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Meso-scale modelling of compressive fracture in concrete with irregularly shaped aggregates

Naderi, S; Tu, W; Zhang, M; (2020) Meso-scale modelling of compressive fracture in concrete with irregularly shaped aggregates. Cement and Concrete Research 10.1016/j.cemconres.2020.106317. (In press).

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Abstract

This paper presents a meso-scale modelling framework to investigate the fracture process in concrete subjected to uniaxial and biaxial compression accounting for its mesostructural characteristics. 3D mesostructure of concrete consisting of coarse aggregates, mortar and interfacial transition zone between them was developed using an in-house code based on the Voronoi tessellation and splining method, which enables to generate the realistic-look aggregates with controllable structural features such as content, location, size and shape. Based on the generated 3D mesostructure, the concrete damage plasticity approach was employed to simulate the compressive fracture behaviour of concrete in terms of crack morphology and stress-strain response against the shape parameters of aggregate. Results indicate that the shape of aggregate has a negligible effect on compressive strength of concrete, which is highly associated with the random location and size distribution of aggregate. The aggregate irregularity has a significant influence on crack initiation and growth of concrete.

Type: Article
Title: Meso-scale modelling of compressive fracture in concrete with irregularly shaped aggregates
DOI: 10.1016/j.cemconres.2020.106317
Publisher version: https://doi.org/10.1016/j.cemconres.2020.106317
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Mesostructure, Irregular shape aggregate, Crack propagation, Damage evolution, Finite element analysis
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10115417
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