Abstract
A study on lateral resistance of pile foundation becomes an important issue in seismic design. In order to obtain effect of relative density Dr pile diameter D and flexural rigidity EI on lateral resistance behaviour of single pile in sandy ground, a series of model single pile loading tests in geotechnical centrifuge was carried out. In the model test, relative density Dr, centrifuge acceleration ratio n and model pile diameter D were selected as test parameters. Before the centrifuge model test, physical properties (M-ψ relations) of six model piles were investigated by bending tests of the model piles.