Shear analysis of concrete with brittle reinforcement

T. Stratford, C. Burgoyne

Research output: Contribution to journalArticlepeer-review


The design of steel-reinforced concrete relies on lower-bound plasticity theory, which allows an equilibrium-state to be postulated without considering compatibility. This is of particular benefit in shear design, due to the complexity of shear-transfer, where simplified models such as the truss analogy are used. Lower-bound plasticity theory, however, relies on stress- redistribution. If brittle reinforcement [such as fiber-reinforced-plastic (FRP)] is used in concrete, lower-bound plasticity theory cannot be applied. This paper studies how compatibility, equilibrium, and the material constitutive laws can be combined to establish the actual conditions within an FRP-reinforced beam subjected to shear. A crack-based analysis is proposed to model shear failure in a beam with brittle reinforcement. The analysis is used to illustrate the importance of satisfying compatibility requirements, and the results are contrasted with the current shear design proposals for FRP-reinforced concrete.
Original languageEnglish
Pages (from-to)323-330
Number of pages8
JournalJournal of Composites for Construction
Issue number4
Publication statusPublished - 1 Nov 2003


  • concrete
  • composite materials
  • brittle fracture
  • construction industry
  • failure (mechanical)
  • shear modulus
  • civil engineering

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