Seismic resistance of reinforced concrete interior pile cap using precast pile

The pile cap is the very important member connected with column, footing beams and pile. As vertical members, these are two kinds of member, column and pile, in a pile cap. So, the seismic behavior of pile cap is much complicated than the beam column joint. The experiments on the reinforced concrete interior pile cap which were composed of one column, two footing beams and one pile were carried out under cyclic loadings. In this paper, the effects of the axial force of column and the volume of pile cap on the seismic behavior, e. g., the process of damages, failure mechanism and the ultimate strength of pile cap, are described.