EVALUATION OF ROCK MASS STRENGTH BY A HOMOGENIZATION METHOD WITH A WEAK LAYER CONSTITUTIVE MODEL

• KOBAYAKAWA Hiroaki

  （財）電力中央研究所　地球工学研究所地圏科学領域

• KYOYA Takashi

  東北大学　大学院工学研究科土木工学専攻

Bibliographic Information

Other Title

• 亀裂に対する連続体弱層モデルを用いた均質化法による岩盤の強度特性評価

Abstract

A nonlinear elastic constitutive model that describe the increase of a secant Young's modulus by the crack closure is proposed and incorporated into the homogenization method to evaluate the mechanical properties of discontinuous rock mass. The homogenization analysis involving this “weak layer model” simulates an unconfined compression test of a specimen with a single crack and the results are compared with those of the experiment, and the effectiveness of the weak layer model is shown. Then, the proposed method is applied to an evaluation of strength of a rock mass simulating an actual rock shear test. The predicted peak shear stress agrees with those of the real test well, and the potential of the homogenization method with the proposed weak layer model in the field of rock mechanics and rock engineering is shown.

Journal

• Doboku Gakkai Ronbunshuu C

  Doboku Gakkai Ronbunshuu C 63 (2), 428-440, 2007

  Japan Society of Civil Engineers

Keywords

• rock mass
• strength
• crack
• waek layer constitutive model
• crack closure
• homogenization method

Details

• CRID: 1390282680232680320
• NII Article ID: 130004468205
• DOI: 10.2208/jscejc.63.428
• ISSN: 1880604X
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed