Abstract

A set of closed form equations for flexural design of fiber-reinforced concrete are presented. These equations are based on simplified tensile and compressive constitutive response and may be used in a limit state approach or serviceability-based criterion that limits the effective tensile strain capacity. The equations allow generation of flexural moment-curvature response of a rectangular beam section for use in structural analysis calculations in addition to design charts for strain softening fiber-reinforced concrete. To prevent sudden failure after flexural cracking and to control crack width, equations for minimum post-crack tensile strength are also proposed. The analytical tensile strain equations proposed for serviceability limit the average crack width of structural members. In addition, the bilinear moment-curvature model is used in conjunction with geometrical relationship between curvature and deflection to determine short-term deflections of structural members. An example of a one-way slab demonstrates the calculation steps.

Original languageEnglish (US)
Pages (from-to)461-469
Number of pages9
JournalACI Materials Journal
Volume106
Issue number5
StatePublished - 2009

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Reinforced concrete
Structural members
Tensile strain
Cracks
Fibers
Forms (concrete)
Structural analysis
Tensile strength

Keywords

  • Composite concrete flexural members
  • Design
  • Fiber-reinforced concrete

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)
  • Civil and Structural Engineering

Cite this

Flexural design of fiber-reinforced concrete. / Soranakom, Chote; Mobasher, Barzin.

In: ACI Materials Journal, Vol. 106, No. 5, 2009, p. 461-469.

Research output: Contribution to journalArticle

Soranakom, C & Mobasher, B 2009, 'Flexural design of fiber-reinforced concrete', ACI Materials Journal, vol. 106, no. 5, pp. 461-469.
Soranakom, Chote ; Mobasher, Barzin. / Flexural design of fiber-reinforced concrete. In: ACI Materials Journal. 2009 ; Vol. 106, No. 5. pp. 461-469.
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