A discrete crack approach to normal/shear cracking of concrete

This paper presents a numerical procedure for fracture of brickwork masonry based on the strong discontinuity approach. The model is an extension of the cohesive model prepared by the authors for concrete, and takes into account the anisotropy of the material. A simple central-force model is used for the stress versus crack opening curve. The additional degrees of freedom defining the crack opening are determined at the crack level, thus avoiding the need of performing a static condensation at the element level. The need for a tracking algorithm is avoided by using a consistent procedure for the selection of the separated nodes. Such a model is then implemented into a commercial code by means of a user subroutine, consequently being contrasted with experimental results. Fracture properties of masonry are independently measured for two directions on the composed masonry, and then input in the numerical model. This numerical procedure accurately predicts the experimental mixed-mode fracture records for different orientations of the brick layers on masonry panels.

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“…8). This test configuration has been successful for mixed-mode fracture of concrete and mortar [62,63].…”

Section: Materials and Specimensmentioning

confidence: 99%

An embedded cohesive crack model for finite element analysis of brickwork masonry fracture

Reyes

Gálvez

Casati

et al. 2009

Engineering Fracture Mechanics

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“…Concerning computational modeling of cracking in cementitious materials, different approaches are available, including discrete crack models [25,26], lattice models [27,28] and damage models [29,30]. Comprehensive summaries on this topic can be found in [31,32].…”

Section: Introductionmentioning

confidence: 99%

Towards multiscale modeling of the interaction between transport and fracture in concrete

2016

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Transport, fracture and their interaction in concrete are complex phenomena of great practical relevance for the durability of civil engineering structures. Due to the heterogeneous nature of the materials, encompassing a wide range of length scales, multiscale approaches are essential. In this paper, we outline some recent research results and open issues in this field. First, we present a microscale model which aims at simulating chloride diffusion and binding in cement. Then, we outline a mesoscale model addressing coupling between cracking and diffusion. Finally, we discuss open issues in the acquisition of the mesoscale geometry from X-ray computed tomography techniques.

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“…The cohesive crack model, developed by Hillerborg and co-authors [1] for mode I fracture of concrete, was shown to be efficient to model the fracture process of quasi-brittle materials. It has been extended to mixed mode fracture (modes I and II) and incorporated into finite element programs [23][24][25][26][27][28] and into boundary element codes [29]. One of the difficulties associated with these programs is that they require the remeshing and/or refinement of the finite element mesh when the crack grows, and some of them also require an input of material properties that are difficult to evaluate.…”

Section: Introductionmentioning

confidence: 99%

An embedded cohesive crack model for finite element analysis of quasi-brittle materials

Gálvez

Planãs

Sancho

et al. 2013

Engineering Fracture Mechanics

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This paper presents a numerical implementation of the cohesive crack model for the anal-ysis of quasibrittle materials based on the strong discontinuity approach in the framework of the finite element method. A simple central force model is used for the stress versus crack opening curve. The additional degrees of freedom defining the crack opening are determined at the crack level, thus avoiding the need for performing a static condensation at the element level. The need for a tracking algorithm is avoided by using a consistent procedure for the selection of the separated nodes. Such a model is then implemented into a commercial program by means of a user subroutine, consequently being contrasted with the experimental results. The model takes into account the anisotropy of the material. Numerical simulations of well-known experiments are presented to show the ability of the proposed model to simulate the fracture of quasibrittle materials such as mortar, con-crete and masonry.

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A discrete crack approach to normal/shear cracking of concrete

Cited by 127 publications

References 19 publications

An embedded cohesive crack model for finite element analysis of brickwork masonry fracture

An embedded cohesive crack model for finite element analysis of brickwork masonry fracture

Towards multiscale modeling of the interaction between transport and fracture in concrete

An embedded cohesive crack model for finite element analysis of quasi-brittle materials

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