Behaviour of model piles subjected to cyclic axial loading

We present in this paper the results of cyclic loading tests carried out on instrumented model piles in a calibration chamber. Both load-controlled tests, allowing to study the accumulation of displacements during the cycles and the stability of the inclusion (cyclic stability diagram), and displacement-controlled test, allowing to study the evolution of tip resistance and friction characteristics during the cycles, have been carried out. In particular, it is shown that cyclic loading has a very negative influence on loading capacity of the inclusion, in terms of tip resistance and friction in the case of jacked and buried piles.