Title:
Carbon Fiber-Reinforced Polymer Prestressed Prisms as Reinforcement in Continuous Concrete T-Beams
Author(s):
Shahryar Davoudi, Dagmar Svecova, and Catalin Gheorghiu
Publication:
Structural Journal
Volume:
105
Issue:
3
Appears on pages(s):
368-374
Keywords:
carbon fiber-reinforced polymer; cracking; deflection; ductility; high-strength concrete; moment redistribution; prestressed concrete
DOI:
10.14359/19796
Date:
5/1/2008
Abstract:
This paper describes the behavior of two-span continuous concrete T-beams reinforced with carbon fiber-reinforced polymer (CFRP) prestressed concrete prisms (PCP) at service and ultimate. Companion steel and CFRP-reinforced beams were tested for comparison and to evaluate the effect of reinforcement on beam behavior. High-strength concrete prisms were concentrically prestressed by a single CFRP bar and used as main reinforcement in these beams. Theoretical analysis showed superior performance of PCP-reinforced beams before cracking of prisms and higher ductility than CFRP-reinforced beams at ultimate. Test results confirmed that prior to cracking of the prisms, PCP-reinforced beams had comparable deflection with steel reinforced beams, whereas deflection in the CFRP-reinforced beams was 2.5 times larger. PCP-reinforced beams exhibited the narrowest crack widths prior to cracking of the prisms. At ultimate, steel-reinforced beams showed the highest ductility and moment redistribution followed by PCP- and CFRP-reinforced beams.