This paper presents a study conducted to estimate the remaining theoretical life of one type of 400 kV latticed steel towers installed on a power transmission line in Venezuela. The study focused on determining the structural behavior and vibration characteristics of suspension towers on the fore mentioned line, considering material loss of their structural members due to atmospheric corrosion, in different design conditions. For this purpose, a commercially available FEM code was used to build models to perform structural and modal analysis of the chosen type of tower, in order to determine load effects in the structure (stress and deformation), natural frequencies and mode shapes in each of the different design states. Then, a simple methodology engineered as part of this study leads to prediction of the tower’s service life based on an allowable state of stress and deformation in the tower (direct and vibration-induced) affected by different reliability factors and taking into account corrosion effects and corrosion rates in a particular environment along the transmission line.

This content is only available via PDF.
You do not currently have access to this content.