Conference,

CONTRIBUTION TO LINE DESIGN BY ACCURATE PREDETERMINATION OF SEVERE BUT OCCASIONAL STRESSES

, and .
(1990)

Abstract

The design cf overhead lines must consider both static stresses <such as extreme temperatures, ice, asy mietrical ice, wind, erection leads, combined loadings, etc ... > and dynamic stresses <such as conductor breakage, ice shedding, galopping, short-circuit, wind gusts), Generally, if static loads can be easily evaluated, such is net the case for dynamic overloads which occur only very occasionally. The predetermination of such overloads with a guaranteed accuracy <mainly through empirical correlations> would enable the designer to accept reduced factors of safety, and hence to red~ce the overall cost of a line while maintaining its reliability. This report provides such a tool, which is also suitable for the calculations of stresses under static conditicns,even in complex combinations,taking particularly into account the flexibility cf the supports.

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