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作者:

Bai, Yu-Lei (Bai, Yu-Lei.) | Niu, Wan-Qing (Niu, Wan-Qing.) | Mei, Shi-Jie (Mei, Shi-Jie.) | Gao, Wan-Yang (Gao, Wan-Yang.)

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EI Scopus SCIE

摘要:

In this study, a comprehensive experimental and theoretical work was conducted on the bending performance of hybrid carbon-polyethylene terephthalate (C-PET) fiber-reinforced polymer (FRP) strengthened reinforced concrete (RC) beams with U-strip anchorages. Eleven RC beams were tested under a four-point bending load to investigate the influence of stacking sequence and U-strip anchorages. The bending performance of strengthened beams was carefully examined and discussed with regard to failure mode, flexural strength, ductility coefficient, and FRP strain development. The hybrid strengthened beams with U-strip anchorages exhibited 10.54 %-21.97 % higher flexural strength and 4.30 %-206.27 % higher ductility factors than the corresponding strengthened beams without U-strip anchorages. In addition, a theoretical analysis model with high accuracy was proposed to simulate the load-deflection curves of the strengthened beams based on the section analysis and plastic hinge model. Finally, this paper evaluated the accuracy of design guidelines (including GB 50608, ACI 440.2 R, and CNR DT 200 R1) in calculating the load-bearing capacities of strengthened beams.

关键词:

Flexural strengthening PET FRP RC beams U -strip anchorage Hybrid FRP laminates

作者机构:

  • [ 1 ] [Bai, Yu-Lei]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100022, Peoples R China
  • [ 2 ] [Mei, Shi-Jie]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100022, Peoples R China
  • [ 3 ] [Niu, Wan-Qing]Beijing Gen Municipal Engn Design & Res Inst Co Lt, Beijing 100082, Peoples R China
  • [ 4 ] [Gao, Wan-Yang]Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China

通讯作者信息:

  • [Mei, Shi-Jie]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100022, Peoples R China

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来源 :

ENGINEERING STRUCTURES

ISSN: 0141-0296

年份: 2024

卷: 322

5 . 5 0 0

JCR@2022

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