Evaluation of non-linear analysis of guyed antenna towers

This paper discusses two di€erent ®nite element models used in the analysis of guyed antenna towers. In the ®rst
approach, three dimensional truss elements are used to model the latticed mast of the tower and non-linear cable
elements are used for the guys; this results in a large number of elements and degrees-of-freedom. In the second
approach, the mast is modelled using beam±column elements and non-linear cable elements for the guys. The two
computer models were evaluated using six existing towers subjected to a variety of load combinations involving
dead, wind and ice loads. The results are compared to a simple, but widely used, model in which the tower is
modelled as a beam on non-linear elastic supports. Structural response comparisons include guy tensions, member
axial forces, face shears, mast displacements and mast rotations.