Efficiency of Damage-Plasticity Models in Capturing Compaction-Expansion Transition of Concrete Under Different Compression Loading Conditions

Mousavi, Reza; Champiri, Masoud Dehghani; Willam, Kaspar

doi:10.7712/100016.1810.12018

Cited by 5 publications

(8 citation statements)

References 17 publications

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“…Since the concrete is a granular material, it is susceptible to volumetric strain generated during plastic deformation when it is subjected to shear deformations [12]. The potential plastic flow of concrete material in CDP used two input parameters, (ψ), and (є) as shown in Fig.…”

Section: Concrete Damage Plasticitymentioning

confidence: 99%

Employment of damage plasticity constitutive model for concrete members subjected to high strain-rate

Altaee¹,

Kadhim²,

Altayee³

et al. 2020

Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart

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Concrete damage plasticity (CDP) model is used to model the concrete damage through using ABAQUS software. Among several input parameters that should be defined in CDP model, the dilation angle (ψ), eccentricity parameter and tensile behaviour, have been identified as a significant influence on the finite element (FE) results for concrete modelling under static loading while limited studies examined these parameters for concrete subjected to impact load and high-strain rate. This study aims to focus on numerical modelling of impact-loaded concrete, examine and calibrate the above CDP model parameters using three-dimensional FE modelling. Several values of dilation angles, ψ, of 30 to 55 0 and eccentricity parameter of 0.1 to 0.2 have been used to capture the test behaviour. The model tensile softening behaviour was also investigated using three models, bilinear stress-strain, tri-linear stress-strain and stress-crack opening displacement. The FE results revealed that the value of dilation angle ranged 45-50 0 , the eccentricity parameter and tri-linear stress-strain model of tensile softening provided better correlations with test results in terms of displacement-time plots and cracking paths.

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Section: Concrete Damage Plasticitymentioning

confidence: 99%

Employment of damage plasticity constitutive model for concrete members subjected to high strain-rate

Altaee¹,

Kadhim²,

Altayee³

et al. 2020

Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart

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“…The concrete models in LS-DYNA (Hallquist 2006) include Karagozian and Case model (concrete damage model, MAT-72) ( Brannon and Leelavanichkul 2009;Malvar et al 1997), the Riedel-Hiermaier-Thoma model (MAT-272) (Borrvall and Riedel 2011;Hansson and Skoglund 2002), the BrannonFossum model (Fossum et al 2004), and the continuous surface cap model (CSCM, MAT-159) (Murray 2007). Among these, CSCM has many applications in the literature (Bermejo et al 2011;Champiri et al 2015aChampiri et al , b, 2016Farage et al 2004;Mousavi et al 2016) as it uses only two parameters: uniaxial compressive strength and maximum size of aggregate in the simplest version while other material models need many input parameters. CSCM uses the Duvaut-Lions formulation (Simo et al 1988) and it is a cap model with a smooth or continuous intersection between the failure surface and the hardening cap.…”

Section: Continuous Cap Surface Model For Concretementioning

confidence: 99%

Effect of Alkali-Silica Reactivity Damage to Tip-Over Impact Performance of Dry Cask Storage Structures

Champiri¹,

Mousavi²,

Willam³

et al. 2018

Int J Concr Struct Mater

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This paper investigates the effect of concrete degradation due to alkali-silica reactivity (ASR) and its effect on the performance of vertical concrete casks in the case of a hypothetical tip-over event. ASR is one of the major problems in certain concrete structures exposed to high relative humidity and temperature. Using the first order kinetic model, the mechanical and environmental effects of degradation are modeled for a dry-cask storage structure under the conditions that ASR is completely extended. Following the degradation, a tip-over impact simulation was performed and compared with that of an intact cask in terms of failure modes, damage patterns, stresses, and accelerations. It was seen that concrete crushing and shear banding are major failure modes in the cask with intact concrete, but in the case of the ASR affected cask, the concrete is fully damaged and a longitudinal crack which separates the cask into two parts propagates through the outerpack.

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“…Two tests were performed for each of the fine and coarse aggregates to obtain the results shown in Table 3-8. [3][4][5][6][7][8][9] shows different tests performed on the fresh concrete. The results of these tests for the four mixes are shown in Table 3-9.…”

Section: Design Of Concrete Mixturesmentioning

confidence: 99%

Probabilistic Multi-Hazard Assessment of Dry Cask Structures

Bencturk¹,

Padgett²,

Uddin³

2017

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This study is focused on vertical concrete dry casks and their structural performance in seismic and tip-over events, aiming for risk estimation of large seismically induced motions (large sliding and tip-over) and structural damage due to the tip-over loads. Both numerical and experimental work was conducted to investigate the long-term performance of the concrete outerpacks with an exposed surface. Material level studies provided additional data to the existing literature on how to accelerate the corrosion and alkali-silica reactivity (ASR) in concrete without altering the key properties of the material to observe significant levels of deterioration in a short period of time. The developed methods are specifically geared towards large-scale applications of structural systems. Detailed thermal analysis was performed to determine the temperature distributions in both prototype and scaled casks. Tip-over experiments were performed on both intact and aged physical models of concrete casks to compare the structural performance in terms under combined aging and mechanical loading. The influence of shrinkage, creep and gravity loading in the long-term and combined ASR and tip-over impact were investigated using detailed numerical simulations. In the probabilistic assessments, the effect of different sources of aleatory and epistemic uncertainties on the structural performance of the dry casks are studied, and probabilistic models are developed for some of the key structural responses. Fragility curves are developed for seismic sliding motion and tip-over, as well as large acceleration in case of tip-over, and effect of different parameters' variations on the response is studied herein. Probabilistic seismic analysis on a portfolio of vertical concrete dry casks is performed in this study considering common cask configurations in the United States. Probabilistic seismic demand models for the maximum sliding distance and maximum angle of rotation of the casks are developed, and seismic fragility analysis and parameter study are performed. Seismic risk of large sliding motions and tip-over is estimated. In addition, finite element models are developed to analyze the structural response of a dry cask to impact tip-over loads considering the influence of material and structural parameter variations. Impact fragility curves are developed for the mean maximum acceleration of the cask in tip-over events, and effect of geometric and material properties on the response is investigated. 2 2 Volume V 3 3 Mass M 3 3 2.5. REFERENCES

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Efficiency of Damage-Plasticity Models in Capturing Compaction-Expansion Transition of Concrete Under Different Compression Loading Conditions

Cited by 5 publications

References 17 publications

Employment of damage plasticity constitutive model for concrete members subjected to high strain-rate

Employment of damage plasticity constitutive model for concrete members subjected to high strain-rate

Effect of Alkali-Silica Reactivity Damage to Tip-Over Impact Performance of Dry Cask Storage Structures

Probabilistic Multi-Hazard Assessment of Dry Cask Structures

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