Shigen-to-sozai, Vol.118, No.3,4, pp.150-156.
Historical Changes of Rock Mass Modelling and Numerical Technique and the Features of Those
Haruhiko UNOa, Tsuyoshi ISHIDAb and Yoshiaki MIZUTAb
| a. Tokyo Electric Power Services Co., Ltd.
Advanced Engineering Operation Center Civil
Engineering Dept. b. Dr., Faculty of Engineering, Yamaguchi University |
| A lot of methods have been developed in order
to evaluate mechanical behavior of rock mass
containing discontinuities. The methods can
be classified roughly into three categories.
First one is to model the rock mass which
contains many and unspecific discontinuities
by replacing it with an equivalent continuum.
Second one is to analyze failure behavior
of rock mass, modeling all of the discontinuities
as they are, for the rock mass in which specific
joints exist distinctly. Third one is to
analyze formation of shear band as the result
of successive development of micro fractures
and accumulation of those, which depend on
heterogeneity of rock mass. These numerical methods have been rapidly developed since the decade of 1960 when FEM analyses were introduced into rock engineering and computer came into wide use, and further development are still being carried out. Historical changes in development of the numerical methods and the significant features of those am-c described in this report. |
| KEY WORDS: Rock Mass, Discontinuity, Equivalent Continuum, Heterogeneity, Anisotropy |