Title:
Flexural Behavior of GFRP-RC Slabs Post-Tensioned With CFRP Tendons
Author(s):
Martin Noel, Khaled Soudki and Ahmed El-Sayed
Publication:
Symposium Paper
Volume:
275
Issue:
Appears on pages(s):
1-20
Keywords:
CFRP, fiber-reinforced polymers, GFRP, post-tensioned, prestressed, reinforced concrete, SCC, self-consolidating concrete, slabs
DOI:
10.14359/51682469
Date:
3/1/2011
Abstract:
The results of an experimental investigation on the effects of prestressing on the flexural behavior of GFRP-reinforced SCC slabs are presented. A total of six one-way slab strips were tested up to failure, including one steel-reinforced control slab. The five remaining slabs were reinforced with GFRP bars, three of which also contained two CFRP post-tensioned tendons. Steel stirrups were included in one prestressed and one non-prestressed slab to ensure a flexural mode of failure. The slabs were tested under four-point bending. Results were compared to analytical models for ultimate flexural and shear capacity as well as load-deflection behavior. Prestressing effectively increased the cracking load and post-cracking stiffness of the FRP-reinforced slabs and significantly reduced crack widths at service loads. Slabs without shear reinforcement failed in shear in a brittle manner prior to reaching their full flexural capacity. All of the GFRP-reinforced slabs failed at higher loads than the control slab.