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Wind pressures on flat roof edges and corners of large low buildings

Title:

Wind pressures on flat roof edges and corners of large low buildings

Alrawashdeh, Hatem ORCID: https://orcid.org/0000-0002-9802-3213 (2015) Wind pressures on flat roof edges and corners of large low buildings. Masters thesis, Concordia University.

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Abstract

The present wind tunnel study examines the suitability of the current wind provisions in wind codes and standards for the design of roof zones of flat-roofed low-rise buildings with large dimensions. Current wind codes and standards have load provisions dealing with low buildings of common configurations. Large buildings, say 100 m long, have not been considered when these provisions were established. As a result, the interaction between wind and buildings of such geometries should be investigated for the assessment of current wind provisions in terms of their applicability to such configurations.
Nine large low-rise buildings of 5, 7.5 and 10 m high with flat roofs have been tested in a typical open country exposure in the Boundary Layer Wind Tunnel of Concordia University. The models have been tested for wind directions ranging from 0° to 90° at increments of 15°. The buildings have large square plan with equivalent full-scale horizontal dimensions ranging from 60 to 180 m.
Local roof pressure coefficients have been obtained from the wind tunnel measurements. Moreover, area-averaged negative peak pressure coefficients have been established using numerical integration of individual pressure coefficients. The effects of building dimensions on the generated roof pressures have been addressed in this study.
This thesis presents a comparative study based on code provisions and experimental results. The first part compares the application of the current code roof zone systems and the design wind pressures specified in codes and standards. The second part of the study compares the experimental results with the respective values specified in code/standard provisions in terms of wind pressures and roof zone sizes to assess the suitability of these provisions. These comparisons show significant differences in the patterns of the design pressure coefficients among the current wind codes and standards.
Application of the current provisions of ASCE 7-10 and NBCC 2010 on building geometries of large roofs and low height may lead to considerably conservative and uneconomic roof design. An exception for very long low buildings, as far as the determination of the sizes of roof edge and corner zones is concerned, has been recommended to rectify the deficiency of wind codes and standards for these building geometries.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Building, Civil and Environmental Engineering
Item Type:Thesis (Masters)
Authors:Alrawashdeh, Hatem
Institution:Concordia University
Degree Name:M.A. Sc.
Program:Building Engineering
Date:9 September 2015
Thesis Supervisor(s):Stathopoulos, Theodore
Keywords:Wind codes and standards; large low buildings; design; edge and corner zones; roof pressures.
ID Code:980473
Deposited By: HATEM ALRAWASHDEH
Deposited On:02 Nov 2015 15:54
Last Modified:18 Jan 2018 17:51

References:

ASCE/SEI 7-10, 2010. Minimum Design Loads for Buildings and Other Structures. Structural Engineering Institute of ASCE, Reston, VA.
ASCE, 1999. Wind Tunnel Studies of Buildings and Structures. Manual of Practice No. 67, American Society of Civil Engineers, Reston, VA, 20191-4400, USA.
ASCE, 2012. Wind Tunnel Testing for Buildings and Other Structures. ASCE Standard (ASCE/SEI 49-12), American Society of Civil Engineers, Reston, VA, 20191, USA.
AS/NZS 1170.2 (2011). Australian/New Zealand Standard for Structural Design Actions, part 2: Wind Actions. Sydney, New South Wales, Australia: Standards Australia and Standards New Zealand.
Blackmore, P. A., 1988. Load Reduction on Flat Roofs – The Effect of Edge Profile. Journal of Wind Engineering and Industrial Aerodynamics, 29, 1-3, 89–98.
Barnaud, G., Gandemer, J., 1974. Determination en Soufflerie Simulant le Vent Naturel des Coefficients de Pression sur les Structures Basses. Section Aerodynamique des Constructions ADYM-12.74, Centre Scientifique et Technique du Batiment, Etablissement de Nantes.
Baskaran, A., Stathopoulos, T., 1988. Roof Corner Wind Loads and Parapet Configurations, Journal of Wind Engineering and Industrial Aerodynamics, 29, 1-3, 79–88.
Cermak, J.E, 1975. Applications of Fluid Mechanics to Wind Engineering – A Freeman Scholar Lecture. Journal of fluids Engineering, March. Pp. 9-38.
Cochran, L.S., Cermak, J.E., 1992. Full- and Model-Scale Cladding Pressures on the Texas Tech Experimental Building. Journal of Wind Engineering and Industrial Aerodynamics, 43, 1589–1600.
Cook, N.J., 1990. The Designer’s Guide to Wind Loading of Buildings Structures, Part 2: Static Structures, BRE, Gariston.
Davenport A.G., 1983. On the Assessment of the Reliability of Wind Loading on Low Buildings. Journal of Wind Engineering and Industrial Aerodynamics, 11, 21-37.
Davenport, A. G., Surry, D., 1974. Pressures on Low Rise Structures in Turbulent Wind. Presented at the Canadian Structural Engineering Conference, Toronto.
Davenport, A.G., Surry, D., Stathopoulos, T, 1977. Wind Loads on Low-Rise Buildings, Final Report on Phases I and II. BLWT-SS7, The University of Western Ontario, London, Ontario, Canada.
Davenport, A.G., Surry, D., Stathopoulos, T, 1978. Wind Loads on Low-Rise Buildings, Final Report on Phase III. BLWT-SS8, The University of Western Ontario, London, Ontario, Canada.
Durst, C.S, 1960. Wind Speeds Over Short Periods of Time. Meteor. Magazine, 89, 181-187.
Eaton, K.J., Mayne, J.R., 1975. The Measurements of Wind Pressures on Two-Story Houses at Aylesbury. Journal of Wind Engineering and Industrial Aerodynamics, 1(1), 67-109.
Elsharawy, M., Galal, K., Stathopoulos, T., 2014. Comparison of Wind Tunnel Measurements with NBCC 2010 Wind-induced Torsion Provisions for Low- and Medium-rise Buildings. Canadian Journal of Civil Engineering, 41(5), 409-420.
Evans, B. H., 1957. Natural Air Flow Around Buildings. Texas Engineering Experimental Station Research Report 59, College Station, Texas.
EN 1991-1-4, 2005. Eurocode 1, 2005: Actions on Structures-General actions-Part 1-4: Wind Actions, European Standard.
Garret, J.R., 1994. The Atmospheric Boundary Layer, Cambridge University Press (Cambridge).
Gerhardt, H. J., Kramer, C., 1992. Effect of Building Geometry on Roof Wind Loading. Journal of Wind Engineering and Industrial Aerodynamics, 43, 1765–1773.
Geurts, C.P.W, Bentum, C.V., 2007. Wind Loading on Buildings: Eurocode and Experimental Approach, in T. Stathopoulos and C.C. Baniotopoulos, Wind Effects on Buildings and Design of Wind-Sensitive Structures, New York, pp. 31-65, Springer.
Geurts, C.P.W., Kopp, G.A., Morrison, M.J., 2013. A Review of the Wind Loading Zones for Flat Roofs in Code Provisions. Conference Paper: 6th European and African Conference on Wind Engineering, (EACWE 2013), Cambridge, (pp. 1-9).
Ginger, J.D., Reardon, G.F., Whitbread, B.J., 2000. Wind Load Effects and Equivalent Pressures on Low-Rise House Roofs. Engineering Structures, 22(6), 638-646.
Hee, J., Bienkiewicz, B., 1998. Wind Tunnel Simulation of TTU Flow and Building Roof Pressure. Journal of Wind Engineering and Industrial Aerodynamics. 77-78, 119-133.
Hellers, G., Lundgren, S., 1974. Wind Loads on Generally Shaped House Bodies-Model Tests. Report R22: 1974, National Swedish Building Research Summaries.
Hillier, R., 1973. An Investigation of the Cladding Wind Loads on Model of Hartlepool Switch House. CERL Report RDL/N227/73, Central Electricity Research Laboratories, Surrey, England.
Ho, T.C.E., Surry, D., Morrish, D., Kopp, G.A., 2005. The UWO Contribution to the NIST Aerodynamic Database for Wind on Low Buildings: Part 1. Archiving Format and Basic Aerodynamic Data. Journal of Wind Engineering and Industrial Aerodynamics, 93, 1-30.
Holmes, J. D., 1986. Wind Pressures on Tropical Housing. Journal of Wind Engineering and Industrial Aerodynamics, 53, 1-2, 105–123.
Holmes, J.D., 1993.Wind Loads on Low-rise Buildings - A Review. CSIRO, Division of Building Research, Highett, Victoria, Australia.
Holmes, J.D., 2001. Wind Loading of Structures, Spon Press London, New York.
Holmes, J. D., Best, R.J., 1978. Wind Pressures on an Isolated High-Set House. James Cook University of North Queensland, Australia, Wind Engineering Report 3/78, Qeensland, Australia.
Jensen, M., 1958. The model Law for Phenomena in Natural Wind. Ingenioren (international edition), 2, 4, 121-128.
Jensen, M., Franck, N., 1965. Model-Scale Tests in Turbulent Wind, Parts I and II. The Danish Technical Press, Copenhagen.
Kasperski, M., 1996. Design Wind Loads for Low-rise Buildings: A Critical Review of Wind Load Specifications for Industrial Buildings. Journal of Wind Engineering and Industrial Aerodynamics, 61,169-179.
Kind, R. J., 1988.Worst Suctions Near Edges of Flat Rooftops with Parapets. Journal of Wind Engineering and Industrial Aerodynamics, 31, 2-3, 251–264.
Kramer, C., Gerhardt, H. J., 1975. Windbelastung auf Flachdachern. Published in Das Dechdeckerhandwerk, Koln. 96, 16.
Krishna, P., 1995. Wind Loads on Low Rise Buildings - A Review. Journal of Wind Engineering and Industrial Aerodynamics, 54-55, 383-396.
Leutheusser, H. J.,1964 .The Effects of Wall Parapets on the Roof Pressure Coefficient of Block-Type and Cylindrical Structures, Univ. Toronto, Dept. Mech. Eng., 1964, TP 6404.
Lin, J.X., Surry, D., 1998. The Variation of Peak Loads With Tributary Area Near Corners on Flat Low Building Roofs. Journal of Wind Engineering and Industrial Aerodynamics, 77-78, 185-196
Lin, J.X., Surry, D., Tieleman, H.W., 1995. The Distribution of Pressure Near Roof Corners of Flat Roof Low Buildings. Journal of Wind Engineering and Industrial Aerodynamics, 56, 235–265.
Marshall, R. D., 1974. A Study of Wind Pressures on a Single-Family Dwelling in Model and Full Scale. Proceedings of the Invitational Symposium on Full Scale Measurements of Wind Effects on Tall Buildings and Other Structures. Boundary Layer Wind Tunnel Laboratory, The University of Western Ontario, Canada, June 23-29.
Marshall, R.D., 1977. The Measurement of Wind Loads on a Full-Scale Mobile Home. National Bureau of Standards, U.S. Dep. of Commerce, Washington, D.C., NBSIR 77-1289.
Milford, R.V., Goliger, A.M., Waldech, J.L., 1992. Jan Smuts Experiment: Comparison of Full-Scale and Wind-Tunnel Results. Journal of Wind Engineering and Industrial Aerodynamics, 43, 1693-1704.
Minor, J.E., and Mehta K.C., 1979. Wind Damage Observations and Implications. Journal of the Structural Division. ASCE, November, pp 2279-2291.
Morrison, M.J., Kopp, G.A., 2007. Evaluation of the ASCE 7-05 Definition of Edge and Corner Zones for Low-Rise Buildings. The Boundary Layer Wind Tunnel Laboratory, The University of Western Ontario, Faculty of Engineering, London, Ontario, Canada N6A 5B9.
NBC2010, 2010. User’s Guide-NBC 2010, Structural Commentaries (Part 4). Issued by the Canadian Commission on Buildings and Fire Codes, National Research Council of Canada.
Prandtl, L., 1905. Verhandlungen des dritten internationalen Mathematiker-Kongresses in Heidel berg 1904, Krazer, A. (ed.), Leipzig: Teubner, p. 484. English trans. Ackroyd, J. A. K., Axcell, B. P., Ruban, A. I. (eds.) 2001. Early Developments of Modern Aerodynamics. Oxford: Butterworth-Heinemann, p. 77.
Simiu, E., Scanlan, R.H., 1996. Wind Effects on Structures: Fundamentals and Applications to Design, third edition Wiley and Sons, New York.
Shoemaker, W.L., 2014. Insights into Wind Loads for Low-Rise Buildings. Structure Magazine.
Stathopoulos, T., 1975. Wind Pressure Loads on Flat Roofs. BLWT Report 3-1975, The University of Western Ontario, London, Ontario, Canada.
Stathopoulos, T., 1979. Turbulent Wind Action on Low-rise Buildings. Ph.D. Thesis, The University of Western Ontario, London, Ontario, Canada.
Stathopoulos, T., 1981. Wind Loads on Eaves of Low Buildings. Journal of the Structural Division, ASCE, 107(10), 1921-1934.
Stathopoulos, T., (1982). Techniques and Modeling Criteria for Measuring Area Averaged Pressures. International Workshop on Wind Tunnel Modeling Criteria and Techniques in Civil Engineering Applications, Gaithersburg, MD, p. 257 – 274, Cambridge University Press.
Stathopoulos, T., 1984-A. Design and Fabrication of a Wind Tunnel for Building Aerodynamics. Journal of Wind Engineering and Industrial Aerodynamics, 16, 361-376.
Stathopoulos, T., 1984-B. Wind Loads on Low-rise Buildings - A Review of the State of the Art, Engineering Structures, 6, 119–135.
Stathopoulos, T., Baniotopoulos, C.C., (2007). Wind Effects on Buildings and Design of Wind- Sensitive Structures. SpringerWeinNewYork, ISBN 978-3-211-73075-1.
Stathopoulos, T., Dumitrescu-Brulotte, M., 1989. Design Recommendations for Wind Loading on Buildings of Intermediate Height. Canadian Journal of Civil Engineering, 16, 910-916.
Stathopoulos, T., Luchian, H.D., 1990. Wind Pressures on Buildings Configurations with Stepped Roofs. Canadian Journal of Civil Engineering, 17(4), 569-577.
Stathopoulos, T., Luchian, H., 1992. Wind-Induced Forces on Eaves of Low Buildings. Wind Engineering Society Inaugural Conference, Cambridge, England.
Stathopoulos, T., Saathoff, P., 1991. Wind Pressures on Roofs of Various Geometries. Journal of Wind Engineering and Industrial Aerodynamics, 38, 273-284.
Stathopoulos, T., Surry, D., 1983. Scale Effects in Wind Tunnel Testing of Low Buildings. Journal of Wind Engineering and Industrial Aerodynamics, 13, 313-326.
Stathopoulos, T., Marathe, R., Wu, H., 1999. Mean Wind Pressures on Flat Roof Corners Affected by Parapets: Field and Wind Tunnel Studies. Engineering Structures, 21, 629–638.
Stathopoulos, T., Surray, D., Davenport, A. G., 1985. A Simplified Model of Wind Pressure Coefficients for Low-Rise Buildings. In Proc. ICOSSAR’85.
Stathopoulos, T., Zhu, X., 1988. Wind Pressures on Buildings with Appurtenances. Journal of Wind Engineering and Industrial Aerodynamics, 31, 265-281.
Stathopoulos, T., Kumar, K.S., Mohammadiam, A.R., 1996. Design Wind Pressure Coefficients for Monoslope Roofs: A Time Series Approach. Journal of Wind Engineering and Industrial Aerodynamics, 65, 143-153.
St. Pierre, L.M., Kopp, G.A., Surry, D., Ho, T.C.E., 2005. The UWO Contribution to the NIST Aerodynamic Database for Wind on Low Buildings: Part 2. Comparison of Data with Wind Load Provisions. Journal of Wind Engineering and Industrial Aerodynamics, 93, 31-59.
Surry, D., Kitchen, R. B., Davenport, A. G., 1977. Wind Loading of Two Hangars Proposed for Jeddah Airport, Saudi Arabia - A Rigid Model Study. Report unpublished, Boundary Layer Wind Tunnel Laboratory, The University of Western Ontario, London, Ontario, Canada.
Surry, D., Stathopoulos, T., 1978. An Experimental Approach to the Economical Measurements of Spatially Averaged Wind Loads. Journal of Wind Engineering and Industrial Aerodynamics, 2 (4), 385-97.
Uematsu, Y., Isyumov, N., 1999. Wind Pressures Acting on Low-Rise Buildings. Journal of Wind Engineering and Industrial Aerodynamics, 82, 1-25.
Uematsu, Y., Suzuya, J. and Nozawa, T., 1992. Building Damage in Aomori and Akita Prefectures Die to Typhoon No.19 of 1991, Journal of Wind Engineering, Japan Association for Wind Engineering, 51, 35-47.
Vickery, B. J., 1976. Wind Loads on Low-Rise Buildings. Presented at D.R.C Seminar, Darwin, March 30, Unpublished.
Wiren, B., 1971. Wind Tunnel Investigation of the Pressure Distribution on a Flat Roof with Different Edge Profiles. Translated From the Swedish, Library Communication 1606, Building Research Station.
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