A STUDY ON SEISMIC RESPONSE OF PILE FOUNDATION AND THE HYBRID STRUCTURAL FOOTING OF DOUBLE RACEKT-TYPE STEEL PIERS

Abstract

 In this paper, seismic responses of RC piles and the hybrid structural footing foundation of the double racket-type steel piers are described by 2-D static and dynamic soil-structure coupled nonlinear FEM analyses in detail. Authors verified that the newly developed structure had enough load bearing capacity when the level II earthquake load was applied in the longitudinal and transverse directions. It is founded that shear deformation around the heads of the existing RC piles is not significant and the hybrid structural footing is also effective to reduce the stresses in the lower surface of the existing RC footing. It is confirmed the overall pile and footing foundations could keep stable even if some parts of the RC piles yielded under the level II earthquake.