Abstract: The proportional model test of seismic response of bridge of pile foundation in liquefaction ground is done by a large-scale shaking table, which can commendably recurrence the main phenomenon of ground liquefaction and structure breakage arisen from natural earthquake. In input of 0.15gEl Centro wave, the upside of the saturation sand stratum is partly liquefied; the low-frequency response of acceleration appears on pile and pillar frusta; and the peak value of pile dynamical strain fastly aggrandizes from bottom to top; and moreover, largely minishes up to toft surface. In input of 0.5gEl Centro wave, the saturation sand stratum is entirely liquefied; the low-frequency response of acceleration also appears on pile and pile is broken; and the peak value of pile dynamical strain fastly aggrandizes from bottom to top, and moreover, largely minishes up to toft surface. It has importantly influence upon dynamic response of pile and pillar frusta that the saturation sand stratum is liquefied or not.

Key words: liquefaction ground, bridge of pile foundation, response of seismic destroy, large-scale shaking table model test