抄録
In order to evaluate bearing capacity and pull-out resistance of piles under alternately cyclic vertical loading, monotonic and cyclic loading tests were conducted on a pile with or without a wing plate under a centrifugal acceleration of 30 G. In the pulling-out process, cyclic loading decreases the shaft friction and the force acting on a wing plate. The decrease is more significant in the shaft friction than in the wing force. In contrast, in the pushing process, cyclic loading decreases the shaft friction but increases the wing force and the end resistance.
