2001 Fiscal Year Final Research Report Summary

Evaluation of Strength of Rock Mass from Property of Intact Rock and Digital Image of Crack Distribution on Outcrops

Research Project

Project/Area Number	12650455
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	土木材料・力学一般
Research Institution	Tohoku University
Principal Investigator	KYOYA Takashi Tohoku University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (00186347)
Project Period (FY)	2000 – 2001
Keywords	Discontinuous Rock mass / Multi-scale analysis / Digital image of Crack distribution
Research Abstract	Mechanical properties of rock mass are strongly governed by the microscopic structure that consists of distributed cracks and various rock materials. In order to evaluate the deformability and the strength of such a rock mass, the numerical scheme of multi-scale which is based on both the homogenization method and the limit load analysis is proposed. The data needed are only the mechanical properties of intact rocks and the digital image of crack distribution, which are easily obtained from laboratory tests and survey in site. The deformability and strength of representative element of rock mass are reasonably evaluated from the homogenization analyzes. And then the limit load of a rock mass structure is also successfully evaluated by the limit load analysis.