ottawa: NRC.
Prevatt, D. O., and B. Cui. 2010. “Wind tunnel studies on sawtooth and monosloped roofs.” J. Struct. Eng. 136 (9): 1161–1171. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000200.
Saathoff, P. J., and W. H. Melbourne. 1997. “Effects of free-stream turbulence on surface pressure fluctuations in a separation bubble.” J. Fluid Mech. 337: 1–24. https://doi.org/10.1017/S0022112096004594.
Saathoff, P. J., and T. Stathopoulos. 1992. “Wind loads on buildings with sawtooth roofs.” J. Struct. Eng. 118 (2): 429–446. https://doi.org/10.1061/(ASCE)0733-9445(1992)118:2(429).
SA (Standards Australia). 1989. Minimum design loads on structures. Part 2: Wind forces. AS 1170.2. Sydney, Australia: SA.
SA (Standards Australia). 2002. Structural design actions. Part 2: Wind actions. AS/NZS 1170.2. Sydney, Australia: SA.
Stathopoulos, T., R. Marathe, and H. Wu. 1999. “Mean wind pressures on flat roof corners affected by parapets: Field and wind tunnel studies.” Eng. Struct. 21 (7): 629–638. https://doi.org/10.1016/S0141-0296(98)00011-X.
Stathopoulos, T., and A. R. Mohammadian. 1985. “Wind loads on low buildings with mono-sloped roofs.” In Proc., 6th Colloquium on Industrial Aerodynamics. Aachen, Germany: Fluid Mechanics Laboratory, Department of Aeronautics.
Surry, D., and T. Stathopoulos. 1985. The wind loading of low buildings with mono-sloped roofs. London, Ontario, Canada: Univ. of Western Ontario.
Tieleman, H. W., D. Surry, and J. X. Lin. 1994. “Characteristics of mean and fluctuating pressure coefficients under corner (delta wind).” J. Wind Eng. Ind. Aerodyn. 52: 263–275. https://doi.org/10.1016/0167-6105(94)90052-3.
Wu, F., P. P. Sarkar, K. C. Metha, and Z. Zhao. 2001. “Influence of incident wind turbulence on pressure fluctuations near flat-roof corners.” J. Wind Eng. Ind. Aerodyn. 89 (5): 403–420. https://doi.org/10.1016/S0167-6105(00)00072-6.
Zisis, I., and T. Stathopoulos. 2010. “Wind-induced loads on the foundation of a low-rise building: Full-scale and wind tunnel experimentation.” In Proc., Structures Congress 2010, 1120–1130. Reston, VA: ASCE.
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Published In
Journal of Aerospace Engineering
Volume 31 • Issue 6 • November 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Aug 4, 2017
Accepted: May 14, 2018
Published online: Aug 30, 2018
Published in print: Nov 1, 2018
Discussion open until: Jan 30, 2019
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