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Failure mechanisms of CFRP-wrapped protective concrete arches under static and blast loadings: Experimental research

机译：爆炸荷载作用下CFRP包裹防护混凝土拱的破坏机理：试验研究

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摘要

In this research, failure mechanisms of carbon fiber reinforced polymer (CFRP) wrapped protective arches under static and blast loadings were investigated through experiments. Adopting bonding and partially-wrapping scheme, the plain concrete (PLC) arch is strengthened and its load carrying ability achieves the level of steel bar reinforced concrete (RC) arch in the static loading experiment. Adopting bonding and fully-wrapping scheme, it's akin to apply hollow CFRP tubular arch to reinforce plain PLC arches. Load carrying capacity of the CFRP composite arch achieves twice as much as that of the RC arch and the composite arch fails in a shear mode. Subjected to explosive loading, anti-blast ability of the CFRP tubular concrete arch is much better than the PLC arch. Critical scaled distance to prevent the arch from dynamic broken is considerably reduced. According to the research, it is confirmed that using the composite technique an efficient composite protective arch structure can be constructed and steel reinforcements can be entirely replaced by CFRP in some cases, such as coastal engineering and anti-blast structures.
机译：在这项研究中，通过实验研究了碳纤维增强聚合物（CFRP）包裹的保护拱在静态和爆炸载荷下的破坏机理。采用粘结和部分包裹方案，对普通混凝土拱进行了加固，在静载试验中其承载能力达到了钢筋混凝土拱的水平。采用粘结和完全包裹方案，类似于使用空心CFRP管拱来加固普通PLC拱。 CFRP组合拱的承载能力是RC拱的两倍，并且复合拱在剪切模式下会失效。在爆炸载荷作用下，CFRP管状混凝土拱的抗爆炸能力比PLC拱要好得多。防止弓动态断裂的临界比例距离已大大减少。根据研究，可以肯定的是，使用复合技术可以构建有效的复合保护拱形结构，并且在某些情况下，例如海岸工程和抗爆结构，可以用CFRP完全替代钢筋。

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  • 来源
    《Composite Structures》 |2018年第8期|1-10|共10页
  • 作者

    Wang Peng; Chen Hailong; Zhou Jiannan; Zhou Yinzhi; Wang Bo; Jiang Meirong; Jin Fengnian; Fan Hualin;

  • 作者单位

    PLA Univ Sci & Technol, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Jiangsu, Peoples R China;

    PLA Univ Sci & Technol, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Jiangsu, Peoples R China;

    PLA Univ Sci & Technol, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Jiangsu, Peoples R China;

    PLA Univ Sci & Technol, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Jiangsu, Peoples R China;

    PLA Univ Sci & Technol, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Jiangsu, Peoples R China;

    PLA Univ Sci & Technol, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Jiangsu, Peoples R China;

    PLA Univ Sci & Technol, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Jiangsu, Peoples R China;

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

    Composites; Concrete; Impact fracture; Civil engineering structures;

    机译：复合材料;混凝土;冲击断裂;土木工程结构;

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