Textile reinforced concrete multiscale mechanical modelling: Application to TRC sandwich panels

Djamai, Zakaria Ilyes; Bahrar, Myriam; Salvatore, Ferdinando; Larbi, Amir Si; Mankibi, Mohamed El

doi:10.1016/j.finel.2017.07.003

Cited by 45 publications

(19 citation statements)

References 18 publications

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“…In [ 15 ], a hierarchical micro-meso-macro model is presented, considering and linking the relevant mechanical effects at the different scales of TRC at uniaxial tension. A similar method for the 3D multiscale analysis of TRC sandwich panels is proposed in [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical Mesoscale Analysis of Textile Reinforced Concrete

2020

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This contribution presents a framework for Numerical Material Testing (NMT) of textile reinforced concrete based on the mesomechanical analysis of a Representative Volume Element (RVE). Hence, the focus of this work is on the construction of a proper RVE representing the dominant mechanical characteristics of Textile Reinforced Concrete (TRC). For this purpose, the RVE geometry is derived from the periodic mesostructure. Furthermore, sufficient constitutive models for the individual composite constituents as well as their interfacial interactions are considered, accounting for the particular mechanical properties. The textile yarns are modeled as elastic transversal isotropic unidirectional layers. For the concrete matrix, an advanced gradient enhanced microplane model is utilized considering the complex plasticity and damage behavior at multiaxial loading conditions. The mechanical interactions of the constituents are modeled by an interface formulation considering debonding and friction as well as contact. These individual constitutive models are calibrated by corresponding experimental results. Finally, the damage mechanisms as well as the load bearing behavior of the constructed TRC-RVE are analyzed within an NMT procedure based on a first-order homogenization approach. Moreover, the effective constitutive characteristics of the composite at macroscale are derived. The numerical results are discussed and compared to experimental results.

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Section: Introductionmentioning

confidence: 99%

Numerical Mesoscale Analysis of Textile Reinforced Concrete

2020

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“…Hybrid structures are made of structures and layers with different mechanical properties to significantly improve the structural strength. Nowadays, they are being studied and used, for example, a combination of textile-reinforced concrete containing fine-grained concrete and lightweight concrete [1], fiber reinforced cementitious matrix composite and concrete [2], concrete beam and fiber reinforced polymers composite [3], flexible pavement and semi-rigid pavement in the transportation engineering, etc. Experimental studies showed that debonding can occur at the matrix-fiber interface or at the matrix-concrete interface due to differences between materials, such as rigidity, crack density, porous density.…”

Section: Introductionmentioning

confidence: 99%

Modeling of contact interface between two material layers in hybrid structures

Nguyen

Nam

2020

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In hybrid structures, material layers of different mechanical properties are integrated to increase bearing capacity. When the difference in mechanical properties or thickness of the material layers is very large, debonding usually occurs along the interface between the two layers. This study uses a homogenization procedure combined with asymptotic algorithm applied on weaker/thinner materials to determine the interface stiffnesses for such structures. All the material layers and the interface are assumed to be linear elastic. Comprising with the available methods and numerical simulation results showed that the proposed model is more suitable with the work of the structures in reality. Furthermore, in this method the interface stiffnesses can be easily determined through the number and length of cracks and the dry or saturated state of the medium are also considered.

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“…The model classification in Figure 1 is focused on the representation of a the composite cross section. Finite element models based primarily on solid finite element discretization with an explicit resolution of material interfaces including also the localization of individual concrete cracks, presented e.g., in [19,20], have a different focus and different purpose, i.e., local stress effects in structural details of the simulation of TRC sandwich panels. For an efficient and realistic prediction of the nonlinear behavior of thin TRC shells, the layered shell models provide the appropriate dimensional reduction of the simulated boundary-value problem.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Non-Uniformly Reinforced Carbon Concrete Lightweight Ceiling Elements

Chudoba

Sharei²,

Senckpiel‐Peters

et al. 2019

Applied Sciences

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Featured Application: The present paper contributes to the discussion on modeling methods appropriate for the structural analysis of thin-walled concrete shells, a rapidly developing field of material and structural design utilizing the high-performance cementitious composites reinforced with non-metallic reinforcement. An effective modeling support is paramount for the derivation of reliable and economic design and assessment principles in a wide range of applications.Abstract: The paper focuses on the specifics of macro-scale modeling of thin-walled textile-reinforced concrete shells. Application of layered shell finite elements requires systematic procedures for identification of material characteristics associated with the individual layers within the cross section. The identification of the material parameters describing the tensile behavior of a composite cross section is done using data obtained from the tensile test. Such test is usually performed only for a reference configurations with a simple layup of fabrics and a chosen thickness. The question is how to derive the strain-hardening response from the tensile test that is relevant for a changed cross-sectional configuration. We describe and discuss scaling and mixture rules that can be used to modify the material parameters for modified cross-sectional layups. The rules are examined in the context of the test results obtained on a shell that was reinforced non-uniformly, with varying types of textile fabrics and varying thickness within the shell surface.

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Textile reinforced concrete multiscale mechanical modelling: Application to TRC sandwich panels

Cited by 45 publications

References 18 publications

Numerical Mesoscale Analysis of Textile Reinforced Concrete

Numerical Mesoscale Analysis of Textile Reinforced Concrete

Modeling of contact interface between two material layers in hybrid structures

Numerical Modeling of Non-Uniformly Reinforced Carbon Concrete Lightweight Ceiling Elements

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