Automatization of testing on soil dynamic deformation characteristics

In order to improve the performance of the DTC-158 resonance column test apparatus, a microcomputer equipped with the Vib'SYS data collection system was connected to the apparatus. The automatization of collection, recording, calculation and handling of the testing data was realized. The basic principle of resonance column test and the characteristics of the improved instrument were described briefly. The test on soil dynamic deformation characteristics, including the properties of dynamic shear modulus ratio and damping ratio fluctuated with the dynamic shear strain, of an actual project was performed on the DTC-158 resonance column test apparatus. It showed that the properties of controlling and measuring were improved by an order of magnitude, the automatization level and test precision and working efficiency of soil dynamic deformation characteristics test were raised greatly.-