Numerical Investigation of Dynamic Centrifuge Tests on Disconnected Piled Raft Foundation

Kyuchan Ji; Heon-Joon Park

Publication Title
Numerical Investigation of Dynamic Centrifuge Tests on Disconnected Piled Raft Foundation

Abstract

To accurately evaluate the soilstructure interaction behavior of disconnected piled raft foundation (DPRF), both physical and numerical modelling are required due to the inherent uncertainty and complicated engineering characteristics of soil. Centrifuge model tests are widely recognized as an efficient experimental method for simulating real geotechnical phenomena, as it can replicate in-situ confined stress conditions more effectively than other methods such as 1g shaking table tests. However, dynamic centrifuge modelling also has inherent limitations as a form of physical modelling. To complement the results of dynamic centrifuge model test of DPRF, FEM-based numerical simulations using LS-DYNA were performed. The results from numerical analysis and centrifuge tests were compared in terms of natural frequency, peak ground acceleration (PGA), settlement, and bending moment. The findings suggest that, considering the strengths and limitations of each method, both dynamic centrifuge testing and numerical simulations should be used complementarily for the reliable evaluation of DPRF's dynamic behavior.

Authors
Kyuchan Ji; Heon-Joon Park

Published In

11th International Conference on Physical Modelling in Geotechnics (ICPMG2026)

Theme

Special Session 5: Combination of numerical and physical modelling