It was shown that the cumulative plastic strain depended not only on the applied cyclic stress and number of cycles,but also on the initial static deviatoric stress level.

Research on accumulative deformation behavior of soft clay under cyclic loads;

Compared with other kinds of sensors,module matching FBG has a better test effect,and this kind of FBG is able to reflect the accumulative deformation of asphalt mixture to some extent.

An advanced model of ballast accumulated deformation and the effect of load order on accumulated deformation;

Based on laboratory test, test device is developed to test accumulated deformation of the functional layer mixture.

Equivalent viscoplastic model for cumulative deformation of sandy silt under long-term cyclic loading

Test result shows that(1)the increment rate of plastic strain is lager with the higher dynamic stress level,the smaller density and the lower confining pressure;(2) the increment ratio of plastic strain reduces gradually with the increment of load cycles;(3)the relationship between cumulative deformation and load cycles accords with power law.

Test result shows that the cumulative deformation of compacted silt is closely related with its dynamic stress and water content.