Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Flexural-strengthening efficiency of cfrp sheets for unbonded post-tensioned concrete T-beams

    266107.pdf (1.000Mb)
    Access Status
    Open access
    Authors
    Nguyen-Minh, L.
    Phan-Vu, P.
    Tran-Thanh, D.
    Phuong Thi Truong, Q.
    Pham, Thong
    Ngo-Huu, C.
    Rovnák, M.
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Nguyen-Minh, L. and Phan-Vu, P. and Tran-Thanh, D. and Phuong Thi Truong, Q. and Pham, T. and Ngo-Huu, C. and Rovnák, M. 2018. Flexural-strengthening efficiency of cfrp sheets for unbonded post-tensioned concrete T-beams. Engineering Structures. 166: pp. 1-15.
    Source Title
    Engineering Structures
    DOI
    10.1016/j.engstruct.2018.03.065
    ISSN
    0141-0296
    School
    School of Civil and Mechanical Engineering (CME)
    URI
    http://hdl.handle.net/20.500.11937/67665
    Collection
    • Curtin Research Publications
    Abstract

    There has been a limited number of studies about the flexural behavior of unbonded post-tensioned concrete (UPC) beams strengthened with carbon fibre reinforced polymer (CFRP) and these studies have not systematically examined the effect of CFRP sheets on the tendon strain as well as the strengthening efficiency. Moreover, current design guides for the FRP strengthening techniques have not provided any design procedure for UPC structures. This study, thus, investigates the influence of CFRP sheet ratio on the flexural behavior of CFRP-strengthened UPC T-beams and quantifies its effect upon tendon behavior in this kind of UPC beams. The testing program consisted of nine large-scale UPC T-beams strengthened by different layers of CFRP sheets with or without CFRP U-wrapped anchors. The experimental results have shown that the use of CFRP sheets and CFRP U-wrapped anchors significantly affected the tendon strain. The FRP reinforcement ratio governed the flexural capacity, the crack width, the mid-span displacement, and the ductility of the beams in which the strengthening efficiency reduces with the increased number of CFRP layers. The configuration of the CFRP U-wrapped anchors affected the strain of the CFRP sheets, the failure mode and thus the beam behavior. In addition, semi-empirical equations were proposed to estimate the actual strain of unbonded tendons in which the effect of the CFRP sheets and CFRP U-wrapped anchors have been taken into consideration. The proposed equations, which are simple to use, yield reliable predictions with a small variation.

    Related items

    Showing items related by title, author, creator and subject.

    • Shear capacity of unbonded post-tensioned concrete T-beams strengthened with CFRP and GFRP U-wraps
      Nguyen-Minh, L.; Vo-Le, D.; Tran-Thanh, D.; Pham, Thong; Ho-Huu, C.; Rovnák, M. (2018)
      Existing codes and design guidelines have not mentioned a procedure to calculate the shear resistance of unbonded post-tensioned concrete beams strengthened with fiber reinforced polymer (FRP) sheets. Up to date, the ...
    • RC beams strengthened with longitudinal and U-wrap FRP
      Pham, Thong; Hao, Hong (2016)
      This study investigates the strengthening efficiency of modified reinforced concrete (RC) beams strengthened with longitudinal and U-wrap FRP. Two types of sections were studied, namely normal rectangular and modified ...
    • Behavior of fiber-reinforced polymer-strengthened reinforced concrete beams under static and impact loads
      Pham, Thong; Hao, Hong (2017)
      This study investigates the behavior of fiber-reinforced polymer-strengthened reinforced concrete beams under static and impact loads. The experimental program includes six beams tested in static loads and seven beams ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.