Effects of Elevated Temperature and Irradiation on Performance Degradation of Concrete Structures

RONG Hua; JING Yuxiang; WANG Yulin; GENG Yan

doi:10.13204/j.gyjzG22062009

Volume 52 Issue 11

Nov. 2022

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2022 > 52(11): 133-138

Li Yi, Zhao Wen, Yan Yunqi. METHOD OF CONTINUAL ANALYSIS FOR SYSTEM RELIABILITY[J]. INDUSTRIAL CONSTRUCTION, 2005, 35(10): 26-28,39. doi: 10.13204/j.gyjz200510009

Citation:

RONG Hua, JING Yuxiang, WANG Yulin, GENG Yan. Effects of Elevated Temperature and Irradiation on Performance Degradation of Concrete Structures[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(11): 133-138. doi: 10.13204/j.gyjzG22062009

Li Yi, Zhao Wen, Yan Yunqi. METHOD OF CONTINUAL ANALYSIS FOR SYSTEM RELIABILITY[J]. INDUSTRIAL CONSTRUCTION, 2005, 35(10): 26-28,39. doi: 10.13204/j.gyjz200510009

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Effects of Elevated Temperature and Irradiation on Performance Degradation of Concrete Structures

doi: 10.13204/j.gyjzG22062009

RONG Hua^1,2,
JING Yuxiang^{1,2
,
,},
WANG Yulin³,
GENG Yan^1,2

1. Central Research Institute of Building and Construction Co., Ltd., MCC Group, Beijing 100088, China;
2. Inspection and Certification Co., Ltd., MCC, Beijing 100088, China;
3. China General Nuclear Power Group Co. Ltd., Shenzhen 518038, China

Received Date: 2022-06-20

Abstract

Abstract

To ensure the safe and reliable operation of nuclear power plants (NPPs) during their extended service lives, the performance of reinforced concrete structures in NPPs under long-term irradiation is quite important. A comprehensive framework of models was developed to predict the various properties and deformation of nuclear-irradiated concrete. The GSC model and the Mori-Tanaka model were used to characterize the mechanical and transport properties of concrete with multiple phases and multi-scale internal structures. The damage to the concrete’s mechanical properties resulting from irradiation and elevated temperature was estimated by using a composite damage mechanics approach. The transport properties in degraded concrete were calculated using multi-group diffusion equations, considering the temperature gradient and the damage induced by irradiation. Finally, all models were combined and implemented as a coupled radio-thermo-mechanical analysis to predict the long-term mechanical and transport responses of concrete. The work represents a comprehensive framework that can be used as user-defined material models combined with commercial finite element software products for future application of numerical analysis of concrete and reinforced concrete structures in nuclear power plants.
- nuclear power plant,
- irradiation,
- concrete,
- mechanical properties,
- damage,
- transport properties

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References

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