Collaborative Research: Dynamic Behavior of Slickensided Surfaces
Project funded by:
Award #0324499 (2004)
| PI: |
J. M. Duncan, Virginia Technical University |
| Co-PIs: |
C. L. Meehan, R. W. Boulanger(University of California Davis) , I Idriss |
| Description: |
Movement along pre-existing slickensided rupture surfaces in overconsolidated clay and clay
shale slopes can represent a critical sliding mechanism during earthquakes. The seismic
behavior of pre-existing slickensided surfaces in overconsolidated clay was examined by
performing dynamic centrifuge model tests of two slickensided sliding block models. Dynamic
shear displacements were concentrated along the pre-formed slickensided surfaces. The peak
shear resistances mobilized along the slickensided surfaces during dynamic loading were 90-
120% higher than the drained residual strength measured prior to shaking.
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