GRIZZLY Model of Multi-Reactive Species Diffusion, Moisture/Heat Transfer and Alkali-Silica Reaction for Simulating Concrete Aging and Degradation

Huang, Hai; Spencer, Benjamin W.; Cai, Guowei

doi:10.2172/1244622

Cited by 11 publications

(11 citation statements)

References 43 publications

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“…Various heat capacity and thermal conductivity models, depending on the texture of concrete, temperature and relative humidity, were implemented in Grizzly code. Details of those nonlinear constitutive models for heat capacity and thermal conductivity can be found in [5].…”

Section: Heat Transfer Modelmentioning

confidence: 99%

“…Also it is worth noting that since the relative humidity strongly depends on the temperature T, the moisture diffusion model in Grizzly is always coupled with heat transfer model described in the previous section. Following Saumma et al [7], various moisture capacity and diffusivity constitutive models were implemented in Grizzly code [5].…”

Section: Moisture Diffusion Modelmentioning

confidence: 99%

“…. These input parameters collectively determine the stress-dependent ASR reaction kinetics (see [5] and [9] for more details).…”

Section: Stress-dependent Asr Swelling Modelmentioning

confidence: 99%

“…All mechanical deformations of specimens are induced by the axial stress (if any exist) and ASR reactions. Readers please refer to [5] for details of material parameter values used in our simulations. Figure 6 shows the comparisons between the simulated (lines) and measured (symbols) lateral strains for all three loading stresses under no confinement condition.…”

Section: Validations Of Asr Swelling Modelmentioning

confidence: 99%

“…Both ASR and radiation-induced volumetric expansion are highly dependent on the temperature and moisture content of concrete. We implemented a fully coupled moisture/heat transfer model, ASR swelling and rate-dependent damage mechanics model in Grizzly code [5]. This implementation includes a comprehensive set of constitutive models describing transport properties of concrete for moisture and heat, anisotropic stress-dependent ASR swelling constitutive model and a rate-dependent continuum damage mechanics model.…”

Section: Introductionmentioning

confidence: 99%

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Grizzly Model of Fully Coupled Heat Transfer, Moisture Diffusion, Alkali-Silica Reaction and Fracturing Processes in Concrete

Huang¹,

Spencer²

2016

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

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Idaho National Laboratory (INL) has been developing a fully coupled thermo-hydromechanical-chemical (THMC) concrete model, referred as Grizzly, with the ultimate goal of reliably simulating and predicting the long-term performance of concrete structures subjected to various aging and degradation mechanisms. In this paper, we present a fully coupled concrete model implemented in our Grizzly code for simulating coupled moisture/heat transfer, stressdependent ASR swelling and elastic/inelastic mechanics. Example simulation results and preliminary model validation results against experimental data reported in the literature will be provided also in this paper. The close matches between the simulation results and experiments clearly reveal the potential of the fully coupled solution strategy for solving tightly coupled THMC concrete models. We also present simulation results of using a rate-dependent damaging mechanics model for simulating the ASR swelling induced degradation of concrete structures and its feedback to moisture and heat transport processes.

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Section: Heat Transfer Modelmentioning

confidence: 99%

Section: Moisture Diffusion Modelmentioning

confidence: 99%

“…. These input parameters collectively determine the stress-dependent ASR reaction kinetics (see [5] and [9] for more details).…”

Section: Stress-dependent Asr Swelling Modelmentioning

confidence: 99%

Section: Validations Of Asr Swelling Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%