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Experimental Study on the Flexural Properties of FRP-Reinforced Super-Span Concrete T-Beam after Service

Author

Listed:
  • Dongxu Hou

    (Department of Construction Engineering, Shenyang University, Shenyang 110044, China)

  • Tieming Hu

    (Department of Construction Engineering, Shenyang University, Shenyang 110044, China)

  • Guanhua Zhang

    (Liaoning Transportation Planning and Design Institute Co. Ltd., Shenyang 110057, China)

  • Boqi Chu

    (Department of Construction Engineering, Shenyang University, Shenyang 110044, China)

  • Jing Zhu

    (Liaoning Transportation Planning and Design Institute Co. Ltd., Shenyang 110057, China)

  • Xingdong Yang

    (Shenyang Construction Quality Testing Centre Co. Ltd., Shenyang 110004, China)

Abstract

Super-span (20 m) non-prestressed T-section reinforced concrete beams have been in service for more than 30 years and are common in Chinese highway bridges. However, the actual performance of these super-span T-section reinforced concrete (RC) beams that have been reinforced with FRP, including their process of failure from a service state to a failure state, has not been determined. In this study, original RC T-beams, with a 20 m span and retrofitted with FRP, were taken from a highway bridge. Their flexural performance was detected via experiments in a laboratory. The experiments revealed that the sectional strain distribution is more non-uniform. The mid-span ribs clearly play a role in strengthening the section and the bearing reservation was studied based on a subsequent sectional analysis. It became clear that the load-bearing reservation of an old super-span T-beam changes during the entire life of the specimen; not only because of the depression of the resistant capacity and the reinforced measure, but also due to the updates to load codes.

Suggested Citation

  • Dongxu Hou & Tieming Hu & Guanhua Zhang & Boqi Chu & Jing Zhu & Xingdong Yang, 2023. "Experimental Study on the Flexural Properties of FRP-Reinforced Super-Span Concrete T-Beam after Service," Sustainability, MDPI, vol. 15(15), pages 1-18, August.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:15:p:11903-:d:1209223
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