A computationally efficient model for the cyclic behavior of reinforced concrete structural members

Mourlas, Christos; Papadrakakis, Manolis; Markou, George

doi:10.1016/j.engstruct.2017.03.012

Cited by 25 publications

(41 citation statements)

References 34 publications

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“…The maximum principal value is set to the residual value, and the stress vector is transformed to a global coordinate system with the following formulas:

where:

—the residual stress coefficient (

), and

—the transformation matrix (calculated according to Reference [ 17 ]). In contrast to the aforementioned papers (e.g., References [ 20 , 21 , 22 ]), the stress in cracks is not set equal to zero due to different convergence criteria for the Newton scheme. During tests, it was found that the best stability of the incremental process is observed for

.…”

Section: Proposed Solution Strategymentioning

confidence: 99%

“…The implemented smeared crack model is based on the Rashid concept [ 42 ], which later was developed by Vidosa et al [ 43 ], Kotsovos and Spiliopoulos [ 44 ], Spiliopoulos and Lykidis [ 16 ], Markou and Papadrakakis [ 18 ], Mourlas et al [ 20 , 21 ], and Engen et al [ 22 ]. In this approach, the modification of stiffness properties and stress values is introduced in Gauss points, at which the stress state reached the ultimate surface.…”

Section: Proposed Solution Strategymentioning

confidence: 99%

“…They showed its engineering applicability by the analysis of, e.g., an RC bridge [ 19 ]. Mourlas et al have adapted the Kotsovos model to non-monotonic loads by the introduction of: an efficient cracks closure algorithm [ 20 ] and damage factors [ 21 ]. Engen et al [ 22 ] implemented this model in the DIANA code and showed its usefulness by the simulation of the behaviour of a large offshore shell structure.…”

Section: Introductionmentioning

confidence: 99%

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Numerically Efficient Three-Dimensional Model for Non-Linear Finite Element Analysis of Reinforced Concrete Structures

Dudziak

2021

Materials

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The paper concerns the non-linear finite element analysis (NLFEA) of Reinforced Concrete (RC) structures for engineering applications. The required level of complexity of constitutive models for such analysis was discussed and non-linear elastic models combined with the smeared cracking approach proved to be efficient. A new constitutive hypoelastic-brittle model of concrete based on these assumptions was proposed. Moreover, a method including the tension stiffening effect (TS) was developed. This phenomenon is connected with the bond properties between concrete and steel and, in some situations, has significant influence on the deflections of RC structures. It is often neglected by or included in the constitutive model of concrete. In the paper, an alternative approach was presented, in which this phenomenon is taken into account by generalising the material model of reinforcing steel. This approach is consistent with modern design standards and has solid physical foundations. The proposed models were implemented in the Abaqus code via UMAT user’s procedure coded in FORTRAN. Model verification and validation were presented in four case studies, concerning: a Willam’s test (examination on material point level), a beam with bending failure, and two beams with shear failure (with and without stirrups). The obtained results were compared with experimental outcomes and numerical results obtained by other researchers. The presented approach enables the accurate prediction not only of load capacity but of structural deformability, due to the precise description of TS. Thus, it promises to be a useful engineering tool.

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“…The maximum principal value is set to the residual value, and the stress vector is transformed to a global coordinate system with the following formulas:

where:

—the residual stress coefficient (

), and

.…”

Section: Proposed Solution Strategymentioning

confidence: 99%

Section: Proposed Solution Strategymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerically Efficient Three-Dimensional Model for Non-Linear Finite Element Analysis of Reinforced Concrete Structures

Dudziak

2021

Materials

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“…The proposed approach described in [1,2] and further investigated herein, emphasizes on the objectivity and the applicability of the proposed modeling method under nonlinear static cyclic and dynamic analysis of RC structures. In this research article, the proposed damage parameters for concrete and steel reinforcement that are proposed in [2], are further validated in capturing the accumulated material damage that is developed during cyclic and dynamic loading conditions, through the use of experimental data found in the international literature.…”

Section: Introductionmentioning

confidence: 99%

3d Detailed Modeling of Reinforced Concrete Frames Considering Accumulated Damage During Static Cyclic and Dynamic Analysis – New Validation Case Studies

Mourlas¹,

Markou²,

Papadrakakis³

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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The study of the hysteretic behavior of reinforced concrete members that undergo static cyclic and dynamic loading conditions in cases where the loading level is close to their carrying capacity, is a challenging open research subject, which currently is being investigated by many researchers. The development of an objective and robust 3D constitutive modeling approach that will be able to account for the accumulated material damage and stiffness deterioration is of great importance in order to realistically describe the physical failure mechanisms thus numerically study the seismic performance of RC structures. The adopted concrete material model in this research work is based on the material model proposed by Markou and Papadrakakis, which was an extension of the Kotsovos and Pavlovic work. Furthermore, the use of two newly proposed damage factors that are computed through the use of the number of opening and closing of cracks during the nonlinear cyclic analysis, are further investigated and their ability in capturing the accumulated material damage in both steel and concrete is further discussed in this research work. The numerical accuracy of the proposed method is validated by comparing the numerical results with the experimental data of two beam-column frame joints, a shear wall and a threestorey three-bay RC frame. According to the experimental setups, the RC joint and the shear wall specimens were tested under ultimate limit state cyclic loading, whereas the RC frame was tested under dynamic loading conditions. Based on the numerical findings, the proposed algorithm manages to capture the experimental results in an accurate manner and the numerical response of the understudy algorithmic implementation was found to exhibit computational robustness and efficiency.

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“…Figures 11 illustrate the Von Mises strain levels for the cyclic analysis of flexible base model at a roof displacement of 0.2m. The cyclic analysis material models that were used to perform this numerical investigation were based on the work presented by Mourlas et al [35].…”

Section: Force-deflection Responsementioning

confidence: 99%

Nonlinear Fea of Soil-Structure-Interaction Effects on Rc Shear Wall Structures

Saadi¹

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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A computationally efficient model for the cyclic behavior of reinforced concrete structural members

Cited by 25 publications

References 34 publications

Numerically Efficient Three-Dimensional Model for Non-Linear Finite Element Analysis of Reinforced Concrete Structures

Numerically Efficient Three-Dimensional Model for Non-Linear Finite Element Analysis of Reinforced Concrete Structures

3d Detailed Modeling of Reinforced Concrete Frames Considering Accumulated Damage During Static Cyclic and Dynamic Analysis – New Validation Case Studies

Nonlinear Fea of Soil-Structure-Interaction Effects on Rc Shear Wall Structures

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