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Probability of exceeding the serviceability limit of antenna masts

  • Published : 2001.08.25
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Abstract

With respect to serviceability, antenna masts should be designed so that wind-induced motion will not cause unacceptable lack of transmission for broadcasting users and wireless communication. For such antenna masts with directional radio transmission the serviceability limit state is predominantly governed by the tolerable change of the broadcasting angle of the mounted antenna assembly and therefore by the tip distortion of the mast. In this paper it will be shown that refinements of the present state of design of antenna masts are possible by using the statistics of extremes applied to extreme wind situations and by consideration of the statistical and reliability requirements given by the operator such as frequency and return period of passing the serviceability limit.

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References

  1. Bundespost-ZTV, Federal Postal Administration, May 1986 [in German].
  2. DIN 4131 Nov. 1991. Steel radio towers and masts [German code].
  3. DIN 4228 Febr. 1989. Factory-produced concrete masts [German code].
  4. Eurocode 1 ENV 1991-2-4 (1995), Basis of Design and Actions on Structures, Part 2.4 : Wind Actions.
  5. Eurocode 3 ENV 1993-3-1 (1997), Design of Steel Structures, Part 3.1: Towers and Masts.
  6. Gumbel, E.J. (1958), Statistics of Extremes. Columbia Press. New York.
  7. Gusella, V. and Spinelli, P. (1989), "Wind loading and structural response of a large broadcasting antenna", Recent Advances in Wind Engineering, 2, International Academic Publication, Pergamon Press.
  8. Holmes, J.D., Banks, R.W. and Roberts, G. (1993), "Drag and aerodynamic interference on microwave dish antennas and their supporting towers", J. Wind Eng. Ind. Aerod., 50, Elsevier.
  9. Kammel, C., Sedlacek, G, Langer, W. and Rennert, R. (1999), "Static and dynamic deformation of steel antenna masts", Final Report of the Research Project No. P298. Studiengesellschaft Stahlanwendung e.V., Dusseldorf [in German].
  10. Kammel, C., Ruscheweyh, H. and Langer, W. (1997), "Static and dynamic deformation of steel antenna masts", Proc. of 2nd EACWE, Genova.
  11. Kammel, C. (1999), "Probability of exceeding the serviceability limit of antenna masts", Wind Engineering into the 21st century, 1, Proc. of the 10th ICWE. Copenhagen.
  12. Kammel, C. (1999), "Probability of exceeding the serviceability limit of antenna masts", Wind-induced Vibration of Structures. Proc. of the 6th WTG-D-A-CH-Meeting. Berlin [in German].
  13. Kasperski, M. (1992), "Storm weather situations in 1990a statistical review", Bauingenieur 67, Springer.Verlag [in German].
  14. Langer, W., Ruscheweyh, H. and Verwiebe, C. (1996), "Investigation of the crosswind vibration behavior of fullscale steel stacks", Final Report of the Research Project No. P230, Studiengesellschaft Stahlanwendung e.V., Dusseldorf [in German].
  15. Quadflieg, H. (1975), "Aerodynamical aspects of reducing vortex-induced alternating forces at cylindrical structures", Institut fur Leichtbau. RWTH Aachen [in German].
  16. Solari, G. (1993), "Gust buffeting. I : Peak wind velocity and equivalent pressure; II: Dynamic alongwind response", J. Struct. Eng., ASCE., 119(2).
  17. Zeng, Y.G., Chen, J.J. and Sun, H.A. (1996), "Dynamic reliability analysis of antenna reflector accuracy under wind excitation", Comp. Struct., 59(5).