Testing and modelling of sand-steel interfaces under static and cycle loading

Abstract

The behavior of the interface between Ottawa sand and steel has been studied using a new device known as the Cyclic-Multi-Degree-of-Freedom device with pore pressure measurements (CYMDOF-P). The device can automatically load and test dry or saturated interfaces and has the capability of performing simple shear tests. A series of static and cyclic displacement-controlled interface tests are described. The variables were type of loading, normal stress, drainage conditions, and rate of loading. The results of the laboratory tests are used to determine the parameters for use in the disturbed state interface model to describe the interface shear stress-deformation response. Verification of the DSC model is performed with respect to the observed behavior and it is done with respect to laboratory tests that were used and one that was not used in the calibration process of the model. Generally, the model predictions were reasonable and satisfying.