Wind and Structures

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Response of fiber reinforced plastic chimneys to wind loads

  • Awad, A.S. (Mccavour Eng. Ltd.) ;
  • El Damatty, A.A. (Department of Civil and Environmental Engineering, The University of Western Ontario) ;
  • Vickery, B.J. (Department of Civil and Environmental Engineering, The University of Western Ontario)
  • Published : 2000.06.25
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Abstract

Due to their high corrosion and chemical resistance, fiber reinforced plastics (FRP) are becoming widely used as the main structural material for industrial chimneys. However, no national code currently exists for the design of such type of chimneys. The purpose of this study is to investigate analytically the response of FRP chimneys to wind loads. The classical lamination theory is used to substitute the angle-ply laminate of a FRP chimney with an equivalent orthotropic material that provides the same stiffness. Dynamic wind loads are applied to the equivalent chimney to evaluate its response to both along and across wind loads. A parametric study is then conducted to identify the material and geometric parameters affecting the response of FRP chimneys to wind loads. Unlike the across-wind response, the along-wind tip deflection is found to be highly dependent on the angle of orientation of the fibers. In general, the analysis shows that FRP chimneys are very vulnerable to across-wind oscillations resulting from the vortex shedding phenomenon.

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References

  1. ACI1307-95, American Concrete Institute.
  2. Berg, G.V. (1989), Elements of Structural Dynamics, Prentice Hall, Englewood Cliffs, New Jersey.
  3. CICIND Model Code for Steel Chimneys, May 1988.
  4. Davenport, A.G. (1993), "The response of slender structures to wind", Proceedings of the NATO Advanced study Institute At Waldbronn, wind Climates in Cities, Germany.
  5. EUROCOMP (1997), Design Code of FRP.
  6. Koziey, B.L. (1993), Formulation and Applications of Consistent Shell and Beam Elements, Ph.D. Thesis, McMaster University, Hamilton, Canada.
  7. Koziey, B.L. and Mirza, F.A. (1997), "Consistent thick shell element", Computers & Structures, 65(4), 531-549. https://doi.org/10.1016/S0045-7949(96)00414-2
  8. Jones, R.M (1975), Mechanics of Composite Materials, McGraw-Hill Book Company, New York, NY.
  9. Plecnik, J.M., Whitman, W.E., Baker, T.E. and Pham, M. (1984), "Design concepts for tallest free-standing fiberglass stack", Polymer Composites, 5(3), 186-189. https://doi.org/10.1002/pc.750050305
  10. Scurton, C. (1963), "On the wind excited oscillations of stacks, towers and masts", Int. Conference of Wind Effects on Buildings and Structures, N.P.L. Teddington.
  11. Van Koten, H. (1969), "Vortex excitation of slender structures", Proceeding of Conference on Tower-Shaped Structures, The Hague, Int. Assn. Shell Structures.
  12. Vickery, B.J. (1997), "Wind loads & design criteria for chimneys", 8th U.S National Conference on Wind Engineering, Johns Hopkins, Baltimore, Md..
  13. Vickery, B.J. and Basu, R.I. (1983), "Across-wind vibration of structures of circular cross-section", Part I and II, J.W.E. and I.A., 12, 49-97.
  14. Vickery, B.J. and Steckley, A. (1993), "Aerodynamic damping and vortex excitation on an oscillating prism in turbulent shear flow", J.W.E and I.A., 49, 121-140.