Development of a coupled pile-to-pile interaction model for the dynamic analysis of pile groups subjected to vertical loads

摘要

This paper presents a new analytical model for calculating the dynamic performance of pile groups subjected to vertical loads. The derived solution allows considering the robust pile-to-pile coupled interaction on impedance of the pile group, by accounting for the secondary waves generated by the vibration of the receiver pile. For that, we introduce a dynamic coupling factor to modify the classical pile-to-pile interaction factor to illustrating the coupling effect of the source and receiver pile. Numerical results obtained for typical problem parameters indicate that this coupling effect can be important for closely spaced pile group, pile groups with large slenderness ratio or pile groups with large group members. The proposed solution is capable of determining the frequency-dependent impedance of large pile groups comprising arbitrary numbers of piles, which numerical modelling can be cumbersome.