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Blast responses of concrete beams reinforced with GFRP bars: Experimental research and equivalent static analysis

机译：GFRP筋加固混凝土梁的爆炸响应：试验研究和等效静力分析

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摘要

The glass fiber reinforced polymer (GRFP) bars have advantages in corrosion resistance and high load bearing capacity. They can be used as reinforcements in concrete protective structures to replace the steel bars. In this paper, the GRFP bar reinforced concrete beams (GRCBs) were designed, casted and tested. As a reference, the steel bar reinforced concrete beams (SRCBs) having the same flexural rigidity with the GRCBs were also designed, casted and tested. Under close-in explosions, the GRCBs have smaller displacement than the SRCBs, because the GFRP bars are still in elastic state while the steel bars enter into plastic deformation. Cracks, spalling and cratering are the main damage modes of the concrete beams. Through the quasi-static four-point-bending experiments, the residual load capacity of each beam has been evaluated, which quantitatively reveals the damage degree of the exploded concrete beams. In current research the explosion produces negligible damage to the GRCBs, while the load capacity the SRCBs reduces at a level of 28% at the most. The research proves that the GRCB has greater blast-resistance.
机译：玻璃纤维增​​强聚合物（GRFP）钢筋在耐腐蚀和高承载能力方面具有优势。它们可以用作混凝土保护结构中的钢筋来代替钢筋。在本文中，设计，浇筑和测试了GRFP钢筋混凝土梁（GRCB）。作为参考，还设计，浇铸和测试了具有与GRCB相同的抗弯刚度的钢筋混凝土梁（SRCB）。在近距离爆炸中，GRCB的位移比SRCB小，这是因为GFRP钢筋仍处于弹性状态，而钢筋进入塑性变形。裂缝，剥落和缩孔是混凝土梁的主要破坏方式。通过准静态四点弯曲试验，评估了每根梁的残余承载能力，定量地揭示了爆炸混凝土梁的损伤程度。在当前的研究中，爆炸对GRCB的破坏微不足道，而SRCB的承载能力最大降低了28％。研究证明，GRCB具有更高的抗爆炸性。

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  • 来源
    《Composite Structures》 |2019年第10期|111271.1-111271.13|共13页
  • 作者

    Liu Sanfeng; Zhou Yinzhi; Zhou Jiannan; Zhang Bei; Jin Fengnian; Zheng Qing; Fan Hualin;

  • 作者单位

    Army Engn Univ PLA State Key Lab Disaster Prevent & Mitigat Explos & Nanjing 210007 Jiangsu Peoples R China;

    Army Engn Univ PLA State Key Lab Disaster Prevent & Mitigat Explos & Nanjing 210007 Jiangsu Peoples R China|PLA Inst Def Engn AMS Luoyang 471023 Peoples R China;

    Nanjing Univ Aeronaut & Astronaut Res Ctr Lightweight Struct & Intelligent Mfg State Key Lab Mech & Control Mech Struct Nanjing 210016 Jiangsu Peoples R China|Tongji Univ State Key Lab Disaster Reduct Civil Engn Shanghai 200092 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

    GFRP composite bar; Concrete beam reinforced with GFRP bars; Blast loading; Experiments; Damage;

    机译：GFRP复合筋;GFRP筋加固的混凝土梁;爆炸加载;实验;损伤;

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