Computational technology for analysis of 3D meso-structure effects on damage and failure of concrete

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Computational technology for analysis of 3D meso-structure effects on damage and failure of concrete

Wang, X; Zhang, M; Jivkov, AP; (2016) Computational technology for analysis of 3D meso-structure effects on damage and failure of concrete. International Journal of Solids and Structures , 80 pp. 310-333. 10.1016/j.ijsolstr.2015.11.018. Green open access

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Abstract

Methodology for analysis of meso-structure effects on longer-scale mechanical response of concrete is developed. Efficient algorithms for particle generation and packing are proposed to represent 3D meso-structures as collections of discrete features distributed randomly in a continuous phase. Specialised to concrete, the continuous phase represents mortar, while the features are aggregates and voids. Intra- and inter-phase cohesive zones are used for failure initiation and crack propagation. A Monte Carlo approach is proposed to analyse the effects of meso-structure geometrical (volume density, size distribution and shape of features) and physical (strength and energy of cohesive zones) properties, whereas a number of model realisations with identical properties are used for statistical analysis. The results present the relative significance of each meso-structure parameter for the emergent load capacity (tensile strength), damage evolution via micro-crack coalescence and macro-crack patterns, and failure energy density (toughness) of concrete. The proposed methodology is an effective tool for meso-structure optimisation in the design of concrete structures with prescribed requirements for strength and toughness.

Type:	Article
Title:	Computational technology for analysis of 3D meso-structure effects on damage and failure of concrete
Open access status:	An open access version is available from UCL Discovery
DOI:	10.1016/j.ijsolstr.2015.11.018
Publisher version:	http://dx.doi.org/10.1016/j.ijsolstr.2015.11.018
Language:	English
Additional information:	© 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Keywords:	Concrete, Particle packing, Voids, Meso-scale model, Cohesive zones, Monte Carlo simulation
UCL classification:	UCL 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 Civil, Environ and Geomatic Eng
URI:	https://discovery.ucl.ac.uk/id/eprint/1474656