A MODEL FOR THE DETERMINATION OF THE CRITICAL BUCKLING LOAD OF SELF-SUPPORTING LATTICE TOWERS
DOI:
https://doi.org/10.4314/njt.371.1577Keywords:
Lattice Tower, Beam-column, Buckling load, Truss.Abstract
Most tall columns under axial load fail by buckling. Considering the widespread use of this type of structure and the critical role it plays in service delivery, its failure will result in possible loss of lives and property and disruption of services. It is therefore necessary to evolve alternative methods of determination of the buckling load of self-supporting lattice towers. This paper therefore proposes a simple model for the determination of the critical buckling load of self- supporting lattice towers. The proposed model idealizes the lattice tower as an equivalent solid beam-column whose cross-sectional-dimensions are the unknowns to be determined. The expression is proposed by the model for the critical buckling load of self- supporting lattice tower, whose equivalent solid beam-column has a dimension b at its free end. The results obtained using the proposed model are shown to be acceptable, with a percentage difference of about0.036% when compared with results obtained using conventional methods.
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