All the above-mentioned aspects allied to all the difficulties
associated with the investigated tower geometry and to the truss
finite element characteristics highlight the fact that the traditional
truss design is not the best-recommended methodology to be used. It
should be stressed that the large number of dummy bars, adopted to
enable the structural analysis to be performed, is the major
disadvantage of this structural modelling strategy. The used 3D truss
finite element is presented in Fig. 3.
This structural modelling strategy is characterised by the use of
3D beam finite elements with rigid connections. The adopted beam
finite elements presented six degrees of freedom per node associated
with translation and rotation displacements in space, respectively, as
shown in Fig. 3.
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