Some dynamic characteristics such as shear modulus

damping

strength

pore water pressure and liquefaction are studies by dynamic triaxial tests on saturated compacted loess under different consolidation stress conditions. It is indicated that from test results

the relation between dynamic stress and strain can be fitted with hyperbola

power correlations between its two parameters containing the maximum dynamic shear modulus and the maximum dynamic shear stress and consolidation axial stress are obtained and normalized under different consolidation stress conditions. Damping ratio is almost independent of consolidation confining stress and consolidation ratio. Dynamic shear stress ratio increases with the increase of consolidation ratio

it decreases with the increase of consolidation confining stress. Relation between dynamic pore water pressure ratio and cyclic number ratio is dependent on consolidation confining pressure and consolidation ratio as well as dynamic stress. Relation between ratio of dynamic pore water pressure and cyclic number ratio at vibrating process and failure is only dependent on consolidation confining stress

which is independent on consolidation confining stress and dynamic stress

and can be fitted by power function. The saturated compacted loess can produce liquefaction when failure cyclic number is larger than 30 under isotropic consolidation stress condition and can not produce liquefaction under anisotropic consolidation stress condition.