Influence of rock-socketed characteristics on the vertical dynamic impedance of rock-socketed pile

PDF(1900 KB)

Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (7) : 51-57.

论文

Influence of rock-socketed characteristics on the vertical dynamic impedance of rock-socketed pile

WU Wen-bing1,2, JIANG Guo-sheng1, DOU Bin1, WANG Kui-hua2，HUANG GEN-sheng1

Author information +

History +

Abstract

Based on plane strain model and Reyleigh-Love rod model, the calculating model and governing equation of rock-socketed pile embedded in layered soil is established when there is arbitrary vertical exciting force acting on the pile head. Combined the boundary conditions and initial conditions, the analytical solution of vertical dynamic impedance at the head of rock-socketed pile is derived by means of Laplace transformation and impedance function transfer method. By means of parametric study method, the influence of rock-socketed characteristics on the vertical dynamic impedance of rock-socketed pile is investigated within the low frequency range. The results show that, for a certain depth of overlaying soil, the dynamic stiffness decreases as the rock-socketed length increases while the dynamic damping increases as the rock-socketed length increases. When the radius of rock-socketed segment is equal to pile radius, it can be seen that the dynamic stiffness and dynamic damping increase as pile radius increases. When the radius of rock-socketed segment is less than pile radius, it can be seen that the dynamic stiffness decreases as the radius of rock-socketed segment decreases, but the dynamic damping increases as the radius of rock-socketed segment decreases. It can also been shown that the dynamic stiffness increases and the dynamic damping decreases as the shear wave velocity of bedrock increases.

Key words

rock-socketed pile / vertical dynamic impedance / rock-socketed characteristic / lateral inertial effect / Laplace transformation

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

WU Wen-bing;JIANG Guo-sheng;DOU Bin;WANG Kui-hua;HUANG GEN-sheng. Influence of rock-socketed characteristics on the vertical dynamic impedance of rock-socketed pile[J]. Journal of Vibration and Shock, 2014, 33(7): 51-57