ABSTRACT
The study investigates the performance of the Disconnected Piled Raft Foundation (DPRF) under seismic loading conditions. Two superstructures with different fixed base periods: a short period structure (0.5s), which represents a five-storey building, and a long period structure (2s), which represents a twenty-storey building are considered. The response of the DPRF is then compared with conventional pile raft foundations to understand the effectiveness of the DPRF in mitigating the seismic effects. The result suggests that beneficial or detrimental response of DPRF depends on both time period of the superstructure supported and the applied input motion. In DPRF, piles experience lesser bending moment and axial forces, however, the raft and superstruc-ture accelerations and the displacements are controlled by the period of superstructure.
