Structural Engineering and Mechanics

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Reliability of microwave towers against extreme winds

  • Deoliya, Rajesh (Structural Engineering Reseach Centre) ;
  • Datta, T.K. (Department of Civil Engineering, Indian Institute of Technology)
  • Published : 1998.07.25
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Abstract

The reliability of antenna tower designed for a n-year design wind speed is determined by considering the variability of the strength of the component members and of the mean wind speed. For obtaining the n-year design wind speed, maximum annual wind speed is assumed to follow Gumbel Type-1 distribution. Following this distribution of the wind speed, the mean and standard deviation of stresses in each component member are worked out. The variability of the strength of members is defined by means of the nominal strength and a coefficient of variation. The probability of failure of the critical members of tower is determined by the first order second moment method (FOSM) of reliability analysis. Using the above method, the reliability against allowable stress failure of the critical members as well as the system reliabilities for a 75 m tall antenna tower, designed for n-year design wind speed, are presented.

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References

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Cited by

  1. Fatigue Reliability Analysis of Microwave Antenna Towers due to Wind vol.127, pp.10, 2001, https://doi.org/10.1061/(ASCE)0733-9445(2001)127:10(1221)
  2. Reliability analysis of a microwave tower for fluctuating mean wind with directional effect vol.67, pp.3, 2000, https://doi.org/10.1016/S0951-8320(99)00053-8
  3. Reliability analysis of latticed steel towers against wind induced displacement vol.4, pp.1, 2004, https://doi.org/10.12989/scs.2004.4.1.009