Closed-Form Solutions for Flexural Response of Fiber-Reinforced Concrete Beams

A constitutive law for fiber-reinforced concrete materials consisting of an elastic perfectly plastic model for compression and an elastic-constant postpeak response for tension is presented. The material parameters are described by using Young's modulus and first cracking strain in addition to 4 nondimensional parameters to define postpeak tensile strength, compressive strength, and ultimate strain levels in tension and compression. The closed-form solutions for moment-curvature response are derived and normalized with respect to their values at the cracking moment. Further simplification of the moment-curvature response to a bilinear model, and the use of the moment-area method results in another set of closed-form solutions to calculate midspan deflection of a beam under 3- and 4-point bending tests. Model simulations are correlated with a variety of test results available in literature. The simulation of a 3- and 4-point bending test reveals that the direct use of uniaxial tensile response underpredicts the flexural response.

  • Availability:
  • Supplemental Notes:
    • Abstract reprinted with permission from ASCE
  • Authors:
    • Soranakom, C
    • Mobasher, B
  • Publication Date: 2007-8

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01055260
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 21 2007 9:56PM