Print Email Facebook Twitter Assessing the drivability of a monopile through the rock armour layer Title Assessing the drivability of a monopile through the rock armour layer: An analysis using Discrete Element Method and small-scale testing Author Bărbunţoiu, Teodora (TU Delft Civil Engineering & Geosciences) Contributor Gavin, Kenneth (mentor) Askarinejad, A. (graduation committee) Schott, D.L. (graduation committee) Mohajeri, M. (graduation committee) Thijssen, Rene (mentor) van Giffen, Ike (mentor) Degree granting institution Delft University of Technology Date 2021-11-22 Abstract Deployment of renewable energy is essential to reach a carbon neutral economy. Offshore wind farms have caught the interest of many developed countries since they are an essential source of green energy. The interest of this thesis lays in the design of the foundation used for offshore wind farms, in particular the interaction between the monopiles and the scour protection layer. An optimised one-stage installation process for the scour protection is investigated, which consists of first placing the rock armour and then driving the monopile through the entire scour protection layer. This is an efficient method to reduce the installation time and the operational cost.The purpose of this research is to identify the limitations which are related to the penetration of the monopile through the stone armour. The scour protection material is composed of large diameter rocks, which can hinder the penetration of the pile, or even damage the tip of the pile. A restricting ratio of the mean size of the rock (d50) to the thickness of the monopile wall (w) is explored, as well as an investigation of the effect of penetration resistance on different material and geometry characteristics. The first research method employed is a literature study, which proves that the analytical formulation of the axial capacity provided by the available standards is inappropriate for the application of this thesis. Thus, two other research methods are identified, which include designing an experimental small-scale test and a Discrete Element Model (DEM) of a penetration test. Subject scour protectionmonopileDiscrete Element Methodsmall-scale experimentscalibrationDesign of Experimentpenetration resistanceparticle shapevalidation and verificationrock armour To reference this document use: http://resolver.tudelft.nl/uuid:b85939ce-2d14-4107-8b09-dd2dcafc2e8b Embargo date 2023-11-22 Part of collection Student theses Document type master thesis Rights © 2021 Teodora Bărbunţoiu Files PDF Teodora_Barbuntoiu_MSc_Th ... _11_21.pdf 14.48 MB Close viewer /islandora/object/uuid:b85939ce-2d14-4107-8b09-dd2dcafc2e8b/datastream/OBJ/view