高温辐照对混凝土结构性能损伤影响研究

荣华; 荆玉翔; 王誉林; 耿岩

doi:10.13204/j.gyjzG22062009

高温辐照对混凝土结构性能损伤影响研究

doi: 10.13204/j.gyjzG22062009

荣华^1,2,
荆玉翔^1,2, ,,
王誉林³,
耿岩^1,2

1. 中冶建筑研究总院有限公司, 北京 100088;
2. 中冶检测认证有限公司, 北京 100088;
3. 中国广核集团有限公司, 广东深圳 518038

基金项目:

国家重点研发计划重点专项(2020YFB1901500)。

国家自然科学基金项目(52222808,52078509)

详细信息

作者简介:
荣华,女,1985年出生,博士,教授级高级工程师。

通讯作者:
荆玉翔,男,1988年出生,博士,jyxeng@gmail.com。

计量
- 文章访问数: 100
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- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2022-06-20

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

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

摘要

摘要: 为了确保核电站在延寿后安全可靠的运行,核电站的钢筋混凝土结构在长期辐照下的性能表现非常重要。建立了高温辐照混凝土力学性能退化的理论模型。通过GSC模型和Mori-Tanaka模型来描述混凝土的多相和多尺度内部结构及其力学和传输性能。使用复合损伤力学方法估算了辐照和高温对混凝土力学性能的影响。基于温度梯度和辐照引起的损伤,使用多组扩散方程计算了损伤混凝土的传输特性变化。最后,建立了辐照-热-力耦合机制作用下混凝土的长期性能表现的分析方法。建立的分析框架可以进一步与商用计算软件相结合,应用于核电站钢筋混凝土结构的服役性能动态评价中。
- 核电站 /
- 辐照 /
- 混凝土 /
- 力学性能 /
- 损伤 /
- 传输性能
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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参考文献(23)

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