Effects of the Miyagi-Ken-Oiki : Earthquake on Reinforced Concrete Structures


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Title: Effects of the Miyagi-Ken-Oiki : Earthquake on Reinforced Concrete Structures

Author(s): Peter I. Yanev

Publication: Concrete International

Volume: 3

Issue: 11

Appears on pages(s): 42-48

Keywords: concrete construction; damage; earth-quake resistant structures; earthquakes; nuclear reactors: reinforced concrete; structural analysis; structural design.

Date: 11/1/1981

The M 7.4 Miyagi-Ken-oki, Japan, earthquake of June 12, 1978 affected a variety of reinforced concrete structures in the metropolitan area of the city of Sendai. Hundreds of modern structures were su-jected to peak ground accelerations in the range of 0.2g to 0.4g. The duration of the strong motion war more than 30 sec. Peak floor-response accelerations in concrete structures reached 1 .Og. Although several structures were damaged extensively, the performance of the majority of the structures was excellent. The response of several structures is described, including a nuclear power plant; damage is summarized; some strong-motion records are presented; and various causes of damage are examined.