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GEO5

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Barton - Bandis

The Barton-Bandis shear strength failure criterion for the rock mass takes the following form:

where:

JRC

-

joint roughness coefficient

σn

-

normal stress acting on the surface of the rock joint

JCS

-

joint compressive strength

φb

-

basic angle of internal friction of the slip surface

If possible the shear strength parameters should be determined from in-situ measurements. Approximate ranges of parameters of the Barton-Bandis failure criterion are given here.