A parametric study on the use of strain softening/hardening FRC for RC elements...

• Author(s): Barros, Joaquim A. O. ; Taheri, Mahsa ; Salehian, Hamidreza
• Date: 2012
• Persistent ID: http://hdl.handle.net/1822/12737
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Fiber reinforced concrete; Strain softening; Strain hardening; Longitudinal steel bars; Moment-curvature response; Force-deflection response; Flexural failure; Crack width
• Document Type: Preprint
• Language: English

Description

Documento submetido para revisão pelos pares. A publicar em Materials in Civil Engineering. ISSN 0899-1561 Using a design oriented model, which was recently developed for the prediction of the moment-curvature relationship of a cross section of beams made by strain softening or strain hardening fiber reinforced concrete (FRC) and that can also include a certain percentage of longitudinal steel bars, a parametric study is carried out to evidence the effect of relevant characteristics of the post-cracking behavior of these materials in the moment-curvature and force-deflection responses of this type of structural elements. The study also analyzes the influence of the reinforcement ratio of longitudinal steel bars, r, in order to show that for a certain content of fibers the benefits of fiber reinforcement, mainly at serviceability limit state conditions, decrease with the increase of r. Adopting the formulation of Model Code 2010, the moment-crack width relationship of FRC beams reinforced with steel bars are obtained and the predictive performance of this approach is assessed by comparing analytical and experimental results.