Numerical simulation of Riedel shear bands formation considering effects of geometrical barrier on strike-slip fault

Tomohiro Toyoda, T. Noda, S. Yamada, A. Asaoka

Research output: Contribution to conferencePaperpeer-review

Abstract

Displacements of strike-slip faults generate Riedel shear bands and flower structures at the surface ground above the faults. This paper aims to simulate deformation of strike-slip deformation of the surface ground considering jogs as geometrical imperfections. Analyses are based on the GEOASIA with SYS Cam-clay model that considers overconsolidation, which allows us to simulate softening behavior of brittle materials. Since the analytical results consider the presence of jogs, fractal shear zones (duplexes), P-shear, R/R'-shear, outer shear/splay shear, and tulip/palm-tree structures are successfully simulated. Furthermore, in terms of the scale effect, Riedel shear bands fractally appear when setting same overconsolidation ratio at the bottom of models.

Original languageEnglish
Publication statusPublished - 2020 Jan 1
Externally publishedYes
Event16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019 - Taipei, Taiwan, Province of China
Duration: 2019 Oct 142019 Oct 18

Conference

Conference16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019
CountryTaiwan, Province of China
CityTaipei
Period19/10/1419/10/18

Keywords

  • Elasto-plasticity
  • FEM
  • Jog
  • Riedel shear band
  • Strike-slip fault

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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