Regularised crack behaviour effects on continuum modelling of quasi-brittle materials under cyclic loading

Vassaux, Maxime; Richard, Benjamin; Ragueneau, Frédéric; Millard, Alain

doi:10.1016/j.engfracmech.2015.09.040

Cited by 21 publications

(12 citation statements)

References 39 publications

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“…The mechanical parameters adopted for concrete, belonging to the class C40, are collected in Table 6. They have been chosen in accordance to (Rospars and Chauvel, 2014;Vassaux et al, 2015) and, in absence of data availability, calibrated in order to optimize the fitting between numerical and experimental results. [MPa] ν…”

Section: Rc Wall Under Cyclic Shearmentioning

confidence: 99%

Cracking of quasi-brittle structures under monotonic and cyclic loadings: A d/d damage model with stiffness recovery in shear

Cervera

Tesei

Ventura

2018

International Journal of Solids and Structures

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In the present paper, a new d + /d − damage model apt for quasi-brittle materials is described and its validation is carried out considering unreinforced concrete, reinforced concrete and masonry elements.Two independent scalar damage variables, d + and d − , in combination with the split of the reversible strain tensor into its positive and negative counterparts, are adopted in order to simulate the pronounced dissimilar response under tension and compression, typical of these materials. An energy-equivalence framework is considered for representing the orthotropy induced in the material by the degradation process, with the consequence that a thermodynamically consistent constitutive operator, positive definite, symmetric and strain-driven, is derived. In addition to the degradation parameters, the permanent strain tensor is also contemplated by the model and a modification of the exponential softening modulus is proposed in order to treat the evolution of the two causes of dissipation, damage and irreversible deformations, in a coupled way. effects is fundamental in order to match the observed structural response in terms of maximum resistance, evolution of stiffness degradation and dissipation capacity.

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Section: Rc Wall Under Cyclic Shearmentioning

confidence: 99%

Cracking of quasi-brittle structures under monotonic and cyclic loadings: A d/d damage model with stiffness recovery in shear

Cervera

Tesei

Ventura

2018

International Journal of Solids and Structures

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“…Recent investigations have made an attempt to better understand the mechanisms governing the damage evolution and durability of fiber-reinforced cementitious composites under cyclic loading (see, e.g., [3], [4]). In regards to computational analysis, a number of numerical models have been proposed to describe the behavior of plain and fiber-reinforced concrete under cyclic loading (e.g., [1], [5], [6]). This contribution presents an extension of a numerical model for structures made of plain and fiber reinforced concrete, previously proposed by the authors [7], which accounts for the formation of hysteresis loops during loading/unloading of concrete specimens due to internal frictional sliding mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of plain and fiber reinforced concrete structures during cyclic loading: Influence of frictional sliding and crack roughness

Gudžulić

Neu

Meschke

2021

Proc Appl Math and Mech

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Concrete is a quasi-brittle material, characterized by a non-negligible, finite-sized fracture process zone (FPZ) in which various toughening mechanisms play a significant role on crack development and propagation. Concrete is often reinforced with fibers to improve the serviceability and longevity of concrete structures by controlling the maximal crack widths and providing residual carrying capacity to initiated cracks. In quasi-brittle materials such as concrete, toughening mechanisms such as crack deflection due to the presence of large heterogeneities, contact shielding, i.e., wedging and crack closure induced by debris and rough crack faces, crack bridging by tough aggregates, unbroken ligaments and fibers (in fiber-reinforced concretes), are mostly governing damage evolution under monotonic and especially under cyclic loadings [1]. All these items contribute to a complex non-linear response in terms of load-displacement curves observed in experimental investigations. Many investigations have been performed on plain concrete, but not so many for high-performance fiber-reinforced concrete [2] which is the main subject of investigation within the DFG Priority Program 2020. In order to better understand the influence of these toughening mechanisms on the formation of hysteresis during cyclic loading-unloading of plain and steel fiber-reinforced high-performance concrete, we model these mechanisms and their evolving influence on damage development using a discrete crack approach, and take into account the imperfect closure of cracks and friction between crack faces that come in contact during loading/unloading of the specimen. Within the scope of this contribution, we present the formulation of the model and illustrate its performance through selected numerical experiments under monotonic and cyclic loading of plain and fiber-reinforced high-performance concrete specimens. Model predictions are compared with laboratory measurements.

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“…The lack of exhaustive experimental data hinders rapid and trustworthy progress. One major difficulty in performing experiments on such joints is the expected complexity of their behavior, with localized damage in the form of cracks and their closure [11,12]. Moreover, the joint is intrinsically a 3D structure that cannot be easily simplified using beam theory.…”

Section: Introductionmentioning

confidence: 99%

“…One major difficulty in performing experiments on such joints is the expected complexity of their behavior, with localized damage in the form of cracks and their closure. 11,12 Moreover, the joint is intrinsically a three-dimensional (3D) structure that cannot be easily simplified using beam theory. Resorting to simpler mechanical tests according to sub-structuring assumptions 13–16 may be limited in terms of representativity.…”

Section: Introductionmentioning

confidence: 99%

Toward virtual design and optimization of a structural test monitored by a multi-view system

Vitse

Poncelet

Iskef

et al. 2020

The Journal of Strain Analysis for Engineering Design

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In order to characterize the mechanical behavior of a reinforced concrete beam–column joint, an experiment is designed whereby different histories of increasing cyclic loads are applied, and the structure deformation (as well as the morphology of apparent surface cracks) is studied using multi-view correlation. The complex three-dimensional geometry and the slender nature of the beam and column call for numerous digital cameras were positioned around the specimen. Assessing the feasibility of image acquisition and estimating a priori uncertainties on multi-view correlation became a true challenge. It is shown that the recourse to photo-realistic rendering software provides the needed tools to perform this experiment design optimization.

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Regularised crack behaviour effects on continuum modelling of quasi-brittle materials under cyclic loading

Cited by 21 publications

References 39 publications

Cracking of quasi-brittle structures under monotonic and cyclic loadings: A d/d damage model with stiffness recovery in shear

Cracking of quasi-brittle structures under monotonic and cyclic loadings: A d/d damage model with stiffness recovery in shear

Numerical analysis of plain and fiber reinforced concrete structures during cyclic loading: Influence of frictional sliding and crack roughness

Toward virtual design and optimization of a structural test monitored by a multi-view system

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