Modelling of concrete fracture at aggregate level using FEM and DEM based on X-ray μCT images of internal structure

被引：168

作者：

Skarzynski, L. ^{[1
]}

Nitka, M. ^{[1
]}

Tejchman, J. ^{[1
]}

机构：

[1] Gdansk Univ Technol, Fac Civil & Environm Engn, Gdansk, Poland

来源：

ENGINEERING FRACTURE MECHANICS | 2015年 / 147卷

关键词：

Concrete; Discrete element method; Fracture; Interfacial transitional zones (ITZs); Meso-scale finite element method (FEM); Non-local theory; X-ray computed tomography; NONLOCAL DAMAGE MODEL; BONDED-PARTICLE MODEL; LATTICE MODEL; BEAMS; SIMULATIONS; MESOSCALE; BEHAVIOR; TENSION; ZONES; COMPRESSION;

D O I：

10.1016/j.engfracmech.2015.08.010

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The paper describes two-dimensional meso-scale numerical results of fracture in notched concrete beams under quasi-static three-point bending. Concrete was modelled as a random heterogeneous 4-phase material composed of aggregate, cement matrix, interfacial transitional zones (ITZs) and air voids. Two different approaches were used: a continuum and discrete one. The concrete micro-structure in calculations was directly taken from real concrete specimens based on 3D X-ray micro-computed tomography images and 2D images by the scanning electron microscope. Attention was paid to the shape of a fracture zone between aggregate grains. In addition, the property effect of ITZs on fracture was studied. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：13 / 35

页数：23

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