3D analysis of fracture processes in concrete

Doctoral thesis (2007)

Authors

G Lilliu Materials and Environment - CEG
Research Group
Materials and Environment (CEG) (TU Delft)
Copyright: © 2007 G Lilliu
More Info
expand_more

Published Date

2007

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Materials and Environment

Abstract

Concrete fracture is governed by randomly distributed aggregate particles, which make cracks fundamentally not planar. This phenomenon can be captured only by 3D models. Within the 3D framework, material heterogeneity and displacement dis continuity must be incorporated Lattice models allow to consider all these aspects adequately. In this thesis a lattice model is used to analyze the influence of the material structure on the global & structural response and to compare results from 2D and 3D modelling Concrete is schematized as a network of beams with different mechanical properties corresponding to three phases: aggregate, hi matrix, and interfacial transition zone Fracture is mimicked by sequential removal of elements where the stress exceeds the tensile strength Though a purely brittle linear elastic behaviour is assumed for each element, structural softening is modelled successfully.