Study on Vertical Motions by Rocking Responses of Reactor Buildings

Rikiro Kikuchi, Katsuichirou Hijikata, Takayuki Koyanagi, Mitsugu Mashimo, Shinya Tanaka, Atsushi Suzuki, Yoshinori Mihara

Research output: Contribution to journalArticle

Abstract

Earthquake observation records were observed in reactor buildings of Kashiwazaki-Kariwa Nuclear Power Plant Site during the Niigata-ken Chuetsu-oki earthquake in 2007 (NCO). Some studies on the seismic response and simulation analyses were performed to investigate dynamic characteristics of the structures. In particular, it was clarified that the vertical motions of the reactor building of Unit 6 were greater than those of adjacent reactor buildings of Unit 5 and Unit 7. This paper discusses the causes of this by earthquake observation records and simulation analyses of the reactor buildings. In general, seismic response of vertical motions is relatively well-simulated using lumped mass model with stick elements that have vertical stiffness and with the soil spring between the basemat and support ground. However, vertical motions are influenced by rocking motions with horizontal response in some cases. This paper focuses on relationships between the vertical responses and the vertical motions induced by the rocking motions with simulation analyses and observation records during both NCO earthquake and aftershock of NCO. The reasons why the vertical motions of the reactor building of Unit 6 were larger are discussed.

Original languageEnglish
Pages (from-to)609-618
Number of pages10
JournalJournal of Disaster Research
Volume7
Issue number5
Publication statusPublished - 2012 Oct
Externally publishedYes

Fingerprint

Earthquakes
Seismic response
Ground supports
Nuclear power plants
Stiffness
Soils

Keywords

  • Kashiwazaki-Kariwa Nuclear Power Plant Site (KK-NPS)
  • Reactor building
  • Rocking motion
  • Seismic response analysis
  • The Niigata-ken Chuetsu-oki earthquake in 2007 (NCO)

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Safety, Risk, Reliability and Quality

Cite this

Kikuchi, R., Hijikata, K., Koyanagi, T., Mashimo, M., Tanaka, S., Suzuki, A., & Mihara, Y. (2012). Study on Vertical Motions by Rocking Responses of Reactor Buildings. Journal of Disaster Research, 7(5), 609-618.

Study on Vertical Motions by Rocking Responses of Reactor Buildings. / Kikuchi, Rikiro; Hijikata, Katsuichirou; Koyanagi, Takayuki; Mashimo, Mitsugu; Tanaka, Shinya; Suzuki, Atsushi; Mihara, Yoshinori.

In: Journal of Disaster Research, Vol. 7, No. 5, 10.2012, p. 609-618.

Research output: Contribution to journalArticle

Kikuchi, R, Hijikata, K, Koyanagi, T, Mashimo, M, Tanaka, S, Suzuki, A & Mihara, Y 2012, 'Study on Vertical Motions by Rocking Responses of Reactor Buildings', Journal of Disaster Research, vol. 7, no. 5, pp. 609-618.
Kikuchi R, Hijikata K, Koyanagi T, Mashimo M, Tanaka S, Suzuki A et al. Study on Vertical Motions by Rocking Responses of Reactor Buildings. Journal of Disaster Research. 2012 Oct;7(5):609-618.
Kikuchi, Rikiro ; Hijikata, Katsuichirou ; Koyanagi, Takayuki ; Mashimo, Mitsugu ; Tanaka, Shinya ; Suzuki, Atsushi ; Mihara, Yoshinori. / Study on Vertical Motions by Rocking Responses of Reactor Buildings. In: Journal of Disaster Research. 2012 ; Vol. 7, No. 5. pp. 609-618.
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