DAMAGE AND RESTORATION OF ELECTRIC POWER FACILITIES IN THE NORTHRIDGE CALIFORNIA EARTHQUAKE OF 1994

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  • 1994年ノースリッジ地震による電力設備の被害と復旧

Abstract

On January 17, 1994, the northern part of Los Angeles, California, was heavily shaken by the Northridge earthquake of surface magnitude 6.8. The earthquake had significant effects on residential and commercial buildings and lifeline facilities. This paper focuses on the damage and restoration of electric power facilities. In particular, damage of power facilities by the 1994 Northridge earthquake was compared with that by the 1971 San Fernando Earthquake. Current earthquake resistant practices on the substation equipment both in Japan and USA were also carefully examined. As a result, the effects of revision of earthquake-resistant design criteria for substation equipment were observed. The damage to substation equipment in Japan is expected to be less than that in USA, even if the same level of acceleration as the Northridge Earthquake occurs in Japan.

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