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High stress monitoring of prestressing tendons in nuclear concrete vessels using fibre-optic sensors

机译:使用光纤传感器对核混凝土容器中的预应力筋进行高应力监测

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摘要

Maintaining the structural health of prestressed concrete nuclear containments is a key element in ensuring nuclear reactors are capable of meeting their safety requirements. This paper discusses the attachment, fabrication and characterisation of optical fibre strain sensors suitable for the prestress monitoring of irradiated steel prestressing tendons. The all-metal fabrication and welding process allowed the instrumented strand to simultaneously monitor and apply stresses up to 1300MPa (80% of steel's ultimate tensile strength). There were no adverse effects to the strand's mechanical properties or integrity. After sensor relaxation through cyclic stress treatment, strain transfer between the optical fibre sensors and the strand remained at 69%. The fibre strain sensors could also withstand the non-axial forces induced as the strand was deflected around a 4.5 m bend radius. Further development of this technology has the potential to augment current prestress monitoring practices, allowing distributed measurements of short- and long-term prestress losses in nuclear prestressed-concrete vessels.
机译:维持预应力混凝土核安全壳的结构健康是确保核反应堆能够满足其安全要求的关键因素。本文讨论了适用于辐照钢预应力筋预应力监测的光纤应变传感器的连接,制造和表征。全金属的制造和焊接工艺使所测量的铸坯能够同时监测和施加高达1300MPa(钢极限抗拉强度的80%)的应力。对绞线的机械性能或完整性没有不利影响。通过循环应力处理使传感器松弛后,光纤传感器和线束之间的应变传递保持在69%。纤维应变传感器还可以承受在绞合线弯曲4.5 m弯曲半径时引起的非轴向力。这项技术的进一步发展有可能增强当前的预应力监测实践,从而可以对核预应力混凝土容器中的短期和长期预应力损失进行分布式测量。

著录项

  • 来源
    《Nuclear Engineering and Design》 |2014年第3期|35-40|共6页
  • 作者单位

    Institute for Energy and Environment, University of Strathclyde, 204 George Street, Glasgow G1 1XW, United Kingdom;

    Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, United Kingdom;

    Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, United Kingdom;

    Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, United Kingdom;

    Institute for Energy and Environment, University of Strathclyde, 204 George Street, Glasgow G1 1XW, United Kingdom;

    Civil Design Group, EDF Energy, Nuclear Generation, East Kilbride G74 5PG, United Kingdom;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-18 00:42:59

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