Study on Failure Mechanism of Fiber‑reinforced Prestressed Concrete Containments under Internal Pressure

SUN Ye; ZHENG Zhi; SU Chunyang; PAN Xiaolan

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Study on Failure Mechanism of Fiber‑reinforced Prestressed Concrete Containments under Internal Pressure

更新时间：2025-09-25

- Study on Failure Mechanism of Fiber‑reinforced Prestressed Concrete Containments under Internal Pressure
- Journal of Disaster Prevention and Mitigation Engineering Vol. 43, Issue 3, Pages: 502-507(2023)
- 作者机构：
  
  太原理工大学土木工程学院，山西太原 030024
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU378.8
- Received：11 November 2021，
  
  Revised：2021-12-08，
  
  Published：28 June 2023
- 稿件说明：
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孙晔,郑志,苏春阳等.内压作用下纤维混凝土预应力安全壳破坏机理研究[J].防灾减灾工程学报,2023,43(03):502-507.

SUN Ye,ZHENG Zhi,SU Chunyang,et al.Study on Failure Mechanism of Fiber‑reinforced Prestressed Concrete Containments under Internal Pressure[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(03):502-507.
孙晔,郑志,苏春阳等.内压作用下纤维混凝土预应力安全壳破坏机理研究[J].防灾减灾工程学报,2023,43(03):502-507. DOI：

SUN Ye,ZHENG Zhi,SU Chunyang,et al.Study on Failure Mechanism of Fiber‑reinforced Prestressed Concrete Containments under Internal Pressure[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(03):502-507. DOI：

摘要

核电厂安全壳作为防止核放射性物质泄漏的最后一道屏障，提升安全壳的承载力尤为重要。大量研究显示纤维混凝土在力学性能、耐久性等方面具有显著优势，为了探究纤维混凝土在安全壳结构上的适用性并准确描述内压作用下纤维混凝土预应力安全壳的破坏机理，利用ABAQUS有限元软件，建立钢纤维、钢聚丙烯纤维、钢聚乙烯醇纤维增强安全壳精细化模型，施加内压荷载进行有限元分析。结果表明：（1）纤维混凝土安全壳破坏机理及变形规律与普通混凝土安全壳类似，混凝土中不同纤维的掺入均能有效延缓混凝土裂缝出现的时间，抑制裂缝开展的速度，减少钢衬里塑性损伤，大幅提升安全壳的极限内压。（2）钢纤维具有最佳的增强效果，但恶劣的服役环境下混杂纤维值得优先考虑。（3）局部替换纤维混凝土尤其是洞口区域附近，更有利于保持安全壳结构经济性与安全性的平衡。

Abstract

The containment vessel of a nuclear containment is the last barrier to prevent the leakage of radioactive materials from a nuclear power plant. It is particularly important to enhance the bearing capacity of the containments in nuclear power plants. Numerous studies have shown that fiber-reinforced concrete has significant advantages in terms of mechanical properties and durability. To authenticate the applicability of the fiber-reinforced concrete and accurately determine the failure mechanism of the fiber-reinforced prestressed concrete containment vessels， finite element models of the containment structure are constructed using ABAQUS code， which are reinforced with different types of fibers including steel fiber， steel polyvinyl alcohol （S-PVA） hybrid fiber， and steel polypropylene （S-PP） fiber. Their responses are analyzed under the internal pressure. The results demonstrate that：（1） The deformation and failure modes of fiber-reinforced concrete containments were similar to those of conventional concrete containments. Incorporating different fibers in concrete can effectively postpone the onset of concrete cracks， inhibit the development speed of cracks， reduce the plastic damage to the steel liner， and greatly increase the ultimate internal pressure of the containment. （2） Steel fiber has the best reinforcement effect， but hybrid fibers should be given priority in adverse service environments. （3） Implementing a partial replacement of fiber-reinforced concrete， especially near the equipment hatch holes， is more conducive to maintaining the balance between the economic and safety aspects of the containment structure.

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references

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