New approach to quantifying rock joint roughness based on roughness mobilization characteristics

Eun Soo Hong, In Mo Lee, Gye Chun Cho, Seok Won Lee

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

This study explores the effect of normal stress levels and asperity scales on roughness mobilization characteristics through joint shear tests, and suggests a new method for quantifying rock joint roughness. Two-dimensional joint surface profiles were scanned by using a digital camera-based 3D scanner system, and were classified into a small scale of roughness (unevenness) and a large scale of undulation (waviness). Joint surface profile specimens, duplicated using a wire-cut electric discharge machining method, were tested for shear behaviors. For waviness showing non-stationary signals, the mobilized roughness is not constant but varies nonlinearly at normal stress levels. However, for unevenness showing noise and a stationary signal, the ultimate shear strength appears at a low normal stress level.

Original languageEnglish
Pages (from-to)984-991
Number of pages8
JournalKSCE Journal of Civil Engineering
Volume18
Issue number4
DOIs
Publication statusPublished - 2014 May

Keywords

  • mobilization
  • quantification
  • rock joint
  • roughness
  • roughness classification
  • shear mode

ASJC Scopus subject areas

  • Civil and Structural Engineering

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