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 language | English (US) |
|---|---|
| Pages (from-to) | 461-469 |
| Number of pages | 9 |
| Journal | ACI Materials Journal |
| Volume | 106 |
| Issue number | 5 |
| State | Published - 2009 |
Keywords
- Composite concrete flexural members
- Design
- Fiber-reinforced concrete
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- General Materials Science