Accurate and computationally efficient nonlinear static and dynamic analysis of reinforced concrete structures considering damage factors

Mourlas, Christos; Markou, George; Papadrakakis, Manolis

doi:10.1016/j.engstruct.2018.10.034

Cited by 35 publications

(67 citation statements)

References 41 publications

(65 reference statements)

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“…According to the solution strategy and the material modeling of concrete [2], when the criterion of crackclosure is satisfied at a Gauss Point (assuming that this point had prior to that only one crack formation), a part of the stiffness is lost along the crack plane at this Gauss Point to account for the damage accumulation due to the opening and closing of the under study crack. Therefore, the proposed damage factor [2] modifies the constitutive matrix of concrete accordingly to model the stiffness deterioration. The damage factor is denoted as DC and describes the accumulated energy loss due to the number of times a crack has opened and closed.…”

Section: Concrete Materials Modeling and Damage Factormentioning

confidence: 99%

“…Additionally, the material deterioration that occurs due to the opening and closing of cracks affects the bonding relation between the steel reinforcement and the damaged concrete domain that contains them. In order to take into account this loss of bonding, a modification of the steel stress-strain relation of Menegotto-Pinto [6] was proposed in [2]. Therefore, pinching characteristics that are caused by the loss of bonding between steel reinforcement and its surrounding concrete medium can be taken into account indirectly by reducing the stiffness contribution of the steel reinforcement [2].…”

Section: Concrete Materials Modeling and Damage Factormentioning

confidence: 99%

“…In order to take into account this loss of bonding, a modification of the steel stress-strain relation of Menegotto-Pinto [6] was proposed in [2]. Therefore, pinching characteristics that are caused by the loss of bonding between steel reinforcement and its surrounding concrete medium can be taken into account indirectly by reducing the stiffness contribution of the steel reinforcement [2]. In order to numerically establish such a connection, the average of all parameters a (Eq.…”

Section: Concrete Materials Modeling and Damage Factormentioning

confidence: 99%

“…It can be easily seen that all the displacement increments require a minimal number of iterations to achieve convergence, regardless the degree of nonlinear behavior of the model. As it can be seen, the required internal iterations per dynamic step during the solution procedure were limited to 1 to 2, underlining the numerical stability of the proposed modeling method [2]. The computational time for the nonlinear solution procedure is given in Table 4, which refers to the solution of 12,125 dynamic time increments.…”

Section: Three-storey Three-bay Rc Frame Subjected To High Intensitymentioning

confidence: 99%

“…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. The numerical accuracy and robustness of the proposed modeling method [2] is investigated by comparing the numerical results with the experimental data of two beam-column frame joints, a shear wall and a three-storey three-bay RC frame.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

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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Section: Concrete Materials Modeling and Damage Factormentioning

confidence: 99%

Section: Concrete Materials Modeling and Damage Factormentioning

confidence: 99%

Section: Concrete Materials Modeling and Damage Factormentioning

confidence: 99%

Section: Three-storey Three-bay Rc Frame Subjected To High Intensitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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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show abstract

Assessment of the Structural Response of Steel Reinforced and Steel-Fibre Reinforced Concrete Structures with 3D Detailed Modeling: Limitations and Remedies

Papadrakakis

Markou

2022

Current Trends and Open Problems in Computational Mechanics

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Towards a unified nonlocal, peridynamics framework for the coarse-graining of molecular dynamics data with fractures

You

et al. 2023

Appl. Math. Mech.-Engl. Ed.

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Molecular dynamics (MD) has served as a powerful tool for designing materials with reduced reliance on laboratory testing. However, the use of MD directly to treat the deformation and failure of materials at the mesoscale is still largely beyond reach. In this work, we propose a learning framework to extract a peridynamics model as a mesoscale continuum surrogate from MD simulated material fracture data sets. Firstly, we develop a novel coarse-graining method, to automatically handle the material fracture and its corresponding discontinuities in the MD displacement data sets. Inspired by the weighted essentially non-oscillatory (WENO) scheme, the key idea lies at an adaptive procedure to automatically choose the locally smoothest stencil, then reconstruct the coarse-grained material displacement field as the piecewise smooth solutions containing discontinuities. Then, based on the coarse-grained MD data, a two-phase optimization-based learning approach is proposed to infer the optimal peridynamics model with damage criterion. In the first phase, we identify the optimal nonlocal kernel function from the data sets without material damage to capture the material stiffness properties. Then, in the second phase, the material damage criterion is learnt as a smoothed step function from the data with fractures. As a result, a peridynamics surrogate is obtained. As a continuum model, our peridynamics surrogate model can be employed in further prediction tasks with different grid resolutions from training, and hence allows for substantial reductions in computational cost compared with MD. We illustrate the efficacy of the proposed approach with several numerical tests for the dynamic crack propagation problem in a single-layer graphene. Our tests show that the proposed data-driven model is robust and generalizable, in the sense that it is capable of modeling the initialization and growth of fractures under discretization and loading settings that are different from the ones used during training.

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Accurate and computationally efficient nonlinear static and dynamic analysis of reinforced concrete structures considering damage factors

Cited by 35 publications

References 41 publications

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

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

Assessment of the Structural Response of Steel Reinforced and Steel-Fibre Reinforced Concrete Structures with 3D Detailed Modeling: Limitations and Remedies

Towards a unified nonlocal, peridynamics framework for the coarse-graining of molecular dynamics data with fractures

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