Concrete Damage Plasticity Material Model Parameters Identification

Rakić, Dragan M.; Bodić, Aleksandar; Milivojević, Nikola J.; Dunić, Vladimir; Živković, Miroslav

doi:10.24874/jsscm.2021.15.02.11

Cited by 6 publications

(5 citation statements)

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“…All those equations presented in this section are implemented into the FEM software PAK as the implicit stress integration algorithm at the integration point level. More details regarding the implementation are available in the literature (Raki c et al, 2019(Raki c et al, , 2021; Water institute Jaroslav Cerni and Faculty of Engineering, University of Kragujevac, 2017).…”

Section: Cdp Constitutive Modelmentioning

confidence: 99%

“…The CDP constitutive model describes mechanical behavior of concrete using the stress-strain dependence in uniaxial compression and uniaxial tension tests. By investigating the stress-strain response of the numerical simulations, one can notice that it is necessary to reduce the stress and the corresponding strain (Raki c et al, 2019(Raki c et al, , 2021, and to determine new material parameters which define uniaxial tension and uniaxial compression stressstrain dependence. Reducing the strength of the CDP model, which includes damage, gives a unique insight into the application of SRM to the constitutive models with damage feature.…”

Section: Introductionmentioning

confidence: 99%

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Strength reduction method for a factor of safety determination of damaged concrete structures

Rakić

Dunić

Živković

et al. 2023

International Journal of Damage Mechanics

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The paper presents the procedure for determining the factor of safety (FoS) using the strength reduction method (SRM) for the case of a concrete damage plasticity constitutive model. The SRM was originally used in a slope stability analysis and in its original form, this method was applied by reducing the shear strength of the material. Since damage in concrete occurs due to exceeding the normal stresses in the principal directions, and not due to exceeding the shear strength, this method was modified and adapted to the concrete damage plasticity constitutive model. Instead of reducing the failure surface, the parameters which describe the mechanical behavior in the case of uniaxial compression and uniaxial tension were reduced. In this way, the reduction of stress and the corresponding strain was carried out in the entire range of total strain, without changing the shape of the failure surface in the deviator plane. For the proposed methodology, a numerical algorithm was developed and implemented into the software PAK. The algorithm was verified through test examples and the obtained results were compared with analytically calculated FoS. The excellent agreement is observed between the FoS obtained by applying the proposed algorithm and the analytically calculated FoS.

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Section: Cdp Constitutive Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Strength reduction method for a factor of safety determination of damaged concrete structures

Rakić

Dunić

Živković

et al. 2023

International Journal of Damage Mechanics

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“…The concrete damage plasticity material model has its theoretical roots in the theory of plasticity and damage mechanics [58]. Historically, its origins are in the analysis of concrete structures; however, as already pointed out in the introduction, it is often used to investigate the behavior of masonry structures with good results.…”

Section: Concrete Damage Plasticity Modelmentioning

confidence: 99%

“…In fact, the formation of cracks is associated with dissipated energy and, consequently, with the damage process [40]. In general, the damaging process can affect different material properties, such as its anisotropy, its stiffness, or its strength [58]. Lubliner et al [39] originally considered one scalar damage variable linked to stiffness.…”

Section: Damage Parametersmentioning

confidence: 99%

About the Use of Concrete Damage Plasticity for Modeling Masonry Post-Elastic Behavior

Rainone,

Tateo,

Casolo

et al. 2023

Buildings

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Considering the high vulnerability of existing masonry buildings, which often have strategic or cultural value, professionals and specialized engineers are frequently required to model complex historical buildings. The approaches proposed by National Building Codes may not always be suitable for such cases, but more detailed approaches are necessary, relying on FEM continuum modeling and inelastic constitutive law. There are many constitutive laws proposed in the literature that allow us to accurately reproduce the mechanical behavior of masonry. However, they require the identification of several parameters that are not easy to determine. In this study, a sensitivity analysis of the parameters of a nonlinear constitutive law very popular for masonry modeling (the “Concrete Damage Plasticity—CDP” model) is conducted, considering literature tests of masonry panels under shear stress as the benchmark. The aim is to assess the influence of the main parameters of the model and compare them to one of the more commonly used Mohr–Coulomb failure criteria.

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“…Современные строительные нормы и правила, принятые в Российской Федерации 1 и за рубежом 2 , предписывают проводить расчеты железобетонных конструкций в нелинейной постановке с учетом реальных свойств бетона и арматуры. С одной стороны, проблема разработки методики расчета железобетонных конструкций с учетом трехосного напряженного состояния связана с необходимостью проведения дорогостоящих экспериментов [1][2][3][4][5]. С другой -предпосылки для успешного выполнения таких расчетов обусловлены развитием компьютерных технологий и разработкой численных методов строительной механики, в первую очередь метода конечных элементов [6][7][8][9][10].…”

Section: Introductionunclassified

Models of nonlinear deformation of concrete in a triaxial stress state and their implementation in the PRINS computational complex

Agapov,

Markovich,

Aidemirov

2023

Struct. Mech. of Eng. Const. and Build

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Modern construction standards and regulations prescribe to carry out calculations of concrete and reinforced concrete structures in a nonlinear formulation with account of the real properties of concrete and reinforcement. However, the most of finite-element program complexes cannot perform such calculations in a nonlinear formulation with account of plastic deformations of concrete and reinforcement. To solve this problem, a methodology has been developed and a solid finite element adapted to the PRINS computing complex has been created, which made it possible to perform calculations of reinforced concrete structures considering their actual work. The aim of the study - development and implementation of a method for calculating reinforced concrete structures under conditions of a three-dimensional stress state, considering both brittle fracture and elastic-plastic deformation of concrete. A finite-element methodology, algorithm, and program for calculation of massive reinforced concrete structures with account of plastic deformations of concrete have been presented. The methodology is based on the modified Willam and Warnke strength criterion supplemented with the flow criterion. Two models of volumetric deformation of concrete have been regarded: the elastic model at brittle failure and the ideal elastoplastic model. An eight-node finite element with linear approximating functions of displacements implementing the mentioned deformation models is created. Verification calculations of a massive concrete structure in three-axial compression testify to the accuracy and convergence of the developed finite elements. The PRINS can be effectively used by engineers of designing and scientific organizations to solve a wide class of engineering problems related to calculations of building structures.

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Concrete Damage Plasticity Material Model Parameters Identification

Cited by 6 publications

References 0 publications

Strength reduction method for a factor of safety determination of damaged concrete structures

Strength reduction method for a factor of safety determination of damaged concrete structures

About the Use of Concrete Damage Plasticity for Modeling Masonry Post-Elastic Behavior

Models of nonlinear deformation of concrete in a triaxial stress state and their implementation in the PRINS computational complex

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