Effects of fault geometry and subsurface structure model on the strong motion and surface rupture induced by the 2014 kamishiro fault nagano earthquake

N. Iwata, R. Kiyota, Aydan, T. Ito, F. Miura

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

Abstract

The authors used a three-dimensional finite element method (3D-FEM) to examine a series of fault rupture simulations for the 2014 Northern Nagano Earthquake and simultaneously estimate the displacement and strong motions. The computational results confirmed that the maximum responses of ground motions and displacement could be simultaneously evaluated using the appropriate constitutive parameters and fine FEM mesh. However, the duration of the acceleration response and shape of the surface displacement waves were not well simulated. In this study, we examined the influence of the fault bend at a shallow depth and P-and S-wave velocity structure models based on a geological survey. As a result, by taking account of bending of the fault plane and the elastic velocity structure at a shallow depth, it was possible to perform a seismic behaviour analysis using the 3D-FEM approach.

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
Pages225-231
Number of pages7
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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