Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/38784

TitleA model to simulate the moment-rotation and crack width of FRC members reinforced with longitudinal bars
Author(s)Barros, Joaquim A. O.
Taheri, Mahsa
Salehian, Hamidreza
KeywordsFiber reinforced concrete
Longitudinal steel bars
Moment-rotation response
Force-deflection response
Crack width
Issue date2015
PublisherElsevier
JournalEngineering Structures
Abstract(s)The present work describes a model for the determination of the moment–rotation relationship of a cross section of fiber reinforced concrete (FRC) elements that also include longitudinal bars for the flexural reinforcement (R/FRC). Since a stress–crack width relationship (σ–w)(σ–w) is used to model the post-cracking behavior of a FRC, the σ–w directly obtained from tensile tests, or derived from inverse analysis applied to the results obtained in three-point notched beam bending tests, can be adopted in this approach. For a more realistic assessment of the crack opening, a bond stress versus slip relationship is assumed to simulate the bond between longitudinal bars and surrounding FRC. To simulate the compression behavior of the FRC, a shear friction model is adopted based on the physical interpretation of the post-peak compression softening behavior registered in experimental tests. By allowing the formation of a compressive FRC wedge delimited by shear band zones, the concept of concrete crushing failure mode in beams failing in bending is reinterpreted. By using the moment–rotation relationship, an algorithm was developed to determine the force–deflection response of statically determinate R/FRC elements. The model is described in detail and its good predictive performance is demonstrated by using available experimental data. Parametric studies were executed to evidence the influence of relevant parameters of the model on the serviceability and ultimate design conditions of R/FRC elements failing in bending.
TypeArticle
URIhttp://hdl.handle.net/1822/38784
DOI10.1016/j.engstruct.2015.05.036
ISSN0141-0296
Peer-Reviewedyes
AccessOpen access
Appears in Collections:ISISE - Artigos em Revistas Internacionais

Files in This Item:
File Description SizeFormat 
IJ(ISI)_105.pdf1,22 MBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID