Title:
Flexural Design of Fiber-Reinforced Concrete
Author(s):
Chote Soranakom and Barzin Mobasher
Publication:
Materials Journal
Volume:
106
Issue:
5
Appears on pages(s):
461-469
Keywords:
composite concrete flexural members; design; fiber-reinforced concrete.
DOI:
10.14359/51663147
Date:
9/1/2009
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.