Linear and nonlinear soil-pile-structure interaction under static and transient impact loading.

摘要

Main objective of this dissertation is to formulate the linear/nonlinear soil-pile-structure interaction problem by using the most cost effective and accurate methods. For these purposes, finite element method and boundary element method were combined in one analysis program. This dissertation includes the unification of past contributions of several researchers in the field of linear/nonlinear static and dynamic analyses and generalization of these developments into a practical nonlinear analysis method for such structures.; Half space soil is modeled as a multilayered continuum in a hybrid boundary element formulation. The superstructure and pile/piles are modeled as beam column elements. The nonlinear behavior is accommodated by using nonlinear hysteretic p-y springs on the pile-soil interaction surface in which the modified Özdemir's model is implemented.; In order to verify the proposed theory, a number of published model and full scale experimental results are compared for static and dynamic loads in axial and lateral directions.; For the first time a rational mechanics based approximate nonlinear time domain formulation for homogeneous and Gibson soils are developed and the accuracy for the linear response is compared with more mathematically exact Laplace transform domain solutions and for further investigation the result of a full scale statnamic load tests (performed by Rollins et al., 1996) are compared.