Earthquake response of high voltage circuit breakers with non-linear force-deflection characteristics
DOI:
https://doi.org/10.5459/bnzsee.4.2.301-315Abstract
The New Zealand Electricity Department has purchased a number of high voltage circuit breakers with prestressed porcelain columns on which the manufacturers have carried out shock and vibration tests to determine strength and damping characteristics and to make some estimate of earthquake resistance. This paper presents a detailed study of the behaviour of such circuit breakers when subjected to earthquakes and steady-state sinusoidal forging functions. The system, assumed to be single-degree of freedom, has a bilinear force-deflection relationship. The system parameters that varied in this study were: natural period, damping, yield strength and elastic characteristics. All investigations were conducted with the aid of an IBM 360/40 and an IBM 1130 digital computer using Jenning's Pseudo-Earthquakes.
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