Dynamics of a Cylindrical Pile in a Transversely Isotropic Half-Space under Axial Excitations

AbstractFor the first time, a theoretical formulation is presented for the load-transfer analysis of an elastic cylindrical thin-walled pile immersed in a transversely isotropic half-space under axisymmetric excitations. By generating a set of weakly singular Green’s functions for the embedding medium and using a shell theory for the pile, it is shown that similar to the related interaction analysis in isotropic medium, the soil-structure interaction problem under consideration is reducible to two coupled Fredholm integral equations. Regarding the singular nature of stress transfer, a newly developed adaptive-gradient elements family is employed in the development of an accurate numerical scheme. The effect of soil material anisotropy on the dynamic interaction process is explored by presenting a set of numerical results for various material and geometrical conditions and various excitation frequencies. To confirm the accuracy of the proposed analytical and numerical scheme, numerical results are compared...