Wind Pressures on -Sloped Hip Roofs of L- and T-Shaped Low-Rise Buildings
Publication: Journal of Structural Engineering
Volume 144, Issue 7
Abstract
A comprehensive wind tunnel experimental study for -sloped hip roofs of L- and T-shaped low buildings was carried out in a simulated open terrain exposure to examine wind load characteristics and assess the applicability of wind provisions specified by the American wind load standard for such geometries. Results show that considering roof shape effects, hip roofs with rectangular or complex plans perform differently from rectangular gable roofs and incur smaller local and area-averaged suction. For L- and T-shaped hip roofs, distinctive pressure distributions occur, particularly along roof eaves near building re-entrant corners, where considerable suction appears for the wind blowing toward these building re-entrant corners. Furthermore, the building length-to-width aspect ratio effects are in most cases moderate. Generally, the wind load provisions of the American wind load standard are adequate for L- and T-shaped hip roofs, except for the edge zone along ridge and hip with large areas, for which measured values exceed the code-specified wind pressure coefficients. Finally, it was found more appropriate to utilize the entire L- or T-shaped roof dimensions, as opposed to the rectangular section only, to determine the least horizontal dimension of such nonrectangular hip roofs for the definition of roof zones.
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Acknowledgments
The support provided by 111 Project of China (B13002) and China Scholarship Council, China (CSC201507090037) for the first author’s study at Concordia University (November 2015–May 2017) is gratefully acknowledged.
References
Ahmad, S., and K. Kumar. 2002. “Effect of geometry on wind pressures on low-rise hip roof buildings.” J. Wind. Eng. Ind. Aerodyn. 90 (7): 755–779. https://doi.org/10.1016/S0167-6105(02)00152-6.
AIJ (Architectural Institute of Japan). 1993. AIJ recommendations for loads on buildings. Tokyo: AIJ.
Alrawashdeh, H., and T. Stathopoulos. 2015. “Wind pressures on large roofs of low buildings and wind codes and standards.” J. Wind. Eng. Ind. Aerodyn. 147: 212–225. https://doi.org/10.1016/j.jweia.2015.09.014.
ASCE. 2010. Minimum design loads for building and other structures. ASCE/SEI 7-10. Reston, VA: ASCE.
Case, P. C., and N. Isyumov. 1998. “Wind loads on low buildings with 4:12 gable roofs in open country and suburban exposures.” J. Wind. Eng. Ind. Aerodyn. 77–78: 107–118. https://doi.org/10.1016/S0167-6105(98)00136-6.
CEN (European Committee for Standardization). 2004. Eurocode 1: Actions on structures: General actions. Part 1.4: Wind actions. EN 1991-1-4. Brussels, Belgium: CEN.
Cope, A. D., K. R. Gurley, M. Gioffre, and T. A. Reinhold. 2005. “Low-rise gable roof wind loads: Characterization and stochastic simulation.” J. Wind. Eng. Ind. Aerodyn. 93 (9): 719–738. https://doi.org/10.1016/j.jweia.2005.07.002.
Deaves, D. M. 1981. “Computations of wind flow over changes in surface roughness.” J. Wind. Eng. Ind. Aerodyn. 7 (1): 65–94. https://doi.org/10.1016/0167-6105(81)90068-4.
Ding, J., and X. Chen. 2015. “Moment-based translation model for hardening non-Gaussian response processes.” J. Eng. Mech. 142 (2): 06015006. https://doi.org/10.1061/(ASCE)EM.1943-7889.0000986.
ESDU (Engineering Science Data Unit). 1982. Strong winds in the atmospheric boundary layer. Part 1: Mean-hourly wind speeds. London, UK: ESDU.
Gavanski, E., B. Kordi, G. A. Kopp, and P. J. Vickery. 2013. “Wind loads on roof sheathing of houses.” J. Wind. Eng. Ind. Aerodyn. 114: 106–121. https://doi.org/10.1016/j.jweia.2012.12.011.
Gavanski, E., and Y. Uematsu. 2014. “Local wind pressures acting on walls of low-rise buildings and comparisons to the Japanese and US wind loading provisions.” J. Wind. Eng. Ind. Aerodyn. 132: 77–91. https://doi.org/10.1016/j.jweia.2014.06.020.
Gioffrè, M., V. Gusella, and M. Grigoriu. 2000. “Simulation of non-Gaussian field applied to wind pressure fluctuations.” Probab. Eng. Mech. 15 (4): 339–345. https://doi.org/10.1016/S0266-8920(99)00035-1.
Grigoriu, M. 1984. “Crossings of non-Gaussian translation processes.” J. Eng. Mech. 110 (4): 610–620. https://doi.org/10.1061/(ASCE)0733-9399(1984)110:4(610).
Holmes, J. D. 1981. “Non-Gaussian characteristics of wind pressure fluctuations.” J. Wind. Eng. Ind. Aerodyn. 7 (1): 103–108. https://doi.org/10.1016/0167-6105(81)90070-2.
Holmes, J. D. 1983. Wind loads on low-rise buildings—A review. Melbourne, Australia: Commonwealth Scientific and Industrial Research Organization.
Holmes, J. D. 1994. “Wind pressures on tropical housing.” J. Wind. Eng. Ind. Aerodyn. 53 (1–2): 105–123. https://doi.org/10.1016/0167-6105(94)90021-3.
Holmes, J. D., and L. S. Cochran. 2003. “Probability distributions of extreme pressure coefficients.” J. Wind. Eng. Ind. Aerodyn. 91 (7): 893–901. https://doi.org/10.1016/S0167-6105(03)00019-9.
Irwin, P. A. 2006. “Exposure categories and transitions for design wind loads.” J. Struct. Eng. 132 (11): 1755–1763. https://doi.org/10.1061/(ASCE)0733-9445(2006)132:11(1755).
Kanda, M., and E. Maruta. 1993. “Characteristics of fluctuating wind pressure on long low-rise buildings with gable roofs.” J. Wind. Eng. Ind. Aerodyn. 50: 173–182. https://doi.org/10.1016/0167-6105(93)90072-V.
Kikuchi, H., Y. Tamura, K. Hibi, and S. Suganuma. 2001. “Local pressures acting on low-rise and middle-rise buildings with L-shape plan.” J. Wind. Eng. Ind. Aerodyn. 89: 517–520.
Kumar, K. S., and T. Stathopoulos. 2000. “Wind loads on low building roofs: A stochastic perspective.” J. Struct. Eng. 126 (8): 944–956. https://doi.org/10.1061/(ASCE)0733-9445(2000)126:8(944).
Li, Q. S., I. Calderone, and W. H. Melbourne. 1999. “Probabilistic characteristics of pressure fluctuations in separated and reattaching flows for various free-stream turbulence.” J. Wind. Eng. Ind. Aerodyn. 82 (1–3): 125–145. https://doi.org/10.1016/S0167-6105(98)00214-1.
Lin, J. X., and D. Surry. 1998. “The variation of peak loads with tributary area near corners on flat low building roofs.” J. Wind. Eng. Ind. Aerodyn. 77–78: 185–196. https://doi.org/10.1016/S0167-6105(98)00142-1.
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.
Liu, M., X. Chen, and Q. Yang. 2017. “Estimation of peak factor of non-Gaussian wind pressures by improved moment-based Hermite model.” J. Eng. Mech. 143 (7): 06017006. https://doi.org/10.1061/(ASCE)EM.1943-7889.0001233.
Meecham, D., D. Surry, and A. G. Davenport. 1991. “The magnitude and distribution of wind-induced pressures on hip and gable roofs.” J. Wind. Eng. Ind. Aerodyn. 38 (2–3): 257–272. https://doi.org/10.1016/0167-6105(91)90046-Y.
NBCC (National Building Code of Canada). 2015. User’s guide—NBC 2015: Structural commentaries (Part 4). Ottawa: National Research Council of Canada.
Nie, S., X. Zhou, L. Tao, and T. Zhou. 2016. “Wind tunnel test and numerical analysis on wind load characteristics of plan T-shaped low-rise buildings.” [In Chinese.] J. Archit. Civ. Eng. 33 (2): 31–40.
Peng, X., L. Yang, E. Gavanski, K. Gurley, and D. Prevatt. 2014. “A comparison of methods to estimate peak wind loads on buildings.” J. Wind. Eng. Ind. Aerodyn. 126: 11–23. https://doi.org/10.1016/j.jweia.2013.12.013.
Sadek, F., and E. Simiu. 2002. “Peak non-Gaussian wind effects for database-assisted low-rise building design.” J. Eng. Mech. 128 (5): 530–539. https://doi.org/10.1061/(ASCE)0733-9399(2002)128:5(530).
Stathopoulos, T. 1980. “PDF of wind pressures on low-rise buildings.” J. Struct. Div. 106 (5): 973–990.
Stathopoulos, T. 1984a. “Design and fabrication of a wind tunnel for building aerodynamics.” J. Wind. Eng. Ind. Aerodyn. 16 (2–3): 361–376. https://doi.org/10.1016/0167-6105(84)90018-7.
Stathopoulos, T. 1984b. “Wind loads on low-rise buildings: A review of the state of the art.” Eng. Struct. 6 (2): 119–135. https://doi.org/10.1016/0141-0296(84)90005-1.
Stathopoulos, T. 2003. “Wind loads on low buildings: In the wake of Alan Davenport’s contributions.” J. Wind. Eng. Ind. Aerodyn. 91 (12–15): 1565–1585. https://doi.org/10.1016/j.jweia.2003.09.019.
Stathopoulos, T., and H. D. Luchian. 1990. “Wind pressures on buildings with multi-level roofs.” J. Wind. Eng. Ind. Aerodyn. 36: 1299–1308. https://doi.org/10.1016/0167-6105(90)90126-W.
Stathopoulos, T., and A. R. Mohammadian. 1986. “Wind loads on low buildings with mono-sloped roofs.” J. Wind. Eng. Ind. Aerodyn. 23: 81–97. https://doi.org/10.1016/0167-6105(86)90034-6.
Stathopoulos, T., and P. Saathoff. 1991. “Wind pressure on roofs of various geometries.” J. Wind. Eng. Ind. Aerodyn. 38 (2–3): 273–284. https://doi.org/10.1016/0167-6105(91)90047-Z.
Stathopoulos, T., and D. Surry. 1983. “Scale effects in wind tunnel testing of low buildings.” J. Wind. Eng. Ind. Aerodyn. 13 (1–3): 313–326. https://doi.org/10.1016/0167-6105(83)90152-6.
Stathopoulos, T., and K. Wang. 2001. “Wind pressure provisions for gable roofs of intermediate roof slope.” Wind Struct. 4 (2): 119–130. https://doi.org/10.12989/was.2001.4.2.119.
Stathopoulos, T., and Y. Zhou. 1993. “Computation of wind pressures on L-shaped buildings.” J. Eng. Mech. 119 (8): 1526–1541. https://doi.org/10.1061/(ASCE)0733-9399(1993)119:8(1526).
St. Pierre, L. M., G. A. Kopp, D. Surry, and T. C. E. Ho. 2005. “The UWO contribution to the NIST aerodynamic database for wind loads on low buildings. 2: Comparison of data with wind load provisions.” J. Wind. Eng. Ind. Aerodyn. 93 (1): 31–59. https://doi.org/10.1016/j.jweia.2004.07.007.
Tao, L., P. Huang, M. Gu, and Y. Quan. 2011. “Wind loading characteristics of low-rise buildings roof with L-shape plan.” [In Chinese.] J. Tongji Univ. (Natural Science). 39 (11): 1586–1591.
Uematsu, Y., and N. Isyumov. 1999. “Wind pressures acting on low-rise buildings.” J. Wind. Eng. Ind. Aerodyn. 82 (1–3): 1–25. https://doi.org/10.1016/S0167-6105(99)00036-7.
Van de Lindt, J. W., A. Graettinger, R. Gupta, T. Skaggs, S. Pryor, and K. J. Fridley. 2007. “Performance of wood-frame structures during hurricane Katrina.” J. Perform. Constr. Facil. 21 (2): 108–116. https://doi.org/10.1061/(ASCE)0887-3828(2007)21:2(108).
Vickery, P. J., G. A. Kopp, and L. A. Twisdale Jr. 2011. “Component and cladding wind pressures on hip and gable roofs: Components to the US wind loading provisions.” In Proc., 13th Int. Conf. on Wind Engineering. Tokyo, Japan: International Association for Wind Engineering.
Winterstein, S. R. 1988. “Nonlinear vibration models for extremes and fatigue.” J. Eng. Mech. 114 (10): 1772–1790. https://doi.org/10.1061/(ASCE)0733-9399(1988)114:10(1772).
Winterstein, S. R., and T. Kashef. 2000. “Moment-based load and response models with wind engineering applications.” J. Solar Energy Eng. 122 (3): 122–128. https://doi.org/10.1115/1.1288028.
Xu, Y. L., and G. F. Reardon. 1998. “Variations of wind pressure on hip roofs with roof pitch.” J. Wind. Eng. Ind. Aerodyn. 73 (3): 267–284. https://doi.org/10.1016/S0167-6105(97)00291-2.
Yang, L., K. R. Gurley, and D. O. Prevatt. 2013. “Probabilistic modeling of wind pressure on low-rise buildings.” J. Wind. Eng. Ind. Aerodyn. 114: 18–26. https://doi.org/10.1016/j.jweia.2012.12.014.
Yang, Q., and Y. Tian. 2015. “A model of probability density function of non-Gaussian wind pressure with multiple samples.” J. Wind. Eng. Ind. Aerodyn. 140: 67–78. https://doi.org/10.1016/j.jweia.2014.11.005.
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Published In
Journal of Structural Engineering
Volume 144 • Issue 7 • July 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Mar 9, 2017
Accepted: Jan 10, 2018
Published online: May 11, 2018
Published in print: Jul 1, 2018
Discussion open until: Oct 11, 2018
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