Flexural Load Testing of Concrete-Filled FRP Tubes with Longitudinal Steel and FRP Rebar
Publication: Journal of Composites for Construction
Volume 10, Issue 2
Abstract
The flexural performance of reinforced concrete-filled glass-fiber reinforced polymer (GFRP) tubes (CFFTs) has been investigated using seven specimens, in diameter and long. Specimens were reinforced with either steel, GFRP, or carbon–fiber reinforced polymer (FRP) rebar of various sizes. Prefabricated GFRP tubes with most of the fibers oriented in the hoop direction were used in five specimens. One control specimen included conventional steel spirals of stiffness comparable to the GFRP tube and the other had no transverse reinforcement. Test results have shown that CFFT beams performed substantially better than beams with a steel spiral. Unlike CFFTs with FRP rebar, CFFTs with steel rebar failed in a sequential progressive manner, leading to considerable ductility. An analytical model capable of predicting the full response of reinforced CFFT beams, including the sequential progressive failure, has been developed, verified, and used in a parametric study. It is shown that laminate structure of the tube affects the behavior, only after yielding of the steel rebar. Steel reinforcement ratio significantly affects stiffness and strength, whereas concrete strength has an insignificant effect on the overall performance.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The writers wish to acknowledge financial support provided by the ISIS Canada Network of Centres of Excellence, Lancaster Composite, Pultrall Inc., and Queen’s University.
References
American Concrete Institute (ACI Committee 318). (1999). “Building code requirements for reinforced concrete and commentary.” ACI 318M-99/ACI 318RM-99, Detroit.
American Society for Testing and Materials (ASTM). (1995). “Standard test method for tensile properties of polymer matrix composite materials.” ASTM D3039/D3039M-95a, Philadelphia.
American Society for Testing and Materials (ASTM). (1996). “Standard test method for compressive strength of cylindrical concrete specimens.” ASTM C39-96, Philadelphia.
American Society for Testing and Materials (ASTM). (2003). “Test methods and definitions for mechanical testing of steel products.” ASTM A370–03a, Philadelphia.
Burgueno, R., Davol, A., and Seible, F. (1998). “The carbon shell system for modular bridge components.” Proc., 2nd Int. Conf. on Composites in Infrastructure (ICCI’98), Tucson, Ariz., 341–354.
Canadian Standards Association (CSA). (1994). “Design of concrete structures.” A23.3-94, Toronto.
Cole, B. L. (2005) “Flexural and shear performances of reinforced concrete-filled fibre reinforced polymer tubes.” MSc thesis, Queen’s Univ., Kingston, Canada.
Collins, M. P., and Mitchell, D. (1997). Prestressed concrete structures, Response Publications, Canada.
Fam, A., Pando, M., Filz, G., and Rizkalla, S. (2003). “Precast piles for Route 40 bridge in Virginia using concrete-filled FRP tubes.” Math. Intell., 48(3), 32–45.
Fam, A., and Rizkalla, S. (2001). “Behavior of axially loaded concrete-filled circular fiber reinforced polymer tubes.” ACI Struct. J., 98(3), 280–289.
Fam, A., and Rizkalla, S. (2002). “Flexural behavior of concrete-filled fiber-reinforced polymer circular tubes.” J. Compos. Constr., 6(2), 123–132.
Gould, N., and Harmon, T. (2002). “Confined concrete columns subjected to axial load, cyclic shear, and cycle flexure-part II: experimental program.” ACI Struct. J., 99(1), 42–50.
Mandal, S. (2004). “Prestressed concrete-filled fiber reinforced polymer tubes.” MSc thesis, Queen’s Univ., Kingston, Canada.
Mirmiran, A., and Shahawy, M. (1997). “Behavior of concrete columns confined by fiber composites.” J. Struct. Eng., 123(5), 583–590.
Popovics, S. (1973). “A numerical approach to the complete stress-strain curve of concrete.” Cem. Concr. Res., 3(5), 583–599.
Shao, Y. (2003). “Behavior of FRP-concrete beam-columns under cyclic loading.” Ph.D. thesis, North Carolina State Univ., Raleigh, N.C.
Zhao, L. (1997). “Experimental investigation of joint response between concrete-filled carbon shell girders and composite decks using ‘push-out’ tests.” Rep. No. TR-97/16, Div. of Structural Engineering, School of Engineering, Univ. of California at San Diego, San Diego.
Information & Authors
Information
Published In
Copyright
© 2006 ASCE.
History
Received: Apr 1, 2005
Accepted: Jul 18, 2005
Published online: Apr 1, 2006
Published in print: Apr 2006
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.