Flexural Analysis and Design of Strain Softening Fiber-Reinforced Concrete


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Title: Flexural Analysis and Design of Strain Softening Fiber-Reinforced Concrete

Author(s): C. Soranakom and B. Mobasher

Publication: Special Publication

Volume: 272


Appears on pages(s): 173-187

Keywords: aging; AR-glass; cement composites; damage mechanics; fabric-reinforced composites; fabrics; fibers; glass fibers; laminated composites; microcracking; moment-curvature relationship; polypropylene fabrics; pultrusion; reinforced concrete; strength.

Date: 10/1/2010

Parameterized material models for strain softening fiber-reinforced concrete are used to express closed-form solutions of moment-curvature response of rectangular cross sections. By utilizing crack localization rules, one can predict flexural response of a beam. A parametric study of post crack tensile strength in the strain softening model is conducted to demonstrate general behavior of deflection softening and deflection hardening materials. Uniaxial and flexural test results of several polymeric fiber-reinforced concrete mixtures are used to demonstrate the applicability of the algorithm to predict load-deflection responses. The data are compared with the ASTM International test Method C1599, which represents the residual strength of the sample after cracking has taken place. The simulations reveal that uniaxial tensile stress-strain relationship is under-predicted using the flexural response test results.