Abstract:

In order to obtain distribution of bending moment along PCC pile under lateral load, full-scale model tests were carried out using large test tank developed by Hohai University. The three-dimensional elastoplastic finite element method was used to study the behavior of PCC pile and homalographic solid circular pile as well as PCC pile composite foundation and homalographic solid circular pile composite foundation under lateral load. The effects of different design parameters of PCC pile composite foundation on distribution of bending moment and deflection along pile were obtained. The study results show that the internal forces and deflection along pile decrease with the increment of vertical load, thickness of cushion, depth of foundation, and replacement ratio. It is concluded that the internal forces of pile can be reduced to ensure the safety of the pile by the appropriate adjustment of the main design parameters in the design of PCC pile composite foundation.

Key words: cast-in-situ concrete thick-wall pipe composite foundation, lateral load, full-scale test, three-dimensional elastoplastic finite elements, bending moment, deflection