Analytical solution to spatial axisymmetric problem of axially loaded hollow concrete filled steel tubular pile member

By means of the Love's displacement function derived from the spatial axisymmetric elasticity theory, the problem of thick-walled cylinder subjected to uniform pressures respectively at both ends, inner and outer walls is solved. According to the deformation compatibility and equilibrium conditions on the interface of steel tube and hollow concrete, the elasticity analytical solution of axial loaded hollow concrete filled steel tubular pile member is obtained. Using the analytical solution, the initial constraining pressure on steel and concrete interface is studied, and the stress distribution and plastic development trend of both hollow and solid concrete filled steel tubular piles are analyzed.