scholarly journals Simplified computational methods for estimating dynamic impedance of batter pile groups in homogeneous soil

2021 ◽  
Vol 50 (14) ◽  
pp. 3894-3915
Author(s):  
Miran Cemalovic ◽  
Jan B. Husebø ◽  
Amir M. Kaynia
Keyword(s):  
Computational Methods ◽  
Pile Groups ◽  
Dynamic Impedance ◽  
Homogeneous Soil

Dynamic response of pile groups subjected to horizontal loads

2020 ◽  
Vol 57 (4) ◽  
pp. 469-481 ◽  
Author(s):  
Lubao Luan ◽  
Xuanming Ding ◽  
Changjie Zheng ◽  
George Kouretzis ◽  
Qi Wu
Keyword(s):  
Numerical Methods ◽  
Soil Reaction ◽  
Pile Groups ◽  
Dynamic Impedance ◽  
Interaction Factor ◽  
Cylindrical Piles ◽  
Pile Interaction ◽  
Efficient Alternative ◽  
Displacement Based ◽  
Surrounding Soil

This paper presents an analytical method for calculating the dynamic impedance of pile groups comprising an arbitrary number of cylindrical piles connected with a rigid cap. The solution allows consideration of ground waves due to pile vibration that propagate along both the horizontal and vertical planes, as well as the effect of the actual pile section geometry on the reaction from the surrounding soil. For that, we introduce a dynamic pile–soil–pile interaction factor that is defined on the basis of soil reaction developing on receiver piles, instead of the classical displacement-based interaction factor used in past studies. Despite the fact that the solution is applicable to problems where low-to-moderate soil strains are expected to develop, it poses as an attractive, efficient alternative to numerical methods for the analysis of very large pile groups.

Vertical Vibration of Pile Groups in Soil Described by Fractional Derivative Viscoelastic Model

2011 ◽  
Vol 189-193 ◽  
pp. 3492-3497
Author(s):  
Jiu Min Sun ◽  
Lin Chao Liu ◽  
Qi Fang Yan
Keyword(s):  
Fractional Derivative ◽  
Soil Layer ◽  
Viscoelastic Model ◽  
Dynamic Interaction ◽  
Vertical Vibration ◽  
Pile Groups ◽  
Pile Spacing ◽  
Dynamic Impedance ◽  
Stiffness And Damping ◽  
Relationship Of

The stress-strain relationship of soil is described by fractional derivative viscoelastic model, and established the vertical governing equations of viscoelastic soil. The stiffness and damping of the soil layer described by fractional viscoelastic model are obtained based on the method of layer. The pile-soil dynamic interaction is modeled by Winkler dynamic elastic-damping model, the pile to pile dynamic interaction and vertical vibration of the pile groups in the soil described by fractional derivative viscoelastic model is solved. The influence of the pile spacing, order of fractional derivative and model parameter of soil on the vertical dynamic impedance of pile groups is also investigated. The result indicated that the curves of the dynamic impedance varying with frequency were more complex with the increase of pile spacing, the influence of the order of fractional derivative on vertical dynamic impedance of pile groups is different at lower frequency and high frequency, and the selection of the constitutive model of viscoelastic soil had great effect on the vertical dynamic impedance of pile groups.

Sign in / Sign up

Export Citation Format

Share Document