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作者:

Deng Zong-cai (Deng Zong-cai.) (学者:邓宗才) | Xiao Rui (Xiao Rui.)

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摘要:

In order to research the strengthening effects of aramid fiber reinforced polymer (AFRP) sheets on the flexural performance of corroded reinforced concrete (RC) beams, the static and fatigue performance of corroded RC beams strengthened with non-prestressed AFRP sheets under different degrees of corrosion (minor reinforcement mass loss is 2 0%, medium reinforcement mass loss is 6 0%) have been researched experimentally in this paper, to compare with that of the control beams (un-strengthened and un-corroded) and un-strengthened corroded beams, and additionally compare with fatigue performance of those medium corroded RC beams strengthened with prestressed AFRP sheets with permanent anchors The results show that, (1) compared with un-strengthened corroded beams under the same degrees of corrosion, the cracking, yield and ultimate monotonic loads of the minor corroded RC beam strengthened with non-prestressed AFRP sheets is respectively increased by 20%, 27% and 60%, whereas for the medium corroded RC beam strengthened with non-prestressed AFRP sheets increased by 15%, 36% and 83% respectively The ultimate deflection of the medium corroded beam strengthened with non-prestressed AFRP sheets is 166% larger than that of the corroded un-strengthened beam under the monotonic load (2) The fatigue life of the non-prestressed AFRP strengthened medium corroded beam is 10 4 times more than that of the un-strengthened corroded beam, but lower than that of the unstrengthened-uncorroded ( virgin) beam (3) Fatigue experiments of the beams strengthened with prestressed AFRP sheets and with those non-prestressed AFRP sheets show that the fatigue life of the retrofit RC beams increase with increasing prestress level of AFRP sheets (4) The use of AFRP sheets for strengthening corroded RC beams is an efficient technique that can maintain the structural Integrity and enhance the structural behavior of such beams

关键词:

corrosion fatigue flexural performance prestressed AFRP sheets reinforced concrete beam

作者机构:

  • [ 1 ] [Deng Zong-cai]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Xiao Rui]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China

通讯作者信息:

  • 邓宗才

    [Deng Zong-cai]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China

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来源 :

CHINA OCEAN ENGINEERING

ISSN: 0890-5487

年份: 2010

期: 3

卷: 24

页码: 539-552

1 . 6 0 0

JCR@2022

ESI学科: ENGINEERING;

JCR分区:4

中科院分区:4

被引次数:

WoS核心集被引频次: 2

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