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Analytical and Numerical Models of Steel I-Section Beam-Columns Strengthened with Bonded Prestressed FRP Laminates

Autor(en):

Medium: Fachartikel
Sprache(n): Englisch
Veröffentlicht in: Electronic Journal of Structural Engineering, , v. 19
Seite(n): 1-13
DOI: 10.56748/ejse.19230
Abstrakt:

Fibre Reinforced Polymer (FRP) laminate are currently used in strengthening steel structures having a significant favorable effect on the member capacity. Researches have been focused on FRP strength-ened beams or columns; thus, I-section beam-columns strengthened with prestressed bonded FRP laminate are scrutinized. Steel yielding, laminate rupture and/or laminate interfacial debonding common failure modes af-fecting the strengthened beam-columns capacity: debonding commonly leads to a premature failure. Prestress-ing the FRP laminate may delay this premature failure. Equations are analytically developed to evaluate the interfacial shear and normal stresses between the laminate and the steel; hence, the maximum stresses at debond-ing are evaluated. Thus, the capacity of a beam-column with prestressed FRP laminate is analytically estimated. A nonlinear numerical model is then developed for these beam-columns. The model is verified against exper-imental results available from literature. Then, a parametric study is conducted using the numerical model. Based on these results, a regression analysis is performed and the capacity of beam-columns with prestressed FRP laminate is numerically estimated considering steel yielding or FRP laminate rupture. Results of the nu-merical and analytical models lead to a proposal for evaluating the FRP strengthened beam-column capacity and the need for prestressing the FRP laminate.

Structurae kann Ihnen derzeit diese Veröffentlichung nicht im Volltext zur Verfügung stellen. Der Volltext ist beim Verlag erhältlich über die DOI: 10.56748/ejse.19230.
  • Über diese
    Datenseite
  • Reference-ID
    10778724
  • Veröffentlicht am:
    12.05.2024
  • Geändert am:
    12.05.2024
 
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