Research notes : shear capacity of corrosion-damaged RC beams.
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Research notes : shear capacity of corrosion-damaged RC beams.

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  • English
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    • Alternative Title:
      Shear capacity of corrosion-damaged RC beams.
    • Corporate Creators:
      Oregon. Dept. of Transportation. Research Unit
    • Subject/TRT Terms:
    • Publication/ Report Number:
      RSN 04-04
    • Resource Type:
      Tech Report
    • Geographical Coverage:
      Oregon
    • Corporate Publisher:
      Oregon. Dept. of Transportation. Research Unit
    • Abstract:
      Bridges on Oregon’s coast must withstand a corrosive marine environment. Concrete in reinforced concrete structures offers temporary protection to the reinforcing steel against the environment; but eventually the embedded steel succumbs to the inexorable nature of carbon steel to rust. A thin layer of rust is enough to spall the concrete cover, exposing the underlying steel directly to the corrosive environment.

      Experience has shown that the vertically oriented steel bars (shear stirrups), which are in place to provide shear capacity to a beam, are the most prone to degradation. Horizontal steel bars, which add flexural capacity to the beam, also corrode, but the bars are thicker and placed in multiple layers through the width of the beam. Corrosion damage can be so severe that some shear stirrups are completely severed.

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