1128
Proceedings of the 18
th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
0
1
2
3
4
5
0
100
200
300
400
500
600
Small-strain material damping,Dmin (%)
Matric suction,(u
a
-u
w
) : kPa
(p-ua) = 50 kPa
(p-ua) = 100 kPa
(p-ua) = 200 kPa
(p-ua) = 400 kPa
(a) Logarithmic decay curve
RC/BE testing at matric suction states near the air-entry value of
the test soil.
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0
1
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Small-strain material damping,Dmin (%)
Matric suction,(u
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-u
w
) : kPa
(p-ua) = 50 kPa
(p-ua) = 100 kPa
(p-ua) = 200 kPa
(p-ua) = 400 kPa
(b) Half-powerbandwidth method
-6000
-4000
-2000
0
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-0.0002
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0
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Cyclic shear stress (MPa) x 10
-6
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