50 MPа On tan o
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:50
MPa
Oc
ON tan ф
20
+
+
-20
MPa
50
MPа
100
MPа
O = 90 –20
-50
MPа

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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