Conference proceedings article
Structural Behavior of Ultra High Performance Concrete Reinforced with Steel Fibers and Rebars
Publication Details
Authors: | Fehling, E.; Leutbecher, T.; Stürwald, S. |
Editor: | Precast/Prestressed Concrete Institute, Chicago |
Place: | Washington D.C. |
Publication year: | 2010 |
Pages range : | TBD |
Book title: | 2010 fib Congress and PCI Convention Bridge Conference Proceedings |
Abstract
Ultra High Performance Concrete (UHPC) not only offers superior compressive strength up to 200 N/mm² but also provides more durability and ductility if fiber reinforcement is added. In order to carry tensile loads of structural members very effectively, fibers can be combined with conventional bar reinforcement. Thereby, the structural and deformation behavior is affected significantly. Based on the results of bond tests, the behavior of UHPC structural members with a combined reinforcement was investigated under tensile, biaxial and flexural loading. For tensile loading, an experimentally verified mechanical model based on equilibrium and compatibility is proposed. It includes the integral load-deformation-behavior as well as the development of the crack pattern. Test series under biaxial compression-tension loading showed a reduced compressive strength depending on the fiber reinforcement and on the transverse tensile strain respectively on the crack width. A proposal for the reduction of compressive strength could be developed.
Ultra High Performance Concrete (UHPC) not only offers superior compressive strength up to 200 N/mm² but also provides more durability and ductility if fiber reinforcement is added. In order to carry tensile loads of structural members very effectively, fibers can be combined with conventional bar reinforcement. Thereby, the structural and deformation behavior is affected significantly. Based on the results of bond tests, the behavior of UHPC structural members with a combined reinforcement was investigated under tensile, biaxial and flexural loading. For tensile loading, an experimentally verified mechanical model based on equilibrium and compatibility is proposed. It includes the integral load-deformation-behavior as well as the development of the crack pattern. Test series under biaxial compression-tension loading showed a reduced compressive strength depending on the fiber reinforcement and on the transverse tensile strain respectively on the crack width. A proposal for the reduction of compressive strength could be developed.
Keywords
Bond, Fibers, Rebars, Structural Behavior, UHPC
