Reinforcement to Induce Ductile Behavior in an Ultra High Performance Fiber Reinforced Concrete Beam

Abstract:

The purpose of this study was to reduce production costs for UHPFRC members by using a bundle of longitudinal reinforcement bars as a substitute for steel fiber. Experiments on the ductile behavior of Ultra High Performance Concrete (UHPC) rectangular beams with a combination of steel fiber and longitudinal reinforcement bars were performed.The volume fractions of steel fiber were 0%, 0.7%, 1%, 1.5%, 2%, and the reinforcement ratios of longitudinal reinforcement bars that promoted ductile behavior were 0.0036, 0.016, 0.029 and 0.036.Fifteen UHPC beams were made with the combination of these test factors. Both the steel fiber and the longitudinal reinforcement bars had the effect of induciing ductile behavior for UHPC structural members. The load-deflection relationship, the concrete stress variation and the crack pattern indicated the usefulness of the bundle of longitudinal bars that have a small diameter with close arrangement.

• Periodical: Key Engineering Materials (Volumes 629-630)
• Pages: 85-90
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.629-630.85
• Online since: October 2014
• Authors: Sang Mook Han*, Xiang Guo Wu
• Keywords: Ductile Behavior, Reinforcement Bar, Steel Fiber, Ultra High Performance Concrete

References

[1] Chan, S.Y.N., Feng, N.Q., Tsang, M.K.C. "Durability of high strength concrete incorporating carrier fluidifying agent, Magazine of Concrete Research, Vol. 52, No. 4, pp.235-242, (2000).

DOI: 10.1680/macr.2000.52.4.235

[2] Han, Sang Mook, Guo Qing Yong, Flexural Experiment of Over Reinforced Prestressed High Performance Fiber Reinforced Concrete Girder., Journal of The Korean Society of Hazard Mitigation, Vol. 11, No. 5, p.91~97, (2011).

DOI: 10.9798/kosham.2011.11.5.091

[3] Han Sang-Mook, Guo Qing-Yong, The Moment Relationship of the Rectangular Ultra High Performance Fiber Reinforced Concrete Beam, Journal of The Korean Society of Hazard Mitigation, Vol. 11, No. 3, p.9, (2011).

DOI: 10.9798/kosham.2011.11.3.009

[4] Ekkehard Fehling, Kai Bunje, Michael Schmidt, Walter Schreiber, "Ultra High Performance Composites Bridge across the River Fulda in Kassel, Proceedings of the International Symposium on Ultra High Performance Concrete, p.69~75, (2004).

DOI: 10.2749/222137807796158165