Shear Strength Chapter 10 Mohrs Failure Criterion 1 4/13/2015 - PDF document

4/13/2015 Shear Strength Chapter 10 Mohr’s Failure Criterion � � � � � 1

4/13/2015 Coulomb’s Failure Criterion N Shear force, T Failure plane T friction angle T cohesion N Normal force, N Mohr ‐ Coulomb Failure Criterion friction angle cohesion 2

4/13/2015 Mohr ‐ Coulomb Failure Criterion effective friction angle effective stress cohesion Mohr ‐ Coulomb Failure Envelope C B A 3

4/13/2015 Mohr ‐ Coulomb Failure Envelope Failure Plane Orientation 90° � �′ 4

4/13/2015 Failure Plane Orientation Direct Shear Test Chapter 10.4 5

4/13/2015 Direct Shear Test Direct Shear Test 6

4/13/2015 Direct Shear Test Shear Box Porous Stones Load Plates Direct Shear Test Shear Box Porous Stones Load Plates 7

4/13/2015 Direct Shear Test Vertical LVDT Horizontal LVDT Load Cell Shear Box Weight Hanger Direct Shear Test dilation contraction 8

4/13/2015 Direct Shear Test Direct Shear Test 9

4/13/2015 Direct Shear Test � � � tan �� 0.4598 � 24.7° 10

4/13/2015 Direct Shear Test Upper Lower Shear Box Shear Box Load Plate Triaxial Shear Test Chapter 10.5 11

4/13/2015 Triaxial Shear Test Triaxial Shear Test 12

4/13/2015 Triaxial Shear Test Triaxial Shear Test 13

4/13/2015 Consolidated ‐ Drained Test Consolidated ‐ Drained Test Start of Consolidation Phase u c =  3 14

4/13/2015 Consolidated ‐ Drained Test Consolidated ‐ Drained Test 15

4/13/2015 Consolidated ‐ Drained Test Consolidated ‐ Drained Test L OOSE S AND D ENSE S AND OR NC C LAY OR OC C LAY 16

4/13/2015 Consolidated ‐ Drained Test 17

4/13/2015 Consolidated ‐ Drained Test Example 18

4/13/2015 Example Example 19

4/13/2015 Example 20