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Shear Strength

Chapter 10

Mohr’s Failure Criterion

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Normal force, N

She

ar f

orce

, T

Coulomb’s Failure Criterion

Failureplane

N

N

T

T

cohesion

friction angle

Mohr‐Coulomb Failure Criterion

cohesion

friction angle

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Mohr‐Coulomb Failure Criterion

effective stress cohesion

effective friction angle

Mohr‐Coulomb Failure Envelope

A

C

B

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Mohr‐Coulomb Failure Envelope

Failure Plane Orientation

90° ′

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Failure Plane Orientation

Direct Shear Test

Chapter 10.4

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Direct Shear Test

Direct Shear Test

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Direct Shear Test

Shear Box

Porous Stones

Load Plates

Direct Shear Test

Shear Box

Porous Stones

Load Plates

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Direct Shear Test

Vertical LVDT Horizontal LVDT

Load Cell

WeightHanger

ShearBox

Direct Shear Test

dilation

contraction

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Direct Shear Test

Direct Shear Test

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Direct Shear Test

tan 0.4598 24.7°

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Direct Shear Test

Load Plate

LowerShear Box

UpperShear Box

Triaxial Shear Test

Chapter 10.5

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Triaxial Shear Test

Triaxial Shear Test

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Triaxial Shear Test

Triaxial Shear Test

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Consolidated‐Drained Test

Consolidated‐Drained Test

uc =3

Start ofConsolidationPhase

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Consolidated‐Drained Test

Consolidated‐Drained Test

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Consolidated‐Drained Test

Consolidated‐Drained Test

LOOSE SANDOR NC CLAY

DENSE SANDOR OC CLAY

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Consolidated‐Drained Test

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Consolidated‐Drained Test

Example

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Example

Example

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Example