[Geotechnical Engineering]

Luan L, Ding X, Zheng C, et al. Dynamic response of pile groups subjected to horizontal loads[J]. Canadian Geotechnical Journal, 2019 https://doi.org/10.1139/cgj-2019-0031.

Key words: Pile groups; Dynamic analysis; Soil-structure interaction; Analytical methods

High Lights:

A pile-to-pile dynamic interaction factor is defined through frictional resistance around the active and passive piles.

The interaction factor is proposed to consider the influence of pile geometry.

The interaction factor is used to evaluate the dynamic responses of horizontally pile groups.

Abstract:

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 considering ground waves due to pile vibration that propagate along both the horizontal and vertical plane, 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 which 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.

Resource：https://www.nrcresearchpress.com/doi/abs/10.1139/cgj-2019-0031#.XfdWEsozY2w