... Betonbauwerk und Felsfundamentsohle J.A. BASLAVSKY, M.Sc.(Eng Ass. Prof., S.A. FRID, D.Sc. The S.Ya. Zhuk "Hydroproject" Institute, USSR SUMMARY . A new method of a direct calculation of the strength of a concrete structure contact with a rocky foundation is being developed. This method is based on Griffith's...

... Summary It is postulated that two „coefficients of friction" can be regarded as controlling both fracture initiation in and ultimate failure of isotropic brittle rocks in accordance with either Griffith's original theory or that as modified by McLintock and Walsh. On the basis...

... Cardboard strength fracture initiation Griffith diameter examination brittle material principal stress 0 propagation hydraulic fracturing Brazilian test specimen fracture propagation tensile strength plane end condition fracture contour stress distribution equation...

... Summary Griffith's theory of brittle fracture, modified to account for the frictional effects due to crack closure in compression, has proved a reliable basis for the understanding of fracture initiation in hard rocks. It suffers from the disadvantage that it gives no information...

... to Coulomb-Navier and Griffith. Coulornb-Navier's formula [4.8] is a linear relation between the shear strength and the normal pressure, which means that the strength consists of two parts, one constant term ("0) and one term which can be regarded as an expression for the friction between internal surfaces...

.... If mechanical disintegration (fissures. cracks) prevails, the decrease in the compressive strength and deformation modulus due to saturation can be explained by the adsorption effect, based on the Griffith's theory of brittle fracture. If chemical alteration with clayey products of decay is pronounced...