Memorias de investigación
Communications at congresses:
Ductility and redistribution of loads for reinforced concrete structures with steel fibers
Year:2019
Research Areas
  • Civil engineering and architecture
Information
Abstract
This paper analyzes the possibility of redistributing stresses in reinforced concrete structures with steel fibers (SFRC) in comparison with conventional concrete structures (CC). Instruction EHE 08 allows during the structural analysis to perform a limited redistribution of the loads calculated in elastic and linear regime that satisfies the equilibrium conditions and always linked to ductility conditions of the critical sections that guarantee the necessary deformations for the laws of solicitations adopted after redistribution. The level of redistribution allowed by Instruction EHE 08 depends on the relationship between the depth of the neutral fiber and the useful edge of the section. This magnitude is closely related to the plastic turning capacity of the section. In a CC the plastic turning capacity is conditioned by the ultimate deformation of the concrete, 3.5 ?, or by the ultimate deformation of the steel 10 ?. In the vast majority of occasions the ultimate deformation of the concrete is the one that fixes the plastic turning capacity, since the deformation of the steel is reached before that of the concrete for relations x /d?0.29, a value that is rarely reached in the practice. In SFRC the ultimate deformation of the concrete is much higher than 3.5 ?, so the turning capacity is also. This means that with the same depth of neutral fiber, the turning capacity of an EHRFA is higher than that of an CC.
International
Si
Congress
IV International Conference on Technological Innovation in Builiding. CITE 2019
960
Place
Universidad Politécnica de Madrid
Reviewers
Si
ISBN/ISSN
978-84-16397-88-4
Start Date
06/03/2019
End Date
08/03/2019
From page
268
To page
269
Libro de Actas CITE 2019
Participants
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Patología de estructuras, protecciones colectivas y medios auxiliares de edificación.
  • Departamento: Tecnología de la Edificación
  • Departamento: Construcciones Arquitectónicas y su Control