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Adhesion at High Temperature of FRP Bars Straight or Bent at the end of Concrete Slabs

机译：FRP筋在混凝土板末端直或弯曲时的高温附着力

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摘要

Confidence in the use of Fiber Reinforced Polymer (FRP) for Reinforced Concrete (RC) members in multi-story buildings, parking garages, and industrial structures is poor due to lack of provisions and calculation models taking account of fire condition. In the past, to contribute to refining existing codes for the design of FRP-RC structures, authors tested six concrete slabs reinforced with Glass FRP (GFRP) bars characterized by different values of concrete cover and anchoring length in fire condition. Recently, further three fire tests were carried out on concrete slabs reinforced with GFRP bars bent at the ends. The anchoring of the FRP bars in the zone of slab not directly exposed to fire at the end of the members revealed essential to ensures slab resistance, once in the fire exposed zone of slab the glass transition temperature was attained and the resin softening reduced the adhesion at the FRP-concrete interface.
机译：由于缺乏规定和考虑火灾条件的计算模型，因此对于多层建筑物，停车场和工业结构中的钢筋混凝土（RC）构件使用纤维增强聚合物（FRP）的信心很差。过去，为完善现有的FRP-RC结构设计规范，作者测试了六块玻璃纤维增​​强玻璃纤维增​​强筋（GFRP）钢筋混凝土楼板，其特征是在火灾条件下混凝土覆盖率和锚固长度不同。最近，又对两端弯曲的GFRP钢筋混凝土板进行了三项防火测试。 FRP筋锚固在未直接暴露于火的板坯区域中，这对于确保板坯的抵抗力至关重要，一旦在板坯的受火区域，玻璃化转变温度就达到了，树脂软化降低了附着力在FRP混凝土界面上。

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  • 来源
    《Journal of structural fire engineering》 |2013年第2期|71-85|共15页
  • 作者

    Emidio Nigro; Giuseppe Cefarelli; Antonio Bilotta; Gaetano Manfredi; Edoardo Cosenza;

  • 作者单位

    Department of Structural Engineering, University of Naples Federico II Via Claudio n. 21, Napoli (postal code: 80125), ITALY;

    Department of Structural Engineering, University of Naples Federico II Via Claudio n. 21, Napoli (postal code: 80125), ITALY;

    Department of Structural Engineering, University of Naples Federico II Via Claudio n. 21, Napoli (postal code: 80125), ITALY;

    Department of Structural Engineering, University of Naples Federico II Via Claudio n. 21, Napoli (postal code: 80125), ITALY;

    Department of Structural Engineering, University of Naples Federico II Via Claudio n. 21, Napoli (postal code: 80125), ITALY;

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  • 正文语种 eng
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  • 关键词

    FRP; Fire test; High temperatures; Anchorage; bars;

    机译：玻璃钢;防火测试;高温;锚地;酒吧;

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