Abstract
It is well known that seismic response of a viaduct with batter piles tends to show the out-of-phase rocking motion unlike the case of that with normal piles. In this research, we studied out-of-phase rocking motion in consideration of dynamic soil-pile interaction and effect of reduction of inertia force triggered by out-of-phase rocking motion. We analyzed the kinematic interaction of a viaduct with batter piles with a numerical method. Next, we focused on the effective motion of batter piles and considered the effect of reduction of inertia force. The analytical results showed that the appropriate simple model which considered rotation component of effective motion could express the seismic response of the viaduct with batter piles. Finally, we proposed the static method for a seismic response analysis of the viaduct with batter piles, and confirmed the applicability of the proposed method.
