The Parameters Research on Considering the Influence of Dynamic Torsion Impedance of the Radial Inhomogeneous Viscoelastic Soil
Based on the recursion method of shearing ragidity of soil layer, dynamic torsional impedance of the radial inhomogeneous viscoelastic soil is studied.Under the certain fundamental assumption,combined with displacement basic solution of the plane axial symmetry strain question,the displacement the continuous and boundary of the soil layers, the formula of dynamic torsional impedance of the pile-soil contact surface is deduced.Degenerated into homogeneous viscoelastic model,the model is further confirmed accurate.Finally, the conclusion is obtained:(1) The bigger is G2/G1,the larger the soil body actual stiffness is. The dynamic damping presents the trend of increase;(2)In the area of the radial disturbance soil,as ‘d’increases, the soil body actual stiffness is increasing. When G2/G1 is smaller than 1,the dynamic damping is reducing along with increases of ‘d’,when G2/G1 is bigger than 1,the dynamic damping is increasing along with increases of ‘d’.(3)Actual stiffness and dynamic damping assumes the linear variation along with increasing of material damping.
Paul P. Lin and Chunliang Zhang
J. M. Wu et al., "The Parameters Research on Considering the Influence of Dynamic Torsion Impedance of the Radial Inhomogeneous Viscoelastic Soil", Applied Mechanics and Materials, Vols. 105-107, pp. 1400-1405, 2012