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Towards guidelines for design of loose-laid roof pavers for wind uplift

  • Mooneghi, Maryam Asghari (Advanced Technology and Research, Arup) ;
  • Irwin, Peter (Department of Civil and Environmental Engineering, International Hurricane Research Center, Florida International University) ;
  • Chowdhury, Arindam Gan (Department of Civil and Environmental Engineering, International Hurricane Research Center, Florida International University)
  • 투고 : 2014.06.03
  • 심사 : 2015.11.02
  • 발행 : 2016.02.25

초록

Hurricanes are among the most costly natural hazards to impact buildings in coastal regions. Building roofs are designed using the wind load provisions of building codes and standards and, in the case of large buildings, wind tunnel tests. Wind permeable roof claddings like roof pavers are not well dealt with in many existing building codes and standards. The objective of this paper is to develop simple guidance in code format for design of loose-laid roof pavers. Large-scale experiments were performed to investigate the wind loading on concrete roof pavers on the flat roof of a low-rise building in Wall of Wind, a large-scale hurricane testing facility at Florida International University. They included wind blow-off tests and pressure measurements on the top and bottom surfaces of pavers. Based on the experimental results simplified guidelines are developed for design of loose-laid roof pavers against wind uplift. The guidelines are formatted so that use can be made of the existing information in codes and standards such as American Society of Civil Engineering (ASCE) 7-10 standard's pressure coefficients for components and cladding. The effects of the pavers' edge-gap to spacer height ratio and parapet height to building height ratio are included in the guidelines as adjustment factors.

키워드

과제정보

연구 과제 주관 기관 : National Science Foundation (NSF)

참고문헌

  1. Aly, A., Gan Chowdhury, A. and Bitsuamlak, G. (2011), "Wind profile management and blockage assessment for a new 12-fan Wall of Wind facility at FIU", Wind Struct., 14(4), 285-300. https://doi.org/10.12989/was.2011.14.4.285
  2. Aly, A.M., Bitsuamlak, G.T. and Chowdhury, A.G. (2012), "Full-scale aerodynamic testing of a loose concrete roof paver system", Eng. Struct., 44, 260-270. https://doi.org/10.1016/j.engstruct.2012.05.008
  3. Amano, T., Fujii, K. and Tazaki, S. (1988), "Wind loads on permeable roof-blocks in roof insulation systems", J. Wind Eng. Ind. Aerod., 29, 39-48. https://doi.org/10.1016/0167-6105(88)90143-2
  4. AS 1170.2 (2011), Australian/New Zealand standard: structural design actions, Standards Australia/Standards New Zealand, Sydney, Australia.
  5. ASCE 7-10 (2010), Minimum Design Loads for Buildings and Other Structures, American Society of Civil Engineers, ASCE, Virginia.
  6. Asghari Mooneghi, M. (2014), Experimental and Analytical Methodologies for Predicting Peak Loads on Building Envelopes and Roofing Systems, FIU Electronic Theses and Dissertations, Paper 1846. http://digitalcommons.fiu.edu/etd/1846.
  7. Asghari Mooneghi, M., Irwin, P. and Gan Chowdhury, A. (2014), "Large-scale testing on wind uplift of roof pavers", J. Wind Eng. Ind. Aerod., 128, 22-36. https://doi.org/10.1016/j.jweia.2014.03.001
  8. Asghari Mooneghi, M., Irwin, P. and Gan Chowdhury, A. (2015), "Partial Turbulence Simulation Method for Small Structures", Proceedings of the14th International Conference on Wind Engineering, Porto Alegre, Brazil, June.
  9. Banks, D. (2011), "Measuring peak wind loads on solar power assemblies", Proceedings of the 13th International Conference on Wind Engineering, Amsterdam, Netherlands, July.
  10. Banks, D., Meroney, R.N., Sarkar, P.P., Zhao, Z. and Wu, F. (2000), "Flow visualization of conical vortices on flat roofs with simultaneous surface pressure measurement", J. Wind Eng. Ind. Aerod., 84(1), 65-85. https://doi.org/10.1016/S0167-6105(99)00044-6
  11. Bienkiewicz, B. and Endo, M. (2009), "Wind considerations for loose-laid and photovoltaic roofing systems", Proceedings of the Structures Congress, Austin, Texas, April-May.
  12. Bienkiewicz, B. and Meroney, R.N. (1988), "Wind effects on roof ballast pavers", Eng. Struct., 114(6), 1250-1267. https://doi.org/10.1061/(ASCE)0733-9445(1988)114:6(1250)
  13. Bienkiewicz, B. and Sun, Y. (1992), "Wind-tunnel study of wind loading on loose-laid roofing system", J. Wind Eng. Ind. Aerod., 43(1-3), 1817-1828. https://doi.org/10.1016/0167-6105(92)90599-6
  14. Bienkiewicz, B. and Sun, Y. (1997), "Wind loading and resistance of loose-laid roof paver systems", J. Wind Eng. Ind. Aerod., 72, 401-410. https://doi.org/10.1016/S0167-6105(97)00235-3
  15. Bitsuamlak, G., Dagnew, A. and Gan Chowdhury, A. (2010), "Computational assessment of blockage and wind simulator proximity effects for a new full-scale testing facilit", Wind Struct., 13, 21-36. https://doi.org/10.12989/was.2010.13.1.021
  16. Bitsuamlak, G.T., Gan Chowdhury, A. and Sambare, D. (2009), "Application of a full-scale testing facility for assessing wind-driven-rain intrusion", Build. Environ., 44(12), 2430-2441. https://doi.org/10.1016/j.buildenv.2009.04.009
  17. Bofah, K.K., Gerhardt, H.J. and Kramer, C. (1996), "Calculations of pressure equilibration underneath loose-laid, flow permeable roof insulation boards", J. Wind Eng. Ind. Aerod., 59(1), 23-37. https://doi.org/10.1016/0167-6105(95)00028-3
  18. Building Research Establishment (1985), Digest 295: Stability under wind load of loose-laid external roof insulation boards, Building Research Station, Garston, Watford, UK.
  19. Cheung, J.C.K. and Melbourne, W.H. (1986), "Wind loads on porous cladding", Proceedings of the 9th Australasian Fluid Mechanics conference, Auckland, New Zealand, December.
  20. Cheung, J.C.K. and Melbourne, W.H. (1988), "Wind loading on a porous roof", J. Wind Eng. Ind. Aerod., 29(1-3), 19-28. https://doi.org/10.1016/0167-6105(88)90141-9
  21. Chowdhury, A.G., Bitsuamlak, G., Fu, T.C. and Kawade, P. (2012), "A study on roof vents subjected to simulated hurricane effects", Nat. Hazards, 12, 158-165.
  22. DEUTSCHE NORM (2001-03), DIN 1055-4: Einwirkungen auf Tragwerke, Teil 4: Windlasten.
  23. ESDU (1985), Characteristics of Atmospheric Turbulence Near the Ground, Part II: Single Point Data for Strong Winds (Neutral Atmosphere), London UK.
  24. Fernandez, G., Masters, F.J. and Gurley, K.R. (2010), "Performance of hurricane shutters under impact by roof tiles", Eng. Struct., 32(10), 3384-3393. https://doi.org/10.1016/j.engstruct.2010.07.012
  25. Florida Public Hurricane Loss Projection Model (FPHLPM) (2005), Predicting the Vulnerability of Typical Residential Buildings to Hurricane Damage: Vol. II, International Hurricane Research Center, Florida International University.
  26. Gerhardt, H.J. and Janser, F. (1995), "Windbelastung belufteter Fassadensysteme", Bauingenieur, 70, 193-201.
  27. Gerhardt, H.J., Kramer, C. and Bofah, K.K. (1990), "Wind loading on loosely laid pavers and insulation boards for flat roofs", J. Wind Eng. Ind. Aerod., 36, 309-318. https://doi.org/10.1016/0167-6105(90)90315-4
  28. Geurts, C.P.W. (2000), "Wind loads on permeable roof covering products", Fourth Colloquium on Bluff Body Aerodynamics and Applications, Ruhr Universitat Bochum, September.
  29. Habte, F., Asghari Mooneghi, M., Gan Chowdhury, A. and Irwin, P. (2015), "Full-scale testing to evaluate the performance of standing seam metal roofs under simulated wind loading", Eng. Struct., 105, 231-248. https://doi.org/10.1016/j.engstruct.2015.10.006
  30. Harris, R.I. and Deaves, D.M. (1981), The Structure of Strong Winds, London, UK.
  31. Ho, T.C.E., Surry, D., Morrish, D. and Kopp, G.A. (2005), "The UWO contribution to the NIST aerodynamic database for wind loads on low buildings: Part 1. Archiving format and basic aerodynamic data", J. Wind Eng. Ind. Aerod., 93(1), 1-30. https://doi.org/10.1016/j.jweia.2004.07.006
  32. Holmes, J.D. (2015), Wind Loading of Structures, 3rd Ed., CRC Press, Boca Raton, Florida.
  33. Huang, P., Mirmiran, A., Chowdhury, A.G., Abishdid, C. and Wang, T.L. (2009), "Performance of Roof Tiles under Simulated Hurricane Impact", J. Architect. Eng., 15(1), 26-34. https://doi.org/10.1061/(ASCE)1076-0431(2009)15:1(26)
  34. International Standard (2009), ISO 4354, Wind actions on structures.
  35. Irwin, P. (2009), "Wind engineering research needs, building codes and project specific studies", Proceedings of the 11th Americas Conference on Wind Engineering, San Juan, Puerto Rico, June.
  36. Irwin, P., Cooper, K. and Girard, R. (1979), "Correction of distortion effects caused by tubing systems in measurements of fluctuating pressures", J. Wind Eng. Ind. Aerod., 5(1-2), 93-107. https://doi.org/10.1016/0167-6105(79)90026-6
  37. Irwin, P., Dragoiescu, C., Cicci, M. and Thompson, G. (2012), "Wind tunnel model studies of aerodynamic lifting of roof pavers", Proceedings of the Advances in Hurricane Engineering Conference, Miami, Florida, October.
  38. Kargarmoakhar, R., Gan Chowdhury, A. and Irwin, P. (2015), "Reynolds number effects on twin box girder long span bridge aerodynamics", Wind Struct., 20(2), 327-347. https://doi.org/10.12989/was.2015.20.2.327
  39. Kind, R.J. (1994), "Predicting pressure distribution underneath loose laid roof cladding systems", J. Wind Eng. Ind. Aerod., 51(3), 371-379. https://doi.org/10.1016/0167-6105(94)90069-8
  40. Kind, R.J., Savage, M.G. and Wardlaw, R.L. (1987), Further wind tunnel tests of loose-laid roofing systems, National Research Council of Canada, Report LTR-LA-294.
  41. Kind, R.J., Savage, M.G. and Wardlaw, R.L. (1988), "Prediction of wind-induced failure of loose laid roof cladding systems", J. Wind Eng. Ind. Aerod., 29(1-3), 29-37. https://doi.org/10.1016/0167-6105(88)90142-0
  42. Kind, R.J. and Wardlaw, R.L. (1979), Model studies of the wind resistance of two loose-laid roof-insulation systems, National Research Council Canada, Report LTR-LA-234.
  43. Kind, R.J. and Wardlaw, R.L. (1982), "Failure mechanisms of loose laid roof insulation systems", J. Wind Eng. Ind. Aerod., 9(3), 325-341. https://doi.org/10.1016/0167-6105(82)90022-8
  44. Kopp, G.A. and Banks, D. (2013), "Use of the wind tunnel test method for obtaining design wind loads on roof-mounted solar arrays", J. Struct. Eng.-ASCE, 139, 284-287. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000654
  45. Kopp, G.A., Surry, D. and Mans, C. (2005), "Wind effects of parapets on low buildings: Part 1. Basic aerodynamics and local loads", J. Wind Eng. Ind. Aerod., 93(11), 817-841. https://doi.org/10.1016/j.jweia.2005.08.006
  46. Kumar, K.S. and Stathopoulos, T. (1998), "Spectral density functions of wind pressures on various low building roof geometries", Wind Struct., 1, 203-223. https://doi.org/10.12989/was.1998.1.3.203
  47. Lin, J.X. and Surry, D. (1998), "The variation of peak loads with tributary area near corners on flat low building roofs", J. Wind Eng. Ind. Aerod., 77-78, 185-196. https://doi.org/10.1016/S0167-6105(98)00142-1
  48. Lin, J.X., Surry, D. and Tieleman, H.W. (1995), "The distribution of pressure near roof corners of flat roof low buildings", J. Wind Eng. Ind. Aerod., 56(2-3), 235-265. https://doi.org/10.1016/0167-6105(94)00089-V
  49. Masters, F.J., Gurley, K.R., Shah, N. and Fernandez, G. (2010), "The vulnerability of residential window glass to lightweight windborne debris", Eng. Struct., 32(4), 911-921. https://doi.org/10.1016/j.engstruct.2009.12.016
  50. Melbourne, W.H. (1980), "Turbulence effects on maximum surface pressures-a mechanism and possibility of reduction", Wind Eng., 1, 541-551.
  51. Mooneghi, M., Irwin, P. and Chowdhury, A. (2014), "Wind uplift of concrete roof pavers", Proceedings of the Structures Congress 2014, April.
  52. NBCC (1995), User's Guide-NBC 1995, National Research Council of Canada, Ottawa, Canada.
  53. NEN EN 1991-1-4/NA Eurocode: Actions on structures-General actions-Part 1.4: Wind actions.
  54. Oh, J.H. and Kopp, G.A. (2012), "Pressure equalization and analytical solutions for pressures between double-layer envelopes", Proceedings of the 3rd American Association for Wind Engineering Workshop, Hyannis, Massachusetts, USA, August.
  55. Oh, J.H. and Kopp, G.A. (2014), "Modelling of spatially and temporally-varying cavity pressures in air-permeable, double-layer roof systems", Build. Environ., 82, 135-150. https://doi.org/10.1016/j.buildenv.2014.08.008
  56. Oh, J.H. and Kopp, G.A. (2015), "An experimental study of pressure distributions within an air-permeable, double-layer roof system in regions of separated flow", J. Wind Eng. Ind. Aerod., 138, 1-12. https://doi.org/10.1016/j.jweia.2014.12.006
  57. Oh, J.H., Kopp, G.A. and Inculet, D.R. (2007), "The UWO contribution to the NIST aerodynamic database for wind loads on low buildings: Part 3. Internal pressures", J. Wind Eng. Ind. Aerod., 95(8), 755-779. https://doi.org/10.1016/j.jweia.2007.01.007
  58. Pierre, L.M.S., Kopp, G.A., Surry, D. and Ho, T.C.E. (2005), "The UWO contribution to the NIST aerodynamic database for wind loads on low buildings: Part 2. Comparison of data with wind load provisions", J. Wind Eng. Ind. Aerod., 93(1), 31-59. https://doi.org/10.1016/j.jweia.2004.07.007
  59. 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. Aerod., 95(9-11), 1384-1399. https://doi.org/10.1016/j.jweia.2007.02.005
  60. Saathoff, P.J. and Melbourne, W.H. (1997), "Effects of free-stream turbulence on surface pressure fluctuation in a separation bubble", J. Fluid Mech., 337, 1-24. https://doi.org/10.1017/S0022112096004594
  61. Smith, T.L. (1994), Hurricane Andrew provides insights on roof damage, National Roofing Contractors Association, Professional Roofing, 36-44.
  62. Stathopoulos, T. (1982), "Wind pressure on low buildings with parapets", J. Struct. Division, 108(12), 2723-2736.
  63. Stathopoulos, T. and Baskaran, A. (1988), "Turbulent wind loading on roofs with parapet configurations", Can. J. Civil Eng., 29, 570-578.
  64. Sun, Y. and Bienkiewicz, B. (1993), "Numerical simulation of pressure distributions underneath roofing paver systems", J. Wind Eng. Ind. Aerod., 46-47, 517-526. https://doi.org/10.1016/0167-6105(93)90319-J
  65. Tieleman, H.W. (2003), "Wind tunnel simulation of wind loading on low-rise structures: a review", J. Wind Eng. Ind. Aerod., 91(12-15), 1627-1649. https://doi.org/10.1016/j.jweia.2003.09.021
  66. Trung, V., Tamura, Y. and Yoshida, A. (2010). "Numerical computation for lower surface pressures on a porous sunshade roof cover sheet", Proceedings of the 5th International Symposium on Computational Wind Engineering (CWE2010), Chapel Hill, North Carolina, USA, January.
  67. Yamada, H. and Katsuchi, H. (2008). "Wind-tunnel study on effects of small-scale turbulence on flow patterns around rectangular cylinder", Proceedings of the 6th International Colloquium on Bluff Bodies Aerodynamics & Applications, Italy, July.

피인용 문헌

  1. Large-Scale Wind Tunnel Tests of Canopies Attached to Low-Rise Buildings vol.23, pp.1, 2017, https://doi.org/10.1061/(ASCE)AE.1943-5568.0000235
  2. Large-Scale Experimentation Using the 12-Fan Wall of Wind to Assess and Mitigate Hurricane Wind and Rain Impacts on Buildings and Infrastructure Systems vol.143, pp.7, 2017, https://doi.org/10.1061/(ASCE)ST.1943-541X.0001785
  3. Wind pressures on different roof shapes of a finite height circular cylinder vol.24, pp.1, 2016, https://doi.org/10.12989/was.2017.24.1.025