Compression field modeling of confined concrete

Montoya, E.; Vecchio, Frank J.; Sheikh, Shamim A.

doi:10.12989/sem.2001.12.3.231

Cited by 20 publications

(12 citation statements)

References 8 publications

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“…This means that the integration point represents a part of the element volume and that the appearance of the crack does not necessarily mean the complete crushing/softening of that volume. Different models exist (Montoya et al, 2001;Shi and Nakano, 2001;Tiecheng et al, 2003) for describing tensile softening of the concrete. They are mainly based on the performed experiments with, respectively, recommended parameters.…”

Section: Modelling Of the Tensile Softening Of Cracked Concretementioning

confidence: 99%

Modified Mohr‐Coulomb – Rankine material model for concrete

Galić

Marović

Nikolić

2011

Engineering Computations

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Purpose -The main aim of this paper is to present a three-dimensional numerical material model for concrete which combines plasticity with a classical orthotropic smeared crack formulation. A further aim is to raise a discussion leading to the creation of a comprehensive computer programme for the analyses of reinforced and prestressed concrete structures. Design/methodology/approach -A new numerical material model for concrete is developed and main theoretical explanations are given to aid in understanding the algorithm. The model is based on Mohr-Coulomb criterion for dominant compression and Rankine criterion for dominant tension influences. A multi-surface presentation of the model is implemented which permits the rapid convergence of the mathematical procedure. The model includes associated and non-associated flow rules, strain hardening and softening where the development of the plastic strain was described by the function of cohesion. Findings -Provides information about developing a new numerical material model for concrete. Practical implications -The model is implemented into the computer programme PRECON3D for the three-dimensional nonlinear analysis of the reinforced and prestressed concrete structures. Originality/value -In this model, the very complex behaviour of concrete is defined by elementary material parameters which can be obtained by a standard uniaxial test. The presented model enables a very detailed and precise analysis of reinforced and prestressed concrete structures until crushing with a high accuracy, so that the expensive experimental tests can be reduced. The paper could be very valuable to researchers in this field as a benchmark for their analyses.

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Section: Modelling Of the Tensile Softening Of Cracked Concretementioning

confidence: 99%

Modified Mohr‐Coulomb – Rankine material model for concrete

Galić

Marović

Nikolić

2011

Engineering Computations

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“…These assumptions, namely (a) ignoring local buckling in the longitudinal reinforcement, (b) ignoring the flexural stiffness of transverse reinforcement, (c) ignoring the effect of cover spalling and (d) ignoring geometric nonlinearity (second order effects), are also adopted in the majority of similar studies on the issue of confinement (e.g. [22,29,32] amongst others), wherein a discussion of the implications of these assumptions is lacking.…”

Section: Further Modelling Considerationsmentioning

confidence: 99%

Numerical study of confinement effectiveness in solid and hollow reinforced concrete bridge piers: Methodology

Papanikolaou

Kappos

2009

Computers & Structures

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a b s t r a c tA consistent methodology is suggested for modelling confinement in both solid and hollow reinforced concrete bridge pier sections, within the computational framework of three-dimensional nonlinear finite element analysis. The ultimate goal is to suggest the most convenient transverse reinforcement arrangements in terms of enhanced strength and ductility, as well as ease of construction and cost-effectiveness. The present study is particularly relevant with respect to confinement of hollow sections, for which previous experimental and analytical research is limited. Constitutive laws, modelling techniques, post-processing issues and preliminary applications are first introduced, and a large parametric model setup for circular and rectangular bridge piers of solid and hollow section, is subsequently presented. A detailed discussion follows on various issues concerning confinement modelling, aiming to broaden the scope and applicability of the suggested methodology. The respective numerical results and their interpretation and evaluation will be presented in a companion paper.

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“…Experimental studies on concrete columns [1,2] have shown that the favorable effect of passive confinement depends on various parameters such as the transverse reinforcement strength, amount, spacing and configuration. Other authors (see for instance [3][4][5][6][7][8][9][10][11]) have proposed confinement models suggesting semi-empirical confinement effectiveness factors for scaling the uniaxial monotonic stress-strain relationship of unconfined concrete to account for the triaxial stress state induced by the restrained lateral expansion of concrete due to the transverse reinforcement. In order to overcome these limitations, a recent study [8] suggests that the application of nonlinear finite element analysis would be beneficial to fully understand the triaxial behavior of confined concrete employing constitutive laws for concrete available in technical literature [3,6,7,12].…”

Section: Introductionmentioning

confidence: 99%

“…Other authors (see for instance [3][4][5][6][7][8][9][10][11]) have proposed confinement models suggesting semi-empirical confinement effectiveness factors for scaling the uniaxial monotonic stress-strain relationship of unconfined concrete to account for the triaxial stress state induced by the restrained lateral expansion of concrete due to the transverse reinforcement. In order to overcome these limitations, a recent study [8] suggests that the application of nonlinear finite element analysis would be beneficial to fully understand the triaxial behavior of confined concrete employing constitutive laws for concrete available in technical literature [3,6,7,12]. The application of these models to TBM (tunnel boring machine) lining joints is often not reported in literature (see for instance [13][14][15][16][17]) and, in practice, is mainly based on the results obtained in the tests carried out before the execution of the fourth tunnel beneath the Discussion on this paper must be submitted within two months of the print publication.…”

Section: Introductionmentioning

confidence: 99%

An application of confined concrete modeling to three‐dimensional nonlinear finite element analysis: The example of tunnel boring machine lining joints

Iasiello

Caldentey

Červenka

et al. 2020

Structural Concrete

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The aim of this paper is to present through a practical example, some recommendations to properly model confined concrete in three-dimensional nonlinear finite element analysis. The example chosen is of particular interest for tunneling and structural engineers as it compromises the joints between segments of the concrete lining used with the tunnel boring machine technique. These sections are designed to transmit high pressures, sometimes exceeding the Standards' recommendations. To carry out the nonlinear finite element analyses (NLFEAs) a dedicated software, was employed. A discussion about which parameters play a fundamental role to efficiently model the problem is carried out. Finally, a comparison between NLFEA results and an experimental campaign is presented highlighting the differences in terms of stress values within the steel bars, the failure mechanism and evaluation of the contribution of steel to the resistance of confined concrete.

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Compression field modeling of confined concrete

Cited by 20 publications

References 8 publications

Modified Mohr‐Coulomb – Rankine material model for concrete

Modified Mohr‐Coulomb – Rankine material model for concrete

Numerical study of confinement effectiveness in solid and hollow reinforced concrete bridge piers: Methodology

An application of confined concrete modeling to three‐dimensional nonlinear finite element analysis: The example of tunnel boring machine lining joints

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