Structural Response of Elements Combining Ultrahigh-Performance Fiber-Reinforced Concretes and Reinforced Concrete
Publication: Journal of Structural Engineering
Volume 132, Issue 11
Abstract
The use of ultrahigh-performance fiber-reinforced concretes (UHPFRC) improves the structural response and extends the durability of concrete structures. Three basic configurations for structural elements combining UHPFRC and reinforced normal strength concrete are proposed with regard to typical demands on rehabilitation projects. They fulfill a protection function and the resistance can be increased if required. The flexural response of these composite UHPFRC–concrete elements is investigated with an original analytical cross-sectional model in a parametric study: UHPFRC increase stiffness and resistance and delay the formation of localized cracks. For this, a minimum magnitude of strain-hardening of 0.2% is necessary. Additional reinforcement in the UHPFRC layer is the most efficient way to increase the bending resistance. The investigation demonstrates how to use UHPFRC and reinforcing bars best in rehabilitation of existing concrete structures.
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Acknowledgments
This project has been financially supported by the Swiss Federal Office for Education and Science (OFES) in the context of the European Project Sustainable and Advanced Materials for Road Infrastructures (SAMARIS).
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 132 • Issue 11 • November 2006
Pages: 1793 - 1800
Copyright
© 2006 ASCE.
History
Received: Dec 22, 2004
Accepted: Nov 21, 2005
Published online: Nov 1, 2006
Published in print: Nov 2006
Notes
Note. Associate Editor: Dat Duthinh
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