复合材料科学与工程 ›› 2022, Vol. 0 ›› Issue (10): 33-37.DOI: 10.19936/j.cnki.2096-8000.20221028.005

• 应用研究 • 上一篇    下一篇

大直径GFRP筋与混凝土黏结性能现场足尺试验研究

王凤姣1, 白晓宇1*, 陈吉光2, 于龙涛3, 李明4, 朱磊5   

  1. 1.青岛理工大学 土木工程学院,青岛266520;
    2.中建八局第二建设有限公司,济南250014;
    3.中国建筑第五工程局有限公司,长沙410004;
    4.深圳海川新材料科技股份有限公司,深圳518040;
    5.济南市市政工程设计研究院(集团)有限责任公司,济南250003
  • 收稿日期:2022-05-16 出版日期:2022-10-28 发布日期:2022-11-01
  • 通讯作者: 白晓宇(1984-),男,博士(后),副教授,博士生导师,主要从事FRP材料在岩土工程中应用方面的研究,baixiaoyu538@163.com。
  • 作者简介:王凤姣(1997-),女,硕士研究生,主要从事城市地下工程方面的研究。
  • 基金资助:
    山东省自然科学基金重点项目(ZR2020KE009);国家自然科学基金项目(51708316);中国博士后科学基金面上项目(2018M632641)

Field full-scale experimental study on the bonding performance of large diameter GFRP bars and concrete

WANG Feng-jiao1, BAI Xiao-yu1*, CHEN Ji-guang2, YU Long-tao3, LI Ming4, ZHU Lei5   

  1. 1. School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, China;
    2. The Second Construction Limited Company of China Construction Eighth Engineering Division, Jinan 250014, China;
    3. The Fifth Bureau of China State Construction Engineering Corporation, Changsha 410004, China;
    4. Shenzhen Ocean Power New Material Technology Co., Ltd., Shenzhen 518040, China;
    5. Jinan Municipal Engineering Design and Research Institute (Group) Co., Ltd., Jinan 250003, China
  • Received:2022-05-16 Online:2022-10-28 Published:2022-11-01

摘要: 为研究大直径GFRP筋与混凝土的黏结性能,利用现场开挖沟槽作为地模然后浇筑混凝土的试验方式,进行GFRP筋与混凝土的极限抗拔试验,明确GFRP筋极限抗拔承载力及黏结-滑移的影响因素。结果表明:①GFRP筋的破坏形式主要以剪切滑移破坏为主。②GFRP筋的极限抗拔承载力随竖向锚固长度和直径的增加而增大,弯折处理可有效降低GFRP筋与混凝土的相对滑移,且竖向锚固长度越长,GFRP筋的滑移量越小;GFRP筋的滑移量随弯折长度增加而减小。③GFRP筋弯折处理会削弱其极限承载力,结果显示,通过现有弯折工艺来提升GFRP筋与混凝土的极限抗拔承载力的效果有限。

关键词: GFRP筋, 荷载-滑移, 极限抗拔承载力, 黏结强度, 弯折处理

Abstract: In order to study the adhesion performance of GFRP tendons and concrete, the field ultimate pullout test of GFRP tendons was carried out by using the test method of field trenching and grouting to clarify the adhesion performance of GFRP tendons and concrete, and to analyze the ultimate pullout bearing capacity of GFRP tendons and the factors affecting the slippage. The results show that the failure mode of GFRP anti-floating reinforcement is mainly shear slip failure. The ultimate pullout bearing capacity of GFRP bars increases with the increase of vertical anchorage length and anchor bar diameter. The bending treatment can effectively reduce the anchor bar slippage, and the longer the vertical anchorage length, the smaller the slippage of GFRP bars. The slippage of GFRP bars decreases with the increase of bending length. Bending the GFRP bar will weaken its ultimate bearing capacity, and the method of increasing its ultimate bearing capacity through the current bending process is less effective.

Key words: GFRP bar, bond-slip, ultimate pull-out capacity, bond strength, bending

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