In order to investigate the influence of multi-factor coupling effects on frozen Lanzhou loess dynamic parameters

Lanzhou loess distributed in seasonal frozen soil region of western China was investigated experimentally. The dynamic parameters of frozen Lanzhou loess under different conditions were examined by dynamic triaxial test

including confining pressure (0.1

0.2

0.3 MPa)

soil temperature (−1

−3

−5 ℃)

soil water content (14%

16%

18%) and vibration frequency (1

2

4 Hz). Based on the test results

the changing rules of the maximum dynamic elastic modulus

equivalent viscous damping coefficient and reference strain amplitude of frozen Lanzhou loess under the coupling influence factors of temperature

confining pressure

water content and loading frequency were analyzed. Test results show that the coupling factors including temperature

water content

loading frequency and confining pressure have different influences on the dynamic elastic modulus

reference strain amplitude and equivalent viscous damping coefficient of frozen Lanzhou loess. It can be found that the dynamic elastic modulus and reference strain amplitude of frozen Lanzhou loess are influenced most significantly by soil temperature

and the equivalent viscous damping coefficient is the most sensitive to the loading frequency. Moreover

based on the experimental results

the four factors affecting the frozen Lanzhou loess are normalized and dimensionlessized

and the prediction formulas of the dynamic parameters of the frozen Lanzhou loess are proposed using multiple regression analysis method. This will be beneficial to quickly predict the changing characteristics of the dynamic parameters of the frozen Lanzhou loess under the influence of the coupling effect of multiple factors. The formulas are helpful for rapid prediction of dynamic parameters of frozen Lanzhou loess under the multi-factor coupling influence effects.