Long-Term Performance of Dry Storage Structures

Champiri, Masoud Dehghani; Attar, Arezou; Hanifehzadeh, Mohammad; Willam, Kaspar; Gencturk, Bora

doi:10.1061/9780784479346.186

Cited by 7 publications

(8 citation statements)

References 3 publications

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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%

“…Geometry, Boundary Conditions and Meshing A 1/3-scale dry cask structure was selected to perform tipover simulation which was referred to in the literature (Champiri et al 2015a(Champiri et al , b, 2017Hanifehzadeh et al 2017). The scaled down dry cask structure shows the same behavior as the prototype cask with added mass when dynamic similitude is applied (Champiri et al 2017).…”

Section: 2mentioning

confidence: 99%

“…Kim et al (2007) studied shock-absorption characteristics of concrete pads for casks using ABAQUS explicit (Hibbitt, Karlsson and Sorensen, Incorporated 2002). Champiri et al (2015aChampiri et al ( , b, 2016 investigated the behavior of a degraded concrete dry cask storage structure under drop test and tip-over event using LS-DYNA (Hallquist 2006). However, the performance of a dry cask structure affected by ASR expansion under tip-over event has not been studied in detail to our knowledge.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Continuous Cap Surface Model For Concretementioning

confidence: 99%

Section: 2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…Karagozian and Case model (concrete damage model, MAT-72) [10], the Riedel-Hiermaier-Thoma model (RHT, MAT-272) [11,12], the Brannon-Fossum model (BF1) [13], and Continuous surface cap model (CSCM, MAT-159) [14] are some of those. Among them, MAT-159 has many applications in the literature [15,16], because this material uses two parameters including uniaxial compressive strength and maximum size of aggregate in the simplest version for concrete structures, while other materials need many inputs. This material model uses the Duvaut-Lions formulation [17] and its constitutive model will be addressed in the section 3 of this paper.…”

Section: Introductionmentioning

confidence: 99%

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

Mousavi¹,

Champiri²,

Willam³

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Abstract. The pre-and post-peak performance features of two widely used damage-plasticity constitutive formulations are assessed for modeling the multiaxial response behavior of pressure sensitive quasi-brittle materials such as concrete. Two benchmark problems have been solved using commercial software packages; ABAQUS which implements the two invariant LeeFenves damaged plasticity formulation as its main feature for concrete has been used along with LS-DYNA which is using Duvaut-Lion damage and plasticity model, a three invariant formulation. In order to have consistent results, the parameter identification and calibration for both models has been performed and response of both models has been compared to each other under uniaxial tension and compression. The two benchmark problem are triaxial compression CTC and triaxial tension CTE. The aim of this study is to observe the difference between two well-known material models in capturing the compaction to extension regime in the yielded material. The difference between the response of each material model and also the efficiency of input parameters in controlling of this transition has been studied in this paper. Based on these failure diagnostics, the main shortcomings of each formulation are discussed and possible enhancements and remedies are proposed for the pre-and post-peak feature.

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“…Kim et al [20] studied shock-absorption of a pad of a cask using ABAQUS explicit. Champiri et al [21][22] investigated the behavior of a thick-walled degraded concrete cylinder structure under a tip-over event using LS-DYNA.…”

Section: Introductionmentioning

confidence: 99%

Drop Test of Thick-Walled Concrete Cylinder Subjected to Shrinkage and Expansion

Champiri¹,

Mousavi²,

Hanifehzadeh³

et al. 2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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Two different models including confined cylinder with internal pressure and nonconfined cylinder of a concrete structure are selected for a drop test. With regard to internal pressure, the performance of these structures is compared considering the shrinkage strain which is calculated based on the latest model of RILEM called "B4" (RILEM report, 2014) and expansion which is normally due to alkali-silica reaction (ASR) effect on concrete and calculated based on the substantial experimental study of Larive (1998). The simulations were performed in LS-DYNA, which is suitable for high rate problems in form of explicit time integration. MAT_159 which is available in material library of LS-DYNA is used for the concrete. The failure modes due to the impact of the end drop test are studied.

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Long-Term Performance of Dry Storage Structures

Cited by 7 publications

References 3 publications

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

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

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

Drop Test of Thick-Walled Concrete Cylinder Subjected to Shrinkage and Expansion

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