TY - GEN
T1 - Dynamic shear response of a geomembrane/geosynthetic clay liner interface
AU - Ross, Jason D.
AU - Fox, Patrick J.
AU - Olsta, James T.
PY - 2011
Y1 - 2011
N2 - A series of large-scale dynamic direct shear tests were performed to measure the interface shear strength between a textured geomembrane (GMX) and a needle-punched geosynthetic clay liner (NP GCL) under cyclic loading. The study was conducted for large ranges of shearing normal stress (σn,s= 13 to 2071 kPa) and cyclic displacement amplitude (Δa = 2 to 30 mm). The experimental data indicate that the failure mode of a GMX/NP GCL specimen depends on both σn,s and Δa. All tests conducted at low to moderate normal stress levels (σn,s ≤ 692 kPa) produced interface failures. Partial to complete internal failures were observed for some tests at low Δa and high σn,s. Interface failures still occurred for the largest displacement amplitude (Δa = 30 mm) at all normal stress levels. In general, the testing program has indicated a more complex interrelationship among failure mode, normal stress level and shear displacement rate than has been previously considered for these materials.
AB - A series of large-scale dynamic direct shear tests were performed to measure the interface shear strength between a textured geomembrane (GMX) and a needle-punched geosynthetic clay liner (NP GCL) under cyclic loading. The study was conducted for large ranges of shearing normal stress (σn,s= 13 to 2071 kPa) and cyclic displacement amplitude (Δa = 2 to 30 mm). The experimental data indicate that the failure mode of a GMX/NP GCL specimen depends on both σn,s and Δa. All tests conducted at low to moderate normal stress levels (σn,s ≤ 692 kPa) produced interface failures. Partial to complete internal failures were observed for some tests at low Δa and high σn,s. Interface failures still occurred for the largest displacement amplitude (Δa = 30 mm) at all normal stress levels. In general, the testing program has indicated a more complex interrelationship among failure mode, normal stress level and shear displacement rate than has been previously considered for these materials.
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U2 - 10.1061/41165(397)205
DO - 10.1061/41165(397)205
M3 - Conference contribution
AN - SCOPUS:79956348130
SN - 9780784411650
T3 - Geotechnical Special Publication
SP - 2010
EP - 2020
BT - Geo-Frontiers 2011
T2 - Geo-Frontiers 2011: Advances in Geotechnical Engineering
Y2 - 13 March 2011 through 16 March 2011
ER -