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CFRP索阻燃防火措施

朱元林 刘礼华 黄盛彬 朱维军 朱小芳

朱元林, 刘礼华, 黄盛彬, 等. CFRP索阻燃防火措施[J]. 复合材料学报, 2022, 39(8): 3786-3793. doi: 10.13801/j.cnki.fhclxb.20210909.007
引用本文: 朱元林, 刘礼华, 黄盛彬, 等. CFRP索阻燃防火措施[J]. 复合材料学报, 2022, 39(8): 3786-3793. doi: 10.13801/j.cnki.fhclxb.20210909.007
ZHU Yuanlin, LIU Lihua, HUANG Shengbin, et al. Fire retardant measures of CFRP cable[J]. Acta Materiae Compositae Sinica, 2022, 39(8): 3786-3793. doi: 10.13801/j.cnki.fhclxb.20210909.007
Citation: ZHU Yuanlin, LIU Lihua, HUANG Shengbin, et al. Fire retardant measures of CFRP cable[J]. Acta Materiae Compositae Sinica, 2022, 39(8): 3786-3793. doi: 10.13801/j.cnki.fhclxb.20210909.007

CFRP索阻燃防火措施

doi: 10.13801/j.cnki.fhclxb.20210909.007
基金项目: 江苏省重点研发计划项目(BE2020018);江苏省第五期“333工程”科研资助项目(BRA2019145)
详细信息
    通讯作者:

    朱元林,博士,高级工程师,研究方向为先进复合材料结构设计技术  E-mail: zyl0510@hotmail.com

  • 中图分类号: TB330.1

Fire retardant measures of CFRP cable

  • 摘要: 为解决碳纤维增强树脂复合材料(Carbon fiber reinforced polymer,CFRP)索的火灾问题,开发了一种CFRP索的阻燃防火措施。对桥梁缆索用CFRP筋开展高温拉伸试验研究,并比较阻燃防火涂层、石棉、陶瓷纤维布的阻燃防火效果。结果显示,筋材高温剩余强度随温度升高呈线性下降趋势,210℃加热3 h,筋材剩余强度最低为2245.8 MPa,比原始强度下降26.13%;筋材高温加热再冷却后强度会存在一定程度的可逆性恢复,剩余强度均能达到2800 MPa以上,但较原始强度呈略微下降趋势,且加热温度越高,剩余强度越低;通过比较阻燃防火涂层具有较好效果,经2 h灼烧索股聚乙烯(PE)护套,内表面最高温度为206℃;阻燃防火涂层越厚,防护时间越长,刷有2 mm厚度阻燃防火涂层的索股在长达6 h的火焰灼烧下,PE护套内表面最高温度为245℃,PE护套未发生破坏,仅发生软化。研究表明,采用阻燃防火涂层可有效保护CFRP索,火灾2 h内,索股仍可承载,剩余强度>2245 MPa。

     

  • 图  1  碳纤维增强树脂复合材料(CFRP)筋高温拉伸试验

    Figure  1.  High temperature tensile test of carbon fiber reinforced polymer (CFRP) tendon

    图  2  不同温度下保温 2 h后的CFRP筋材抗拉强度

    Figure  2.  Tensile strength of CFRP tendons at different temperatures with heat preservation 2 h

    图  3  CFRP筋材高温拉伸破断状态

    Figure  3.  Tensile fracture state of CFRP tendons at high temperature

    图  4  210℃不同保温时间下的CFRP筋材抗拉强度

    Figure  4.  Tensile strength of CFRP tendons with different holding time at 210℃

    图  5  经历不同温度加热2 h冷却后CFRP筋材抗拉强度

    Figure  5.  Tensile strength of CFRP tendons after heating at different temperatures for 2 h and cooling

    图  6  持荷条件下CFRP筋阻燃防火措施对比

    Figure  6.  Comparison on fire retardant measures of CFRP tendons under load conditions

    图  7  CFRP筋材高温下树脂热解(562℃,2 h)

    Figure  7.  Resin pyrolysis of tendons at high temperature (562℃, 2 h)

    图  8  树脂热解后CFRP筋材极限拉伸破断

    Figure  8.  Ultimate tensile fracture of CFRP tendons after resin pyrolysis

    图  9  刷有阻燃防火涂层的CFRP索股

    Figure  9.  CFRP cable strand coated with fire retardant coating

    图  10  阻燃防火涂层遇火焰发泡

    Figure  10.  Fire retardant coating foams when expose to fire

    图  11  无阻燃防火涂层聚乙烯(PE)燃烧

    Figure  11.  Combustion of polyethylene (PE) sheath without fire retardant coating

    图  12  2 mm厚阻燃防火涂层温度-时间曲线

    Figure  12.  Temperature-time curve of 2 mm thickness fire retardant coating

    图  13  CFRP索股测温位置

    Figure  13.  Temperature measurement position of CFRP cable strand

    图  14  CFRP索股不同位置处温度-时间曲线

    Figure  14.  Temperature-time curves at different positions of CFRP cable strand

    图  15  不同厚度阻燃防火涂层的温度-时间曲线

    Figure  15.  Temperature-time curves of fire retardant coating with different thickness

    图  16  2 mm厚度阻燃防火涂层的CFRP索股膨胀发泡过程

    Figure  16.  Intumescent process of CFRP cable strand coated with 2 mm thickness fire retardant coating

    表  1  不同防护类型下CFRP筋材温度及持荷性能

    Table  1.   Temperature and load carrying capacity of CFRP tendons under different protection types

    Protection
    type
    Protection thickness/mmBurning time/minCFRP tendons temperature/℃Stress level/MPaTest resultResident strength/MPa
    2510001170Resin pyrolysis,
    tendon tensile fracture
    Ceramic fiber cloth451205621170Resin pyrolysis,
    tendon is not fracture
    1646
    Asbestos451206351170Resin pyrolysis,
    tendon is not fracture
    1249
    Asbestos601201701170The tendon is not damaged3121
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出版历程
  • 收稿日期:  2021-07-14
  • 修回日期:  2021-08-24
  • 录用日期:  2021-08-24
  • 网络出版日期:  2021-09-09
  • 刊出日期:  2022-08-31

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