A study of formations of a sliding surface during an earthquake

T. Kawai, S. Nakamura, M. Shinoda, K. Watanabe, S. Nakajima, K. Abe, H. Nakamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Evaluating the seismic stability of a rock slope typically involves searching for the minimum value of calculated safety factors (SF) for each supposed sliding block. Because only the transient equilibrium is evaluated, the likelihood of any slope failure can be deemed negligible if all the calculated SFs are greater than unity. However, even if some of the calculated SF are less than unity, it cannot be assumed that all such slopes will collapse. Recently, in the wake of extremely large earthquakes in Japan, the design earthquake standards for nuclear power plants (NPP) have been extended. After the experience of the 2011 off the Pacific coast of Tohoku Earthquake, the designer is expected to consider beyond design basis earthquakes to determine whether more can reasonably be done to reduce the potential for damage, especially where major consequences may ensue (IAEA, 2011). With this in mind, the method employed to evaluate the seismic performance of the slopes surrounding an NPP needs to be capable of doing more than determing the likelihood of failure: it must also to consider the process toward failure in the event of an earthquake beyond the design basis. In this paper, a detailed study of formations of a sliding surface was conducted by using a series of model shaking table tests, and then some issues to be considered toward inplementation of a new evaluation method on seismic performance of a slope are indicated.

Original languageEnglish
Title of host publicationRock Dynamics Summit - Proceedings of the 2019 Rock Dynamics Summit, RDS 2019
EditorsOmer Aydan, Takashi Ito, Takafumi Seiki, Katsumi Kamemura, Naoki Iwata
PublisherCRC Press/Balkema
Pages451-456
Number of pages6
ISBN (Print)9780367347833
DOIs
Publication statusPublished - 2019
EventRock Dynamics Summit, RDS 2019 - Okinawa, Japan
Duration: 2019 May 72019 May 11

Publication series

NameRock Dynamics Summit - Proceedings of the 2019 Rock Dynamics Summit, RDS 2019

Conference

ConferenceRock Dynamics Summit, RDS 2019
Country/TerritoryJapan
CityOkinawa
Period19/5/719/5/11

ASJC Scopus subject areas

  • Geology

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