Structural Engineering and Mechanics

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Simple method for static and dynamic analyses of guyed towers

  • Meshmesha, H. (Department of Civil and Environmental Engineering, University of Windsor) ;
  • Sennah, K. (Department of Civil Engineering, Ryerson University) ;
  • Kennedy, J.B. (Department of Civil and Environmental Engineering, University of Windsor)
  • Received : 2004.10.13
  • Accepted : 2006.04.17
  • Published : 2006.08.20
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Abstract

The static and dynamic responses of guyed telecommunication towers can be determined by using two models, the space truss element model, and the equivalent beam-column element model. The equivalent beam-column analysis is based on the determination of the equivalent shear, torsion, and bending rigidities as well as the equivalent area of the guyed mast. In the literature, two methods are currently available to determine the equivalent properties of lattice structures, namely: the unit load method, and the energy approach. In this study, an equivalent beam-column analysis is introduced based on an equivalent thin plate approach for lattice structures. A finite-element modeling, using suitably modified ABAQUS software, is used to investigate the accuracy of utilizing the different proposed methods in determining the static and dynamic responses of a guyed tower of 364.5-meter high subjected to static and seismic loading conditions. The results from these analyses are compared to those obtained from a finite-element modeling of the actual structure using 3-D truss and beam elements. Good agreement is shown between the different proposed beam-column models, and the model of the actual structure. However, the proposed equivalent thin plate approach is simpler to apply than the other two approaches.

Keywords

Acknowledgement

Supported by : Natural Science and Engineering Research Council

References

  1. Hibbitt, H.D., Karlsson, B.I. and Sorenson, J. (2000), ABAQUS User s Manual Version 6.2, Hibbitt, Karlsson, and Sorenson Inc., Providence, RI
  2. Kahla, N.B. (1993), 'Equivalent beam-column analyses of guyed towers', Comput. Struct., 55(4), 631-645 https://doi.org/10.1016/0045-7949(94)00489-P
  3. Kollbrunner, C.F. and Basler, K. (1969), Torsion in Structures. Springer-Verlag, Berlin, Germany
  4. Teughels, A. and De Roeck, G. (2000), 'Continuum models for beam and plate like lattice structures', Fourth Int. Colloquium on Computation of Shell & Spatial Structures. June 5-7, Chania - Crete, Greece
  5. Wahba, Y.M. (1999), 'Static and dynamic analysis of guyed antenna towers', Ph.D. Thesis, Department of Civil Engineering, University of Windsor, Windsor, Ontario, Canada

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