Journal articles: 'Concrete damaged plasticity'

1

Hanif, M. U., Z. Ibrahim, K. Ghaedi, A. Javanmardi, and S. K. Rehman. "Finite Element Simulation of Damage In RC Beams." Journal of Civil Engineering, Science and Technology 9, no. 1 (April 30, 2018): 50–57. http://dx.doi.org/10.33736/jcest.883.2018.

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A concrete damage model has been incorporated in finite element code ABAQUS as concrete damaged plasticity model to examine the sensitivity of the damage, as ABAQUS has the model that is capable of stiffness degradation in cracking which is the basis of fracture mechanics. Nonlinear constitutive relationships for concrete and steel have been incorporated in the model. The static and dynamic response of the structure at 10 different damage levels is studied and the sensitivity of the damage model towards the presence of non-linearity has been discussed. The concrete damaged plasticity model is capable of predicting formation of cracks in concrete beams against any kind of loads, as the results match with the experimental results. It can be concluded that the concrete damaged plasticity is a versatile tool for modeling RC structures and careful choice of solution procedures for dynamic analysis can lead to accurate modeling of concrete using a few routine laboratory test results of the materials.

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Yang, Ke Jia, Zi Ling Xie, and Wei Li. "Application of RPC Constitutive Model in FEA." Applied Mechanics and Materials 578-579 (July 2014): 25–30. http://dx.doi.org/10.4028/www.scientific.net/amm.578-579.25.

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The damage evolution equation of RPC is established based on 2-parameter Weibull distribution. The constitutive relation of RPC is then calculated based on the damage evolution equation. The constitutive model of RPC is optimized by comparing experimental constitutive curve to models corresponding to different threshold strain. Based on the definition of damage index in ABAQUS, the damaged evolution equation in ABAQUS is recalculated based on the optimized constitutive relation. the concrete damaged plasticity model in ABAQUS is obtained using the aforementioned method. And the concrete damaged plasticity model is applied to three compression member and three simply supported beams with different reinforcements. The calculated stress-strain curve and deformation of three compression member and three beams is in accordance with the deformation characteristics of experiments, which verified the effectiveness of the proposed concrete damaged plasticity model of RPC.

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Ding, Hui, Jian Ping Wang, and Cheng Fan. "Application of Damaged Plasticity Model on Slab-Column Joints." Applied Mechanics and Materials 777 (July 2015): 13–17. http://dx.doi.org/10.4028/www.scientific.net/amm.777.13.

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By the analysis of reinforced concrete slab, combined with experiment tests the feasibility of damaged plasticity model for concrete. Using parametric analyses, further the plastic damage model of related parameters set methods were discussed, concrete dilatation Angle, viscous coefficient, tensile stiffness, tensile damage on the results, in order to the design of slab-column connections engineering personnel to provide the reference.

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Wu, Hai Lin, Xiao Fan Du, Shi He Qin, Yao Li, and Qun Li. "Influence of Concrete Tension Softening Properties on the Steel-Liner Reinforced Concrete Penstock." Applied Mechanics and Materials 275-277 (January 2013): 1544–48. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.1544.

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In combination with the practice of a large hydropower station, concrete damaged plasticity model is introduced into the steel-liner reinforced concrete penstock for the nonlinear analysis, the damage distribution rules of the surrounding concrete and the stresses of the steels are furtherly studied under the different tension softening characteristic curves, the conclusions can provide the reference for damage assessment of the surrounding concrete and the optimization allocation of the reinforcement for the penstock.

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Dulinska, Joanna M. "Cooling Tower Shell under Asynchronous Kinematic Excitation Using Concrete Damaged Plasticity Model." Key Engineering Materials 535-536 (January 2013): 469–72. http://dx.doi.org/10.4028/www.scientific.net/kem.535-536.469.

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The paper presents the analysis of the dynamic response of a cooling tower to moderate earthquake. To represent inelastic behavior of the concrete material of the tower under dynamic loading, the concrete damaged plasticity constitutive model was assumed. The model consists of the combination of non-associated multi-hardening plasticity and scalar damaged elasticity to describe the irreversible damage that occurs during the fracturing process. Two different models of seismic excitation were used. Initially, a classical model of uniform kinematic excitation was applied. In this model it was assumed that excitation at all supports was identical. Then, a model of non-uniform kinematic excitation, typical for large multiple-support structures, was introduced. In that model the wave passage along the foundation ring was taken into account. It occurred that the assumption of asynchronous excitation led to the increase of the dynamic response of the tower with respect to the assumption of uniform ground motion. The tensile damage (cracking) in some parts of the tower appeared and the stiffness of the concrete was degraded when non-uniformity of excitation was considered. This was due to the quasi-static effects resulting from changes of subsoil geometry during the shock. The analysis indicated that the classical assumption of uniform excitation may lead to non-conservative assessment of the dynamic response of the shell described with concrete damaged plasticity model.

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Hany, Najwa F., Elie G. Hantouche, and Mohamed H. Harajli. "Finite element modeling of FRP-confined concrete using modified concrete damaged plasticity." Engineering Structures 125 (October 2016): 1–14. http://dx.doi.org/10.1016/j.engstruct.2016.06.047.

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Ni, Zhen Qiang, and Qin Shu Cui. "Numerical Simulation of Z-Shaped Column Joints in RC Frame Based on Damage Plasticity Model." Applied Mechanics and Materials 777 (July 2015): 173–78. http://dx.doi.org/10.4028/www.scientific.net/amm.777.173.

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This research selected Z-shaped section column joints in RC frame as the investigating object and considered the mechanical parameters extracted from physical model test results, proposed the finite element model of concrete damaged plasticity. Combining concrete damage plasticity model parameters on ABAQUS of concrete constitutive relationship from appendix C of Code for design of concrete structures (GB50010-2010), add the concept of damage factor to Energy equivalence principle, construct finite element model of Z-shaped column joints in RC frame, and simulated the test process under horizontal cyclic loading. The analysis results indicate that the finite element model can perfectly simulate action. It can reflect the mechanical properties of Z-shaped column joints in frame under horizontal cyclic loading, which is proved correct and reliable.

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Han, Xue, and Zheng Liu. "Numerical Simulation on the Form of Reinforcement of Reinforced Concrete Beam with Openings." Applied Mechanics and Materials 444-445 (October 2013): 884–88. http://dx.doi.org/10.4028/www.scientific.net/amm.444-445.884.

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In order to research the stress performance of reinforced concrete beam with different forms of reinforcement around the openings, a numerical simulation on reinforced concrete beam with circle openings is made by using the finite element software. The constitutive relation of concrete offered by the 2010 edition of code for design of concrete structures and the concrete damaged plasticity model is adopted in this article. The damage factor is introduced in the process of modeling, which can reflect the damage of beams with different forms of reinforcement directly and help to reveal the failure mechanism of members. Thus we can propose the optimization of reinforcement method.

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Belyakov, Nikita, Olga Smirnova, Aleksandr Alekseev, and Hongbo Tan. "Numerical Simulation of the Mechanical Behavior of Fiber-Reinforced Cement Composites Subjected Dynamic Loading." Applied Sciences 11, no. 3 (January 26, 2021): 1112. http://dx.doi.org/10.3390/app11031112.

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The problem of damage accumulation in fiber-reinforced concrete to structures supporting underground workings and tunnel linings against dynamic loading is insufficiently studied. The mechanical properties were determined and the mechanism of destruction of fiber-reinforced concrete with different reinforcement parameters is described. The parameters of the Concrete Damaged Plasticity model for fiber-reinforced concrete at different reinforcement properties are based on the results of lab experiments. Numerical simulation of the composite concrete was performed in the Simulia Abaqus software package (Dassault Systemes, Vélizy-Villacoublay, France). Modeling of tunnel lining based on fiber-reinforced concrete was performed under seismic loading.

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Ahmed, Bilal, George Z. Voyiadjis, and Taehyo Park. "Damaged plasticity model for concrete using scalar damage variables with a novel stress decomposition." International Journal of Solids and Structures 191-192 (May 2020): 56–75. http://dx.doi.org/10.1016/j.ijsolstr.2019.11.023.

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Zhou, Feng, and Guangxu Cheng. "A Coupled Plastic Damage Model for Concrete considering the Effect of Damage on Plastic Flow." Mathematical Problems in Engineering 2015 (2015): 1–13. http://dx.doi.org/10.1155/2015/867979.

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A coupled plastic damage model with two damage scalars is proposed to describe the nonlinear features of concrete. The constitutive formulations are developed by assuming that damage can be represented effectively in the material compliance tensor. Damage evolution law and plastic damage coupling are described using the framework of irreversible thermodynamics. The plasticity part is developed without using the effective stress concept. A plastic yield function based on the true stress is adopted with two hardening functions, one for tensile loading history and the other for compressive loading history. To couple the damage to the plasticity, the damage parameters are introduced into the plastic yield function by considering a reduction of the plastic hardening rate. The specific reduction factor is then deduced from the compliance tensor of the damaged material. Finally, the proposed model is applied to plain concrete. Comparison between the experimental data and the numerical simulations shows that the proposed model is able to describe the main features of the mechanical performances observed in concrete material under uniaxial, biaxial, and cyclic loadings.

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Wosatko, Adam, Michał Szczecina, and Andrzej Winnicki. "Selected Concrete Models Studied Using Willam’s Test." Materials 13, no. 21 (October 24, 2020): 4756. http://dx.doi.org/10.3390/ma13214756.

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Willam’s test is a quick numerical benchmark in tension–shear regime, which can be used to verify inelastic (quasi-brittle) material models at the point level. Its sequence consists of two separate steps: uniaxial tension accompanied with contraction—until the tensile strength is attained; and next for softening (cracking) of the material—tension in two directions together with shear. A rotation of axes of principal strains and principal stresses is provoked in the second stage. That kind of process occurs during the analysis of real concrete structures, so a correct response of the material model at the point level is needed. Some familiar concrete models are selected to perform Willam’s test in the paper: concrete damaged plasticity and concrete smeared cracking—distributed in the commercial ABAQUS software, scalar damage with coupling to plasticity and isotropic damage—both implemented in the FEAP package. After a brief review of the theory, computations for each model are discussed. Passing or failing Willam’s test by the above models is concluded based on their results, indicating restrictions of their use for finite element computations of concrete structures with predominant mixed-mode fracture.

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Szwed, Aleksander, and Inez Kamińska. "Modification of Concrete Damaged Plasticity model. Part I: Modified plastic potential." MATEC Web of Conferences 117 (2017): 00160. http://dx.doi.org/10.1051/matecconf/201711700160.

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Dulinska, Joanna M., and Dorota Jasinska. "Performance of Steel Pipeline with Concrete Coating (Modeled with Concrete Damage Plasticity) Underseismic Wave Passage." Applied Mechanics and Materials 459 (October 2013): 608–13. http://dx.doi.org/10.4028/www.scientific.net/amm.459.608.

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The paper presents the analysis of the dynamic response of a steel pipeline with concrete coating to a real earthquakeregistered in central Poland in 2012. The peak ground acceleration of the shock was scaled up to maximal values predicted for this seismic zone. To represent theinelastic behavior of the material of the concrete coating under dynamic loading, the concrete damaged plasticity constitutive model was assumed.The modelallows to describeplastic strains and irreversible tensile and compression damage that occurs during the cracking process.For seismic analysis two models (uniform and non-uniform) of kinematic excitation were applied. In the modelof uniform excitation it was assumed that the motion of all supports was identical. Inthe model of non-uniform excitation, typical for long structures, the wave passage along the pipelinewith different velocities (500, 400 and 300 m/s) was taken into account. It occurred that for the model of uniform excitation the concrete material of the coating remained elastic with no tensile damage. For the model of non-uniform excitation, inelastic behaviour of the coating was observed. The plastic strain areas appeared above all supports. The tensile damage (cracking) wasalso noticed in these areas: the lower wave velocity was assumed, the greater area of concrete coating was affected by plastic strains and tensile damage (cracking). It was the consequence of the quasi-static effects which resulted from ground deformations imposed on the pipeline during the seismic shock.

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15

Ansari, MD Imteyaz, and Pankaj Agarwal. "Damage Index Evaluation of Concrete Gravity Dam Based on Hysteresis Behavior and Stiffness Degradation Under Cyclic Loading." International Journal of Structural Stability and Dynamics 17, no. 01 (January 2017): 1750009. http://dx.doi.org/10.1142/s0219455417500092.

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An assessment of seismic vulnerability of concrete gravity dams based on the fragility curves needs a well-defined damage index (DI) to define different states of damage. The DI formulation for other types of structures is not applicable to concrete gravity dams due to the change in failure mechanism. In this study, a definition of DI based on the factor of safety against sliding is attempted and correlated with the DI formulation based on the natural period of the structure and the maximum crest displacement with cumulative energy dissipation. The proposed DI relies on the nonlinear behavior of the concrete gravity dam model under cyclic testing. The hysteresis behavior is also verified through the finite element analysis by considering the damaged plasticity behavior of concrete.

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Chi, Yin, Min Yu, Le Huang, and Lihua Xu. "Finite element modeling of steel-polypropylene hybrid fiber reinforced concrete using modified concrete damaged plasticity." Engineering Structures 148 (October 2017): 23–35. http://dx.doi.org/10.1016/j.engstruct.2017.06.039.

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17

Zhao, Shaoyu, Shuli Fan, Jie Yang, and Sritawat Kitipornchai. "A spherical smart aggregate sensor based electro-mechanical impedance method for quantitative damage evaluation of concrete." Structural Health Monitoring 19, no. 5 (December 2, 2019): 1560–76. http://dx.doi.org/10.1177/1475921719888963.

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In this study, the concrete damage induced by compression is evaluated quantitatively using spherical smart aggregate sensor based on electro-mechanical impedance method. The sensitivity of the spherical smart aggregate sensor embedded in concrete cubes is investigated by comparing the electrical signals recorded during the compressive process with those of the smart aggregate sensor embedded in concrete cubes. Furthermore, the finite element model of concrete cube with an embedded spherical smart aggregate sensor is developed to simulate the concrete compressive tests. The concrete damaged plasticity constitutive model is utilized to simulate the concrete damage process. The numerical model is verified with the experimentally measured compressive test results. Finally, the damage volume ratio is presented to quantify the damage level of concrete based on the numerical model. The relationship between the root mean square deviation index of the conductance signatures obtained from experiments and the damage volume ratio computed by numerical simulation is established to quantify the concrete damage level. The results show that the spherical smart aggregate sensor is more sensitive than the smart aggregate sensor in monitoring the three-dimensional concrete structures. The proposed empirical fitting curve can effectively evaluate the concrete damage level quantitatively.

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Li, Shiwei, Yongqing Yang, Wangqing Wen, and Aiguo Yan. "Theoretical Framework for Creep Effect Analysis of Axially Loaded Short CFST Columns under High Stress Levels." Advances in Civil Engineering 2020 (May 21, 2020): 1–11. http://dx.doi.org/10.1155/2020/5694630.

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Due to its excellent mechanical performances, axially loaded concrete-filled steel circular tube (CFST) columns have been widely used in structural engineering. As an important long-term behaviour of CFST structures, the creep has an obvious nonlinear property under high stress levels, which makes the influence of creep more complicated. In this study, to analyze the impacts of nonlinear creep effect on the behaviour of axially loaded short CFST columns, a complete theoretical framework for coupling analysis of 3D creep effect and material nonlinearity was presented. First, the concrete damaged plasticity model with a uniform constraint (UCCDP) was established to simulate the plasticity and damage evolution of a concrete core. Next, based on the UCCDP, a method of 3D nonlinear creep analysis and a corresponding numerical analysis method were established and implemented in the ABAQUS secondary platform. Finally, by comparing the predicted results with the experimental results, it was observed that the method proposed to predict the creep of axially loaded short CFST columns had satisfactory accuracy.

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Huan, Yi, Qin Fang, Li Chen, and Yadong Zhang. "Evaluation of blast-resistant performance predicted by damaged plasticity model for concrete." Transactions of Tianjin University 14, no. 6 (October 29, 2008): 414–21. http://dx.doi.org/10.1007/s12209-008-0071-1.

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Kamińska, Inez, and Aleksander Szwed. "Modification of Concrete Damaged Plasticity model. Part II: Formulation and numerical tests." MATEC Web of Conferences 117 (2017): 00161. http://dx.doi.org/10.1051/matecconf/201711700161.

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Blikharskyy, Yaroslav. "Calculation of damage RC constructions according to deformation model." Theory and Building Practice 2020, no. 2 (November 20, 2020): 99–106. http://dx.doi.org/10.23939/jtbp2020.02.099.

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This article presents results of a theoretical study of reinforced concrete beams with damaged reinforcement. The change of micro-hardness of a reinforcing rebar’s with a diameter of 20 mm of A500C steel in the radial direction is investigated and the thickness of the heat-strengthened layer is established. It is established that the thickness of the thermo-strengthened steel layer of the reinforcing bar with a diameter of 20 mm of A500C is approximately 3 mm. It is shown that the strength characteristics of this layer are on 50% higher compared to the core material of the rebar, while the plasticity characteristics are lower. The aim of the work is to determine the strength and deformability of reinforced concrete structures without damaging the reinforcement and in case of damage. Determining the impact of changes in the physical characteristics of reinforcement on the damage of reinforced concrete structures, according to the calculation to the valid norms, in accordance with the deformation model. To achieve the goal of the work, theoretical calculations of reinforced concrete beams were performed according to the deformation model, according to valid norms. This technique uses nonlinear strain diagrams of concrete and rebar and is based on an iterative method. According to the research program 3 beam samples were calculated. Among them were undamaged control sample with single load bearing reinforcement of ∅20 mm diameter – BC-1; sample with ∅20 mm reinforcement with damages about 40% without changes in the physical and mechanical properties of reinforcement – BD-2 and sample with ∅20 mm reinforcement with damages about 40% with changes in the physical and mechanical properties of reinforcement – BD-3. The influence of change of physical and mechanical characteristics of rebar’s on bearing capacity of the damaged reinforced concrete beams is established.

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George, Jobin, J. S. Kalyana Rama, M. V. N. Siva Kumar, and A. Vasan. "Behavior of Plain Concrete Beam subjected to Three Point Bending using Concrete Damaged Plasticity (CDP) Model." Materials Today: Proceedings 4, no. 9 (2017): 9742–46. http://dx.doi.org/10.1016/j.matpr.2017.06.259.

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Szczecina, M., and A. Winnicki. "Selected Aspects of Computer Modeling of Reinforced Concrete Structures." Archives of Civil Engineering 62, no. 1 (March 1, 2016): 51–64. http://dx.doi.org/10.1515/ace-2015-0051.

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Abstract The paper presents some important aspects concerning material constants of concrete and stages of modeling of reinforced concrete structures. The problems taken into account are: a choice of proper material model for concrete, establishing of compressive and tensile behavior of concrete and establishing the values of dilation angle, fracture energy and relaxation time for concrete. Proper values of material constants are fixed in simple compression and tension tests. The effectiveness and correctness of applied model is checked on the example of reinforced concrete frame corners under opening bending moment. Calculations are performed in Abaqus software using Concrete Damaged Plasticity model of concrete.

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Arjmandi, Seyyed Aliasghar, and Maryam Yousefi. "Numerical Modelling of Seismic Behavior of Retrofitted RC Beam-Column Joints." Civil Engineering Journal 4, no. 7 (August 2, 2018): 1728. http://dx.doi.org/10.28991/cej-03091108.

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In the event of an earthquake, the beam-column joints in the reinforced concrete moment-resisting frame structures are affected by a high level of deformations and stresses. Due to these deformations and stresses, the joint can be damaged and even fractured in some cases. The failure of the beam-column joint can cause the building to collapse. In recent years, particular attention has been paid to strengthening joints in the substandard RC buildings. In this paper, the beam-column joint is investigated considering the nonlinear behavior for concrete and steel. For concrete, the damage plasticity model and for reinforcing steels bilinear plasticity model is used. Several examples of tested joints in the technical literature have been modeled before and after strengthening, then numerical and experimental results are compared. Seismic performance of joints has also been studied. The results of this research show good agreement between the results of finite element model and experimental results. Moreover, the retrofitting method have shown could improves the seismic performance of the joint.

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Zeng, Xiang. "Finite Element Analysis of Square RC Columns Confined by Different Configurations of Transverse Reinforcement." Open Civil Engineering Journal 11, no. 1 (June 30, 2017): 292–302. http://dx.doi.org/10.2174/1874149501711010292.

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Introduction:Square reinforced concrete (RC) columns with the confinement effect of transverse reinforcement perform well in ductility and have been used widely in RC structures. Its behavior is the classic topic of anti-seismic and anti-collapse analysis of RC structures. With the advancement of the finite element (FE) analysis technology, the general-purpose simulation tools such as ABAQUS and ANSYS have been universally used to analyze the behavior of structures and members, where the material constitutive model is a key problem in the analysis.Methods:In this study, a new uniaxial compressive stress-strain curve of the confined concrete considering confinement effect of transverse reinforcement in square RC columns was proposed for the concrete damaged plasticity model in ABAQUS to solve the problem that there is no proper uniaxial compressive stress-strain curve for the concrete damaged plasticity model to describe the behavior of concrete confined by transverse reinforcement. Based on the proposed stress-strain relationship, a FE model was developed to analyze the behaviour of laterally confined RC columns under concentric loading.Results:The finite element model is able to predict the response of the confined RC columns from different experiments with reasonable accuracy. Finally, a parametric study was conducted in order to evaluate the effect of confinement reinforcement configuration on the behavior of core concrete in square section.

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Jing, Hang, and Yong Quan Li. "Nonlinear Finite Element Analysis of Layered Steel Fiber Reinforced Concrete Beam." Applied Mechanics and Materials 166-169 (May 2012): 616–19. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.616.

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A simplified finite element model for analysis of the Layered steel fiber beams with the concrete damaged plasticity model has been presented. The numerical simulation of load-deflection curve of layered steel fiber reinforced concrete beam under three-point loads is performed using ABAQUS. The results of simulation are generally in conformance with the experiment. The results of numerical simulation show that layered steel fiber has little contribution to the elastic capacity of concrete beam. But it can improve the ultimate bearing capacity of concrete beam obviously. The bending collapse style of layered steel fiber reinforced concrete beam is different from plain concrete beam evidently with obvious ductile characteristic.

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Lu, Xiang, Liang Pei, Jiankang Chen, Zhenyu Wu, and Chen Chen. "Research and Application of a Seismic Damage Classification Method of Concrete Gravity Dams Using Displacement in the Crest." Applied Sciences 10, no. 12 (June 16, 2020): 4134. http://dx.doi.org/10.3390/app10124134.

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Concrete gravity dams are one of the most common water retention structures, some of which are located in seismically active regions. Determination of damage level after earthquakes plays an important role in assessing the safety behavior of concrete dams. Compared with the traditional performance parameters obtained from numerical simulations, such as the damage coefficient, energy dissipation, failure modes, and stress state, etc., the displacement of dams can be acquired from daily monitoring data conveniently and quickly. It is of great significance for the rapid and effective evaluation of dam properties after earthquakes. The residual displacement in the concrete gravity dam crest was adopted as the performance parameter in the paper, and the linear mapping function between the residual displacement and the damage coefficient was established based on the concrete damaged plasticity model (CDP). Based on the traditional classification method with damage coefficient, a residual displacement-based seismic damage classification method with corresponding level limits was proposed. The seismic fragility analysis of Guandi concrete gravity dam was conducted as an example to illustrate the presented methodology. The results indicate that the proposed method is reasonable, effective, and can be easily applied to different projects after slight modifications.

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Li, Zhen Bao, Chen Wang, and Wen Jing Wang. "The FEM Analysis of Mechanical Properties of RC Short Columns under Oblique Horizontal Seismic Action." Applied Mechanics and Materials 368-370 (August 2013): 1808–11. http://dx.doi.org/10.4028/www.scientific.net/amm.368-370.1808.

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Simulation analyses of RC short columns are conducted under oblique horizontal seismic action monotonically using ABAQUS software. Concrete damaged plasticity model is used for concrete. Ideal elastic-plastic model is taken for steels. The results show that when the axial compression ratio was relatively low, the capacity of the columns increased with the increasing of load angle, because of the effect of tensile bars. For the relatively high axial compression ratio, the bearing capacity decreased with the increasing of angle, because of the effect of concrete in compression area.

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Zhang, Hao, Hong Nan Li, and Zhe Wang. "Study on Strain Rate Effect in High-Rise Reinforced Concrete Shear Wall Structure." Advanced Materials Research 243-249 (May 2011): 5854–57. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.5854.

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The dynamic behavior affected by strain rate effect of the high-rise reinforced concrete shear wall structure subjected to seismic loading are analyzed by finite element software ABAQUS. The damaged plasticity model for concrete was used, and the strain rate effect of concrete and steel were considered. The nonlinear dynamic response results with strain rate effect are compared with the results without strain rate effect. The distribution of strain rate can not only influence the concrete and steel, but also have some effects on the dynamic response of the high-rise reinforced concrete shear wall structure. The strain rate effect is more prominent under the stronger seismic wave.

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Fedoroff, Alexis, and Kim Calonius. "Using the Abaqus CDP model in impact simulations." Rakenteiden Mekaniikka 53, no. 3 (July 4, 2020): 180–207. http://dx.doi.org/10.23998/rm.79723.

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The understanding and assessment of accidental crash scenarios on reinforced concrete structures is of high interest for safety issues. Although experimental research on this topic has already a long and successful history, there are many issues waiting to be solved as far as numerical simulations are concerned. In this article some particularities of the Abaqus Concrete Damaged Plasticity (CDP) model are investigated with the purpose of using efficiently the CDP model in impact loaded reinforced concrete structure simulations. In particular, the sensitivity of the simulation response with respect to model parameters and element size is studied. The simulation response is compared to measurements from benchmark impact tests on reinforced concrete plates.

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Zhang, Hao, Zi Hang Zhang, and Yong Qiang Li. "Nonlinear Dynamic Analysis of Prefabricated Concrete Shear Wall Structure under Seismic Excitation." Applied Mechanics and Materials 873 (November 2017): 259–63. http://dx.doi.org/10.4028/www.scientific.net/amm.873.259.

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The dynamic behavior of the prefabricated and cast in situ concrete shear wall structures subjected to seismic loading is investigated by finite element method. This paper adopted a prefabricated concrete shear wall in a practical engineering. The Precise finite element models of prefabricated and cast in situ concrete shear wall were established respectively by ABAQUS. The damaged plasticity model of concrete and kinematic hardening model of reinforcing steel were used. The top displacement, top acceleration, story drift ratio and base shear forceof prefabricated and cast in situ concrete shear wall under different seismic excitation were compared and analyzed. The earthquake resistant behaviorsof the two kinds of structuresare analyzed and compared. Results show that the performances of PC structure were equal to the cast-in-situ ones.

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Chen, Z. Y., W. Chen, W. Zhang, and M. L. Lou. "Effects of Axial Compression Ratio of Central Columns on Seismic Performance of a Multi-Story Underground Structure." International Journal of Computational Methods 13, no. 04 (July 4, 2016): 1641014. http://dx.doi.org/10.1142/s0219876216410140.

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High axial force in central columns induced by strong vertical earthquake component is one of the most important factors in failure of subway stations. In this paper, the pushover method is adopted to simulate nonlinear behaviors of a multi-story subway station in Shanghai with different axial compression ratios through the general purpose finite element code ABAQUS. To simulate concrete material degradation during an earthquake accurately, the concrete damaged plasticity model was selected to trace damage characteristics of central columns. The softening index was used to describe the damage of the overall structure. Numerical results showed that in the structure level, the increase of axial compression ratio leads to the remarkable decrease of the structure ductility. The value of the softening index become less, which implies that the range and magnitude of damage to the structure become less either. However it should be noted that damages may be concentrated on certain members of the structure, such as central columns which are commonly considered to be the weakest but most critical part of an underground structure. In the member level, numerical results also showed that the increase of axial compression ratio led to small eccentric compression failure of central columns and accelerated the development of their compression damage.

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Jiménez Rios, Alejandro, and Dermot O’Dwyer. "Numerical Modeling of Cob’s Nonlinear Monotonic Structural Behavior." International Journal of Computational Methods 17, no. 05 (June 19, 2019): 1940013. http://dx.doi.org/10.1142/s0219876219400139.

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It has been observed by performing simple and diagonal compression tests of cob wallettes that the structural behavior of cob is highly nonlinear. This paper presents the results obtained of the simulation of cob’s nonlinear monotonic behavior using two well-known finite element commercial packages. Pros and cons of different available constitutive material models are identified and discussed. Concrete (CONCR) and Concrete Damaged Plasticity (CDP) are considered as the constitutive material models that provide the more satisfactory results reproducing cob’s nonlinear monotonic behavior when using ANSYS and ABAQUS, respectively.

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Miarka, Petr, Stanislav Seitl, and Wouter De Corte. "Notch tip displacements of the concrete Brazilian disc test with central notch analysed by the concrete damaged plasticity model." Theoretical and Applied Fracture Mechanics 102 (August 2019): 122–50. http://dx.doi.org/10.1016/j.tafmec.2019.04.006.

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Hasan, Qais Abdulmajeed, Saad Faik Abbas Al-Wakel, and Aia Jaafar Sadeq. "Structural Behavior of a Coupled Concrete Dam-Reservoir system under Effect of Earthquake loads Using Concrete Damaged Plasticity Model." IOP Conference Series: Materials Science and Engineering 737 (March 6, 2020): 012035. http://dx.doi.org/10.1088/1757-899x/737/1/012035.

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Indriyantho, Bobby Rio, Imadeddin Zreid, Robert Fleischhauer, and Michael Kaliske. "Modelling of High Velocity Impact on Concrete Structures Using a Rate-Dependent Plastic-Damage Microplane Approach at Finite Strains." Materials 13, no. 22 (November 16, 2020): 5165. http://dx.doi.org/10.3390/ma13225165.

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Concrete is known as a quasi-brittle material and the microplane model has been proven to be a powerful method to describe its constitutive features. For some dynamic cases, however, numerous microplane models used successfully at small strains are not sufficient to predict the nonlinear behaviour of damaged concrete due to large deformations. In this contribution at hand, a combined plasticity-damage microplane model extended to the finite strain framework is formulated and regularised using implicit gradient enhancement to achieve mesh insensitivity and to obtain more stable finite element solutions. A modified smooth three surface Drucker–Prager yield function with caps is introduced within the compression-tension split. Moreover, a viscoplastic consistency formulation is implemented to deliver rate dependency at dynamic cases. In case of penetration into concrete materials, the proposed model is equipped with an element erosion procedure to yield a better approximation of crack patterns. Numerical examples on impact cases are performed to challenge the capability of the newly proposed model to existing experimental data.

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Wang, Q., K. K. Hou, J. Lu, Q. H. Dong, D. P. Yao, and Z. Lu. "Study on concrete damaged plasticity model for simulating the hysteretic behavior of RC shear wall." IOP Conference Series: Materials Science and Engineering 789 (June 6, 2020): 012065. http://dx.doi.org/10.1088/1757-899x/789/1/012065.

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Genikomsou, Aikaterini S., and Maria Anna Polak. "Finite element analysis of punching shear of concrete slabs using damaged plasticity model in ABAQUS." Engineering Structures 98 (September 2015): 38–48. http://dx.doi.org/10.1016/j.engstruct.2015.04.016.

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Li, Xian-Xing (Lambert). "Parametric study on numerical simulation of missile punching test using concrete damaged plasticity (CDP) model." International Journal of Impact Engineering 144 (October 2020): 103652. http://dx.doi.org/10.1016/j.ijimpeng.2020.103652.

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Kamińska, Inez. "A general form of Drucker-Prager type smooth and convex plastic potential. Part 2: Implementation in elastoplastic damaged material." MATEC Web of Conferences 196 (2018): 01041. http://dx.doi.org/10.1051/matecconf/201819601041.

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The new potential proposed in [1] is used to modify Concrete Damaged Plasticity [2] model. The formulas for plastic multiplier and elastoplastic stiffness tensor are derived and simple numerical test are performed to confirm validity of the change. Predictions of the modified model and the original model are compared. The comparison shows similar character of the resultant curves, although for some cases a distinct quantitative difference between the models is revealed.

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Dulinska, Joanna M., and Dorota Jasinska. "Plastic Behavior of Integral Bridge, Consisting of Supporting Steel Beams and Concrete Superstructure, under Spatially Varying Seismic Shock." Key Engineering Materials 626 (August 2014): 438–43. http://dx.doi.org/10.4028/www.scientific.net/kem.626.438.

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The paper presents the dynamic response of an integral bridge to an earthquake registered in Central Europe. The acceleration history of the shock was scaled up to peak ground accelerations predicted for this seismic zone (0.4 g). The seismic action was implemented in the form of two models of three dimensional kinematic excitation: uniform and non-uniform (spatially varying). In the uniform model the assumption was made that the motion of all supports of the bridge was identical. In the case of the spatially varying excitation the wave passage effect was taken into consideration, assuming that the seismic wave propagated along the bridge forcing subsequent supports of the bridge to repeat the same motion with a time delay dependent on the wave velocity. The structural system of the integral bridge consisted of steel girders and crossbars whereas the superstructure was made of a concrete material. To represent the inelastic behavior of the integral bridge during the earthquake, plastic models of both the steel and the concrete material were implemented. For the steel material the classical metal plasticity model with the dynamic failure model of progressive damage, provided by the ABAQUS software, was applied. For the concrete material of the superstructure the concrete damaged plasticity constitutive model was taken into consideration. It turned out that when the non-uniform excitation model was imposed, the tensile damage (cracking) and the degradation of the support zones of the concrete deck were more significant than in case of uniform excitation. The non-uniform excitation model also caused considerably higher inelastic strains of the steel girders and crossbars than the uniform model. This resulted from quasi-static effects caused by ground deformations imposed on the bridge supports during the seismic shock.

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Xu, Lihua, Cuimei Wei, and Biao Li. "Damage Evolution of Steel-Polypropylene Hybrid Fiber Reinforced Concrete: Experimental and Numerical Investigation." Advances in Materials Science and Engineering 2018 (December 12, 2018): 1–23. http://dx.doi.org/10.1155/2018/1719427.

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This paper presents an experimental investigation on the stress-strain behavior and damage evolution of steel-polypropylene hybrid fiber reinforced concrete (HFRC) with different fiber types, volume fractions, and aspect ratios. The damage evolution laws of HFRC were obtained using uniaxial cyclic compression and tension tests. The results show that the addition of hybrid fiber has a significant synergetic effect on the mechanical behavior of concrete. The peak strength, peak strain, toughness, and postpeak ductility of HFRC under both tension and compression are improved, and the damage accumulation and stiffness degradation are alleviated by increasing volume fractions of SF and PF, as well as aspect ratios of SF. Moreover, the steel fiber volume fraction shows a more pronounced effect than that of other considered factors on the enhancement of cyclic mechanical parameters of HFRC. Based on the unloading stiffness degradation process, analytical equations were, respectively, proposed to generalize the damage progression of HFRC under compression and tension, with the effects of hybrid fiber taken into consideration. Finally, the proposed uniaxial damage evolution equations combined with the calibrated concrete damaged plasticity (CDP) model in ABAQUS were used to predict the responses of HFRC materials and structural members subjected to shear and seismic loads. The comparisons between the numerical predictions and experimental results show a good agreement.

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Babu B., Ranjith, and Thenmozhi R. "Experimental and numerical studies on punching shear strength of concrete slabs containing sintered fly ash aggregates." Revista de la construcción 20, no. 1 (2021): 15–25. http://dx.doi.org/10.7764/rdlc.20.1.15.

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This paper presents experimental and numerical investigations on M30 Grade of concrete containing 40% of sintered fly ash aggregates (SFAs) on the punching behaviour of reinforced concrete (RC) slabs. Two 1000 x 1000 x 100 mm reinforced concrete slabs were cast and subjected to punching tests. The experimental results were compared with creating a nonlinear finite element programme using ABAQUS. This 3D Finite element analyses were performed with the appropriate modelling of element size and the constitutive modelling of concrete. The material parameters of the damaged plasticity model in ABAQUS were calibrated based on the test results of slab – plate connection. The comparison between experimental and numerical results indicates that the calibrated model correctly predicts the punching shear response of the slabs. A modification of 0.4 is introduced in MC2010 code.

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Joshani, M., S. S. R. Koloor, and Redzuan Abdullah. "Damage Mechanics Model for Fracture Process of Steel-Concrete Composite Slabs." Applied Mechanics and Materials 165 (April 2012): 339–45. http://dx.doi.org/10.4028/www.scientific.net/amm.165.339.

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Composite slab construction using permanent cold-formed steel decking has become one of the most economical and industrialized forms of flooring systems in modern building structures. Structural performance of the composite slab is affected directly by the horizontal shear bond phenomenon at steel-concrete interface layer. This study utilizes 3D nonlinear finite element quasi-static analysis technique to analyze the shear bond damage and fracture mechanics of the composite slabs. Fracture by opening and sliding modes of the plain concrete over the corrugated steel decking had been modeled with concrete damaged plasticity model available in ABAQUS/Explicit module. The horizontal shear bond was simulated with cohesive element. Cohesive fracture properties such as fracture energy and initiation stress were derived from horizontal shear bond stress versus end slip curves. These curves were extracted from bending tests of narrow width composite slab specimens. Results of the numerical analyses match the experimental results accurately. This study demonstrated that the proposed finite element model and analysis procedure can predict the behavior of composite slabs accurately. The procedure can be used as a cheaper alternative to experimental work for investigating the ultimate strength and actual fracture and damage behavior of steel-concrete composite slab systems.

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Elsawaf, Sherif A., and Saleh O. Bamaga. "Strength Capacity and Failure Mode of Shear Connectors Suitable for Composite Cold Formed Steel Beams: Numerical Study." Materials 14, no. 13 (June 29, 2021): 3627. http://dx.doi.org/10.3390/ma14133627.

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In this paper, the findings of numerical modeling of the composite action between normal concrete and Cold-Formed Steel (CFS) beams are presented. To obtain comprehensive structural behavior, the numerical model was designed using 3-D brick components. The simulation results were correlated to the experimental results of eight push tests, using three types of innovative shear connectors in addition to standard headed stud shear connectors, with two different thicknesses of a CFS channel beam. The proposed numerical model was found to be capable of simulating the failure mode of the push test as well as the behavior of shear connectors in order to provide composite action between the cold-formed steel beam and concrete using the concrete damaged plasticity model.

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Li, Bing, Shuang Meng, and Wei Hao Wang. "Finite Element Analysis of Recycled Concrete Filled Steel Tube in Bending State." Applied Mechanics and Materials 578-579 (July 2014): 269–73. http://dx.doi.org/10.4028/www.scientific.net/amm.578-579.269.

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The objective of this paper is to provide the references through finite element analysis for steel tube concrete beams bearing capacity settlement. The paper verified the correctness of the constitutive relation of concrete, the correctness and the model through the establishment of the concrete damaged plasticity model with recycled concrete details in the finite element analysis software ABAQUS. Then the stress characteristics of steel pipe concrete beam in bending condition under different substitution rate could be found through model calculation. The result is that the mid span bending - strain curve from simulation agreed to the experimental results, and the model is proved correct. Finally it came to the conclusions. Other things being equal, the recycled concrete filled square tube changed a lot in bending state when the substitution rate grows, but it didn’t occur to the circular one. In the meantime, the writer proposed the conjecture on the bearing capacity calculation of the two types of structure.

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Li, Haoxu, Xiao Guo, and Jiqiang Duan. "Numerical Simulation of Steel-Reinforced Reactive Powder Concrete Beam Based on Bond-Slip." Materials 14, no. 15 (July 27, 2021): 4176. http://dx.doi.org/10.3390/ma14154176.

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In this study, based on the concrete damaged plasticity (CDP) model in the ABAQUS software, various plastic damage factor calculation methods were introduced to obtain CDP parameters suitable for reactive powder concrete (RPC) materials. Combined with the existing tests for the bending performance of steel-reinforced RPC beams, the CDP parameters of the RPC material were input into ABAQUS to establish a finite element model considering the bond and slip between the steel and RPC for numerical simulation. The load-deflection curve obtained by the simulation was compared with the measured curve in the experiment. The results indicated that on the basis of the experimentally measured RPC material eigenvalue parameters, combined with the appropriate RPC constitutive relationship and the calculation method of the plastic damage factor, the numerical simulation results considering the bond-slip were in good agreement with the experimental results with a deviation of less than 10%. Thus, it is recommended to select a gentle compressive stress-strain curve in the descending section, an approximate strengthening model of the tensile stress-strain curve, and to use the energy loss method and Sidoroff’s energy equivalence principle to calculate the RPC plastic damage parameters.

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Xu, Lei, and Yefei Huang. "Effects of Voids on Concrete Tensile Fracturing: A Mesoscale Study." Advances in Materials Science and Engineering 2017 (2017): 1–14. http://dx.doi.org/10.1155/2017/7989346.

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A two-dimensional mesoscale modeling framework, which considers concrete as a four-phase material including voids, is developed for studying the effects of voids on concrete tensile fracturing under the plane stress condition. Aggregate is assumed to behave elastically, while a continuum damaged plasticity model is employed to describe the mechanical behaviors of mortar and ITZ. The effects of voids on the fracture mechanism of concrete under uniaxial tension are first detailed, followed by an extensive investigation of the effects of void volume fraction on concrete tensile fracturing. It is found that both the prepeak and postpeak mesoscale cracking in concrete are highly affected by voids, and there is not a straightforward relation between void volume fraction and the postpeak behavior due to the randomness of void distribution. The fracture pattern of concrete specimen with voids is controlled by both the aggregate arrangement and the distribution of voids, and two types of failure modes are identified for concrete specimens under uniaxial tension. It is suggested that voids should be explicitly modeled for the accurate fracturing simulation of concrete on the mesoscale.

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Nguyen, P. C., D. D. Pham, T. T. Tran, and T. Nghia-Nguyen. "Modified Numerical Modeling of Axially Loaded Concrete-Filled Steel Circular-Tube Columns." Engineering, Technology & Applied Science Research 11, no. 3 (June 1, 2021): 7094–99. http://dx.doi.org/10.48084/etasr.4157.

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Predicting the behavior of concrete in a Concrete-Filled Steel Tubular (CFST) column is challenging due to the sensitivity to input parameters such as the size of the cross-section, the material modeling, and the boundary conditions. The present paper proposes a new modified finite element model to predict the behavior and strength of a CFST subjected to axial compression. The development is based on the concrete damaged plasticity model, with its stress-strain relationship revised from the available model. The predicted accuracy of the modified model is verified via a wide range of experimental tests. The proposed model has more accuracy than the available models in predicting the ultimate compression strength. The results show good agreement with the test data, allowing its use in modeling CFST columns.

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Li, Ying, and Rong Guan Sun. "Stability Analysis of Tunnel Surrounding Rock and Shotcrete Lining and Rock Bolts Based on Strength Reduction Finite Element Method." Applied Mechanics and Materials 90-93 (September 2011): 1936–41. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.1936.

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Based on the practical engineering ,by using the 3D-FEM of elastic-plasticity, a reasonable model for simulation of tunnel excavation and shotcrete lining and rock bolts builds up, surrounding rock using Mohr-Coulomb constitutive model of ABAQUS, lining using Concrete Damaged Plasticity constitutive model, and bolt using elastic-plasticity constitutive model. By using strength reduction finite element method, analysis for safety coefficient of stability of surrounding rock with primary shotcrete lining and rock bolts under the four limit state criteria. It is concluded that the appearance of divergence of the computation may precede by displacement of characteristic points, The safety coefficient of the running-through of the plastic zone of the surrounding rock and the running-through of the plastic zone of the shotcrete and a great amount of rock bolts yielding are less than the divergence of the computation and displacement of characteristic points.

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Journal articles on the topic 'Concrete damaged plasticity'

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