FE analysis of size effects in reinforced concrete beams without shear reinforcement based on stochastic elasto-plasticity with non-local softening

Korol, E. Z.; Tejchman, J.; Mróz, Z.

doi:10.1016/j.finel.2014.05.005

Cited by 33 publications

(19 citation statements)

References 27 publications

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“…The size effect law (SEL) proposed by Bažant (1984) has been widely accepted and adopted in the evaluation of size effect behavior of RC members (Jin et al., 2016a, 2016b, 2016c, 2017; Li et al., 2016; Syroka-Korol et al., 2014, 2015; Xu et al., 2016). The SEL indicates that the nominal strength σ Nu of the concrete structure is as follows in which, B and D 0 are two empirical parameters to be identified by optimum fitting of measured σ Nu values covering a broad enough size range.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…At macroscopic scale, concrete could be regarded as a homogeneous material, while at mesoscopic scale it is treated as consisting of coarse aggregates and mortar matrix (Wriggers and Moftah, 2006). Many concrete nonlinear fracture models (Bažant and Jirasek, 2002; Jirasek and Zimmermann, 2001a, 2001b; Majewski et al., 2008; Pijaudier-Cabot et al., 2004; Skarżyński et al., 2011; Syroka-Korol, 2014, 2015; Yılmaz and Molinari, 2017), based on the theory of fracture mechanics and the nonlocal theory, have been established at macro-scale. The macroscopic computational models in the literatures are able to describe the nonlinear mechanical properties and the size effect behavior of concrete by including a characteristic length of microstructure.…”

Section: Experimental and Numerical Setupmentioning

confidence: 99%

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A combined experimental and numerical analysis on the seismic behavior of short reinforced concrete columns with different structural sizes and axial compression ratios

Jin

Zhang

et al. 2017

International Journal of Damage Mechanics

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The results of an experimental program on eight short reinforced concrete columns having different structural sizes and axial compression ratios subjected to monotonic/cyclic lateral loading were reported. A 3D mesoscopic simulation method for the analysis of mechanical properties of reinforced concrete members was established, and then it was utilized as an important supplement and extension of the traditional experimental method. Lots of numerical trials, based on the restricted experimental results and the proposed 3D mesoscopic simulation method, were carried out to sufficiently evaluate the seismic performances of short reinforced concrete columns with different structural sizes and axial compression ratios. The test results indicate that (1) the failure pattern of reinforced concrete columns can be significantly affected by the shear-span ratio; (2) increasing the axial compression ratio could improve the load capacity of the reinforced concrete column, but the deformation capacity would be restricted and the failure mode would be more brittle, consequently the energy dissipation capacity could be deteriorated; and (3) the load capacity, the displacement ductility, and the energy dissipation capacity of the short reinforced concrete columns all exhibit clear size effect, namely, the size effect could significantly affect the seismic behavior of reinforced concrete columns.

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Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Experimental and Numerical Setupmentioning

confidence: 99%

A combined experimental and numerical analysis on the seismic behavior of short reinforced concrete columns with different structural sizes and axial compression ratios

Jin

Zhang

et al. 2017

International Journal of Damage Mechanics

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“…All of the fracture models mentioned above are widely accepted by researchers and they are able to describe the size effect of concrete by including a characteristic length of concrete microstructure. In addition, the constitutive models with nonlocal softening [50][51][52][53][54][55][56][57] considering of the structural damage are also employed in the investigation of size effect in concrete structures and great progresses have been made. These kinds of fracture mechanical models predict a size effect if geometrically similar specimens (including notches) of different sizes are considered, such that the nominal strength r Nu decreases as the characteristic dimension D of the structure increases.…”

Section: Size Effect Analysis Based On Fracture Mechanicsmentioning

confidence: 99%

Mechanical behavior and size effect of moderate high-strength RC columns under monotonic and cyclic axial compression

Jin

Liu

2016

Engineering Structures

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“…ere is an obvious size effect phenomenon that the larger dimension structures more likely fail at relatively smaller loading. is phenomenon in quasi-brittle structures is related to a transition from ductile behavior of small specimens to a totally brittle response of large ones [4,5].…”

Section: Introductionmentioning

confidence: 99%

Mesoscopic Numerical Simulation of Fracture Process and Failure Mechanism of Concrete Based on Convex Aggregate Model

Peng

Chen

Ying

et al. 2019

Advances in Materials Science and Engineering

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To investigate the fracture process and failure mechanism of concrete subjected to uniaxial compressive loading, a new finite element method-the base force element method (BFEM)-was adopted in the modeling of numerical simulation. At mesoscale, concrete is considered as a three-phase heterogeneous material composed of aggregate particles, cement mortar, and the interfacial transition zones between the two phases. A two-dimensional random convex aggregate model was established using the principle of the area equivalence method. A multistage linear damage constitutive model that can describe nonlinear behavior of concrete under mechanical stress was proposed. e mechanical properties of concrete mesoscopic components are determined. e numerical simulation results indicate that the base force element method can be applied to predict the failure pattern of concrete under compressive loading, which have a good accordance with the available experiment data. e stress contour plots were given and used to analyze the failure mechanism of concrete. e effects of specimen size on the strength of concrete material were studied. It is found that compressive strength of concrete decreases as the specimen size increases. In addition, the influences of aggregate distribution, coarse aggregate content, and end friction on concrete performance are explored.

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FE analysis of size effects in reinforced concrete beams without shear reinforcement based on stochastic elasto-plasticity with non-local softening

Cited by 33 publications

References 27 publications

A combined experimental and numerical analysis on the seismic behavior of short reinforced concrete columns with different structural sizes and axial compression ratios

A combined experimental and numerical analysis on the seismic behavior of short reinforced concrete columns with different structural sizes and axial compression ratios

Mechanical behavior and size effect of moderate high-strength RC columns under monotonic and cyclic axial compression

Mesoscopic Numerical Simulation of Fracture Process and Failure Mechanism of Concrete Based on Convex Aggregate Model

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