Abstract
Dynamic centrifuge tests are conducted using soil-pile-structure models in order to investigate the seismic behavior of a building with semi-rigid pile head connections in liquefiable soil. The dynamic test results show that: (1) The semi-rigid pile head connection is effective for reducing the bending moment of a pile in liquefied soil; (2) The natural period of the soil-pile-structure system with semi-rigid pile head connections becomes longer than that of the system with rigid pile head connections during liquefaction; and (3) The hysteresis damping induced by the dynamic interaction between liquefied soil and piles in the system with semi-rigid pile head connections is larger than that in the system with rigid pile head connections.
