The Effect of Negative Temperatures of Frozen Clay on Dynamic Strain Amplitude

Abstract

Authors studied variation characteristics of dynamic strain amplitude of frozen clay with different temperatures by MTS-810 vibration tri-axial material testing machine. Results show that the variability is carried by instrument errors, operation errors, and so on. The average values are used to eliminate the variability of test results. With the increasing of the load levels, dynamic strain amplitude increases gradually. Negative temperature has a lager influence on the variation characteristics of dynamic strain amplitude, however, the influence is smaller when temperature above freeze points of water in the soil; when the temperature below it, dynamic strain amplitude changes with decreasing temperature; when temperature below-4°C, dynamic strain amplitude has no change with decreasing temperature. Dynamic strain amplitude grows with increasing dynamic stress amplitude.