Lattice Discrete Particle Model for Fiber-Reinforced Concrete. II: Tensile Fracture and Multiaxial Loading Behavior

Schauffert, Edward A.; Cusatis, Gianluca; Pelessone, Daniele; O’Daniel, James L.; Baylot, James T.

doi:10.1061/(asce)em.1943-7889.0000392

Cited by 85 publications

(33 citation statements)

References 28 publications

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“…A number of lattice models for fibre reinforced concrete have been proposed in recent years [25][26][27][28]. These models are successful at capturing both the complex mesostructure and the physical mechanisms that occur in such a composite as well as the overall macroscopic behaviour.…”

Section: Introductionmentioning

confidence: 99%

A plastic-damage constitutive model for the finite element analysis of fibre reinforced concrete

Mihai

Jefferson

Lyons

2016

Engineering Fracture Mechanics

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A unique constitutive model for fibre reinforced concrete (FRC) is presented, which combines a number of mechanics-based sub models for the simulation of directional cracking, rough crack contact and the crack-bridging action of fibres. The model also contains a plasticity component to simulate compressive behaviour. The plasticity component employs a frictional hardening/softening function which considers the variation of compressive strength and strain at peak stress with fibre content. Numerical results from a range of single-point and finite element simulations of experimental tests show that the model captures the characteristic behaviour of conventional fibre reinforced concrete with good accuracy.

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Section: Introductionmentioning

confidence: 99%

A plastic-damage constitutive model for the finite element analysis of fibre reinforced concrete

Mihai

Jefferson

Lyons

2016

Engineering Fracture Mechanics

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“…Furthermore it can be properly formulated to account for fiber reinforcement [17,18] and it was recently extended to simulate the ballistic behavior of ultra-high performance concrete (UHPC) [19]. In addition, LDPM was successfully used in structural element scale analysis using multiscale methods [20][21][22].…”

Section: The Lattice Discrete Particle Modelmentioning

confidence: 99%

Lattice discrete particle modeling (LDPM) of flexural size effect in over reinforced concrete beams

Alnaggar¹,

Pelessone²,

Cusatis³

2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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Abstract. At the macroscopic scale, concrete can be approximated as statistically homogeneous. Nevertheless, its macroscopic behavior shows quasi-brittleness, strain softening, and size effects evidencing a strong influence of material heterogeneity. A model naturally accounting for material heterogeneity is the Lattice Discrete Particle Model (LDPM). LDPM replaces the actual concrete mesostructure by an assemblage of discrete particles interacting through nonlinear and fracturing lattice struts. Each particle represents one coarse aggregate piece. Since the initial development, LDPM has shown superior material modeling capabilities. In this research, LDPM is used to simulate the flexural failure of three groups of over reinforced concrete beams. The groups represent 1D, 2D and 3D geometric similarities. Geometry is generated based on concrete mix design. Then calibration was only guided by the experimentally provided compressive strength. In order to reduce the redundancy of the calibration process, the fracture properties of concrete were estimated using relevant literature. Finally, the rebar assembly was connected to the LDPM mesh using penalty type constraints and the rebars were modeled using 1D beam elements. Numerical results show excellent agreement with experimental data and clear capability of capturing size effects.

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“…Furthermore it can be properly formulated to account for fiber reinforcement [88,89] and it was recently extended to simulate the ballistic behavior of ultra-high performance concrete (UHPC) [90]. In addition, LDPM was successfully used in structural element scale analysis using multiscale methods [85,91,92] and was also used to simulate compression failure of confined concrete columns with FRP wrapping [87].…”

Section: Mechanical Behaviormentioning

confidence: 99%

“…This result can be then used to calculate an incompatible ASR strain, e 0 N , to be appl system assuming that strain additivity holds: [89], and d) ref. [35].…”

Section: Numerical Simulations and Comparison With Experimental Datamentioning

confidence: 99%

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Modeling Time-Dependent Behavior of Concrete Affected by Alkali Silica Reaction in Variable Environmental Conditions

Alnaggar¹,

Luzio²,

Cusatis

2017

Preprint

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Alkali Silica Reaction (ASR) is known to be a serious problem for concrete worldwide, especially in high humidity and high temperature regions. ASR is a slow process that develops over years to decades and it is influenced by changes in environmental and loading conditions of the structure. The problem becomes even more complicated if one recognizes that other phenomena like creep and shrinkage are coupled with ASR. This results in synergistic mechanisms that can not be easily understood without a comprehensive computational model. In this paper, coupling between creep, shrinkage and ASR is modeled within the Lattice Discrete Particle Model (LDPM) framework. In order to achieve this, a multi-physics formulation is used to compute the evolution of temperature, humidity, cement hydration, and ASR in both space and time, which is then used within physics-based formulations of cracking, creep and shrinkage. The overall model is calibrated and validated on the basis of experimental data available in the literature. Results show that even during free expansions (zero macroscopic stress), a significant degree of coupling exists because ASR induced expansions are relaxed by meso-scale creep driven by self-equilibriated stresses at the meso-scale. This explains and highlights the importance of considering ASR and other time dependent aging and deterioration phenomena at an appropriate length scale in coupled modeling approaches.

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Lattice Discrete Particle Model for Fiber-Reinforced Concrete. II: Tensile Fracture and Multiaxial Loading Behavior

Cited by 85 publications

References 28 publications

A plastic-damage constitutive model for the finite element analysis of fibre reinforced concrete

A plastic-damage constitutive model for the finite element analysis of fibre reinforced concrete

Lattice discrete particle modeling (LDPM) of flexural size effect in over reinforced concrete beams

Modeling Time-Dependent Behavior of Concrete Affected by Alkali Silica Reaction in Variable Environmental Conditions

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