Kumlarda koni penetrasyon testine göre yeni bir P-Y formülasyonu

The behavior of soils surrounding piles induced by lateral loading remains a significant research topic addressed under the soil-pile interaction problem. As laterally loaded piles have been crucial in onshore constructions for many decades, their use and enhancement have recently become essential in nearshore and offshore structures. This dissertation is dedicated to proposing new p-y formulations for piles in the sand through direct cone tip resistance (qc) measurements from cone penetration test (CPT), considering loading modes, for finite element (FE) modeling purposes. To achieve this objective, a parametric study has been planned, involving a series of 3D finite element analyses on a single pile model placed within soil models representing a natural sand (Sile sand). The analysis program encompasses two loading modes: the "acting force at the pile head" and the "translation of whole pile body". Knowing that the deformation mechanism of CPT is analogous to spherical cavity expansion (SCE) theory, qc profiles of the soil models used in the parametric study are determined through 2D axisymmetric FE model analyses in Plaxis 2D employing SCE in sand samples representing each 1-m-thick layer with varying stress conditions, and densities. Results have been processed by Genetic Algorithm (GA) code to derive p-y formulations for different cases. Finally, three separate field tests on piles loaded at the pile head and three FE models, which are representative of anchor piles where another type of loading mode is concerned, are modeled in a structural FE analysis program using different p-y formulations, including the ones derived by this study. It is observed that the models created using the proposed formulations exhibit good agreement with the relevant source data.