Experimental Observation on the Effectiveness of Fiber Sheet Strip Stirrups in Concrete Beams
Publication: Journal of Composites for Construction
Volume 14, Issue 5
Abstract
Experimental observations were made for the effectiveness of fiber sheet strips (FSSs) as internal stirrups in comparison with fiber-reinforced polymer (FRP) rod stirrups and steel stirrups. A total number of 10 concrete beams were tested under three-point loading. Each beam measured 1,400 mm long, 150 mm wide, and 250 mm deep. Their shear span-depth ratios were 2.5. The beams were composed of different shear reinforcements: one without stirrups, two with steel stirrups, one with carbon FRP rod stirrups, and the rest with different types of FSS stirrups. The main variables include stirrup types, strengthening of bent portions of FSS stirrups, impregnation, and shear reinforcement ratio for FSS stirrups. Test results indicated that concrete beams reinforced with FSS stirrups had enhanced shear strength over the beam without shear reinforcements. Moreover, the FSS stirrup-reinforced beams could maintain comparable shear behavior to that of the concrete beam reinforced with steel stirrups in overall load-deflection relationships, shear strengths, crack patterns, and crack widths at maximum load.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This research was supported by the Chung-Ang University Research Grants in 2008. The authors wish to thank Chung-Ang University for providing the financial support for this investigation.
References
ACI 440.1R-06. (2006). “Guide for the design and construction of structural concrete reinforced with FRP bars.” Farmington Hills, Mich.
ACI 440.2R-02. (2002). “Guide for the design and construction of externally bonded FRP systems for strengthening concrete structure.” Farmington Hills, Mich.
ACI 440.4R-04. (2004). “Prestressing concrete structures with FRP tendons.” Farmington Hills, Mich.
ACI-ASCE Joint Committee 445. (1998). “Recent approaches to shear design of structural concrete.” J. Struct. Eng., 124(12), 1375–1417.
Bousselham, A., and Chaallal, O. (2004). “Shear strengthening reinforced concrete beams with fiber reinforced polymer: Assessment of influencing parameters and required research.” ACI Struct. J., 101(2), 219–227.
Bousselham, A., and Chaallal, O. (2008). “Mechanisms of shear resistance of concrete beams strengthened in shear with externally bonded FRP.” J. Compos. Constr., 12(5), 499–512.
CAN/CSA-S06-06. (2006). “Canadian highway bridge design code.” Rexdale, Ont., Canada.
CAN/CSA-S806-02. (2002). “Design and construction of building components with fiber reinforced polymers.” Rexdale, Ont., Canada.
Dias, S., Juvandes, L., and Figueiras, J. (2004). “Strengthening of reinforced concrete structures in bending with CFRP.” Revista IBRACON de Estructuras, 1(1), 1–19 (Instituto Brasilero de Concreto).
Ehsani, M. R., Saadatmanesh, H., and Tao, S. (1995). “Bond of hooked glass fiber reinforced plastic (GFRP) reinforcing bars to concrete.” ACI Mater. J., 92(4), 391–400.
El-Sayed, A. K., El-Salakawy, E. F., and Benmokrane, B. (2006). “Shear strength of FRP-reinforced concrete beams without transverse reinforcement.” ACI Struct. J., 103(2), 235–243.
El-Sayed, A. K., El-Salakawy, E. F., and Benmokrane, B. (2007). “Mechanical and structural characterization of new carbon FRP stirrups for concrete members.” J. Compos. Constr., 11(4), 352–362.
Fam, A. Z., Rizkalla, S. H., and Tadros, G. (1997). “Behavior of CFRP for prestressing and shear reinforcements of concrete highway bridges.” ACI Struct. J., 94(1), 77–86.
ISIS-M03-01 Design Manual. (2007). “Reinforcing concrete structures with fibre reinforced polymers.” Canadian Network of Centers of Excellence on Intelligent Sensing for Innovative Structures, Univ. of Winnipeg, Man., Canada.
JSCE. (1997). “Recommendation for design and construction of concrete structures using continuous fiber reinforcing materials.” Concrete engineering series No.23, p. 325.
McGregor, J. G., and Wight, J. K. (2008). Reinforced concrete: Mechanics and design, Prentice-Hall, Englewood Cliffs, N.J.
Nagaska, T., Fukuyama, H., and Tanigaki, M. (1993). “Shear performance of concrete beams reinforced with FRP stirrups.” ACI, Special Publication, SP138-47, 789–812.
Park, S. Y., and Naaman, A. E. (1999). “Shear behavior of concrete beams prestressed with FRP tendons.” PCI J., 44(1), 74–85.
Pellegrino, C., and Modena, C. (2002). “FRP shear strengthening of RC beams with transverse steel reinforcement.” J. Compos. Constr., 6(2), 104–111.
Pellegrino, C., and Modena, C. (2006). “Fiber-reinforced polymer shear strengthening of reinforced concrete beams: experimental study and analytical modeling.” ACI Struct. J., 103(5), 720–727.
Pellegrino, C., and Modena, C. (2008). “An experimentally based analytical model for shear capacity of FRP strengthened reinforced concrete beams.” Mech. Compos. Mater., 44(3), 231–244.
Razaqpur, A. G., and Isgor, O. B. (2006). “Proposed shear design method for FRP-reinforced concrete members without stirrups.” ACI Struct. J., 103(1), 93–102.
Shehata, E., Morphy, R., and Rizkalla, S. (1998). “Use of FRP as shear reinforcement for concrete structures.” Second international concrete on composites in infrastructure, Edited by Saadatmanesh and M. R. Ehsanim, ISIS Canada, University of Manitoba, Winnipeg, Manitoba, Canada, 300–314.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 14 • Issue 5 • October 2010
Pages: 487 - 497
Copyright
© 2010 ASCE.
History
Received: Aug 5, 2009
Accepted: Jan 28, 2010
Published online: Feb 3, 2010
Published in print: Oct 2010
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.