Dynamic load modeling of Overhead Transmission Line Towers

Abstract

This study serves to contribute to the ongoing and developing research on the application of dynamic loads to Overhead Transmission line modelling processes. Special focus was on tall overhead transmission line towers. Tall transmission towers usually occur at critical points of a distribution line with most design currently carried out using static loading which is assumed to provide a conservative result. Dynamic load modelling expands the knowledge of the designer as to the true response of a structure under such conditions thereby enabling more informed design. The main results show a reduction of 10% in maximum uplift force for the studied tower when modelled with dynamic loads that included static forces for the conductors. A theoretical reduction of up to 18% was obtained when conductor loads were excluded and static and dynamic response of the tower alone studied and compared. Complete understanding of the tower´s behavior is achieved through the dynamic process enabling more efficient design.