Maximum Bending Moment and Ductility of R/HPFRCC Beams

Title: Maximum Bending Moment and Ductility of R/HPFRCC Beams
Author(s): Alessandro P. Fantilli, Hirozo Mihashi, Paolo Vallini
Paper category : conference
Book title: International RILEM Workshop on High Performance Fiber Reinforced Cementitious Composites in Structural Applications
Editor(s): G. Fischer and V. C. Li
Print-ISBN: 2-912143-93-4
e-ISBN: 2912143942
Publisher: RILEM Publications SARL
Publication year: 2006
Pages: 303 - 311
Total Pages: 9
Nb references: 11
Language: English

Abstract: The strain of high performance fiber reinforced cementitious composites (HPFRCC) at maximum tensile stress is higher than the steel strain at yielding. For this reason, in reinforced HPFRCC (R/HPFRCC) structures strain incompatibility between rebars and cement-based composite does not appear. As a consequence, the maximum bending moment of R/HPFRCC beams can be easily evaluated by means of the uncracked formula (or Stage I formula). But, unlike the bearing capacity, in the evaluation of deformability, strain localization has to be taken into account during failure. In order to highlight the importance of localizations, numerical results and experimental measurements are compared in the present paper. This can be done by introducing a mechanical model for the evaluation of the moment-curvature relationship, and by referring to a test on a R/HPFRCC beam in three point bending. If strain localization in the compressed HPFRCC is correctly modelled, a good agreement between the results of the proposed model and the experimental data is found.

Online publication: 2005-05-15
Classification: HPFRCC Design Assumptions
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143942.033