Samples from sandstone were collected from two different depths (80m and 200m) and triaxialshearing tests were performed to estimate the shear strength parameters. From each depth, twodifferent specimens were tests at distinct isotropic confining pressures and from theexperiments the deviatoric stress at failure was assessed. The results from these experimentsare summarized in Table 1.1.Table 1.1 – Results of triaxial shearing tests at failure for the sandstone samplescollected from different depths (Question 1)SpecimenNo.q (MPa) at failureCollectionоз (MPa)depth (m)1800.6003.3252801.8008.17932000.6005.31042001.80011.103(a)Determine the angle of shear strength and cohesion of the sandstone for each of the twodifferent depths using the Mohr-Coulomb (linear) failure criterion based on total stressprinciple.(b)During the triaxial test measurements, local strain gauges were attached to the specimensfor high quality measurements to be performed. It was revealed that for the sandstonecollected from a depth of 80 m and tested at 0.6 MPa of isotropic confining pressure, ata volumetric strain of 3.0x10-l%, the material was still in the linear-elastic range ofbehavior. If for the given conditions, the specimen has a true Young's modulus of 0.286GPa, a Poisson's ratio of 0.28 and is assumed to be an isotropic material, determine thedeviatoric stress which corresponds to the said volumetric strain of 3.0x10-l%.Note: Present step-by-step your calculations and summarize your results in the form of table(s)when necessary.

Answered: Determine the angle of shear strength…

Determine the angle of shear strength and cohesion of the sandstone for each of the two (a) different depths using the Mohr-Coulomb (1linear) failure criterion based on total stress principle.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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