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50 MPа On tan o

50 MPа On tan o

Structural Analysis
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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50 MPa Oc ON tan ф 20 + + -20 MPa 50 MPа 100 MPа O = 90 –20 -50 MPа
Transcribed Image Text:50 MPa Oc ON tan ф 20 + + -20 MPa 50 MPа 100 MPа O = 90 –20 -50 MPа
a) For the Coulomb Failure Envelope above (Fig. 2), we have a test where o3 = -5 MPа (i. e. negative) and 01 is progressively increased. When will the rock fail (what is the 01 = ? at failure (Draw the new circle on Figure 2 to check) b) What are the resolved shear and normal stresses on the fault when the rock fails? c) What is the angle that any new fracture will make to ơ1. d) Will it shear only, shear and dilate, or dilate only? e) What type of structural features (modes) form under those different conditions?
Transcribed Image Text:a) For the Coulomb Failure Envelope above (Fig. 2), we have a test where o3 = -5 MPа (i. e. negative) and 01 is progressively increased. When will the rock fail (what is the 01 = ? at failure (Draw the new circle on Figure 2 to check) b) What are the resolved shear and normal stresses on the fault when the rock fails? c) What is the angle that any new fracture will make to ơ1. d) Will it shear only, shear and dilate, or dilate only? e) What type of structural features (modes) form under those different conditions?
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