Load-Bearing Capacity of Deviated CFRP Strips
Publication: Journal of Composites for Construction
Volume 18, Issue 4
Abstract
The paper presents experimental work to determine the load-bearing capacity, strain responses up to failure, and failure mode of pultruded carbon fiber–reinforced polymer (CFRP) strips with different deviation saddle geometries. Several tests with different deviation angles and deviation saddle radii were carried out. The results show that the tensile strength of the CFRP strip is reduced significantly by deviation, even if the deviation radius is comparatively large in relation to the thickness of the CFRP strips. Further tests were carried out to determine the influence of other important parameters on the load-bearing capacity of the strip such as surface properties of the saddle. With the help of a polyethylene layer (PE-HD) between the CFRP strip and the deviation saddle, friction could be reduced. This leads to an increase in the breaking strength of the CFRP strip. The effect of these parameters on the load-bearing capacity of the CFRP strip is presented in this article.
Get full access to this article
View all available purchase options and get full access to this article.
References
Andrä, H. P., and Maier, M. (2000). “Post-strengthening with externally bonded prestressed CFRP strips.” Proc., 16th Congress of IABSE, IABSE, Lucerne, 1507–1514.
Char, M. S., Saadamanesh, H., and Ehsani, M. R. (1994). “Concrete girders externally prestressed with composite plates.” PCI J., 39, 40–51.
El-Hacha, R., Gren, M., and Wight, G. (2003). “Innovative system for prestressing fiber-reinforced polymer sheets.” ACI Struct. J., 100(3), 305–313.
El-Hacha, R., Wight, G., and Gren, M. (2004). “Prestressed CFRP sheets for strengthening concrete beams at room and low temperatures.” J. Compos. Constr., 3–13.
European Organisation for Technical Approvals (EOTA). (2002). “Guideline for European technical approval of post-tensioning kits for prestressing of structures.”, Brussels.
Grace, N. F., Enomoto, T., Sachidanandan, S., and Purayankara, S. (2006). “Use of CFRP/CFCC reinforcement in prestressed concrete box beam bridges.” ACI Struct. J., 103(1), 123–132.
Grace, N. F., Singh, S. B., Shinouda, M. M., and Sunup, S. M. (2005). “Concrete beams prestressed with CFRP.” ACI Concr. Int., 27(2), 60–64.
Hutchinson, R., Abdelrahman, A., and Rizkalla, S. (1997). “Shear strengthening using CFRP sheets for a prestressed concrete highway bridge in Manitoba, Canada.” Proc., U.S.–Canada–Europe Workshop in Bridge Engineering–Advanced Rehabilitation, Durable Materials, Non-Destructive Evaluation and Management, U. Meier and R. Betti, eds., EMPA, Dübendorf, Switzerland, 97–104.
Kesse, G., and Lees, J. M. (2007). “Experimental behaviour of reinforced concrete beams strengthened with prestressed CFRP shear straps.” J. Compos. Constr., 375–383.
Kotynia, R., Walendziak, R., Stoecklin, I., and Meier, U. (2011). “RC slabs strengthened with prestressed and gradually anchored CFRP strips under monotonic and cyclic loading.” J. Compos. Constr., 168–180.
Meier, U. (1992). “Carbon fiber-reinforced polymers: Modern materials in bridge engineering.” Struct. Int., 2(1), 7–12.
Meier, U. (1995). “Strengthening of structures using carbon fibre/epoxy composites.” Constr. Build. Mater., 9(6), 341–351.
Meier, U., and Winistörfer, A. (1995). “Retrofitting of structures through external bonding of CFRP sheets.” Non-metallic (FRP) reinforcement of concrete structures, L. Taerwe, ed., E&FN Spon, London, 465–472.
Michels, J., Sena-Cruz, J., Czaderski, C., and Motavalli, M. (2013). “Structural Strengthening with Prestressed CFRP Strips with Gradient Anchorage.” J. Compos. Constr., 651–661.
Neubauer, U., and Rostasy, F. S. (1997). “Design aspects of concrete structures strengthened with externally bonded CFRP-plates.” Proc., 7th Int. Conf. on Structural Faults and Repair, Vol. 2: Concrete and Composite, Engineering Technics Press, Edinburgh, Scotland, 109–118.
Rahimi, H. (1996). “Strengthening of concrete structures with externally bonded fibre reinforced plastics.” Ph.D. thesis, Oxford Brookes Univ., Oxford, U.K.
Rohleder, W., Tang, B., Doe, T., Grace, N., and Burgess, C. (2008). “Carbon fiber-reinforced polymer strand application on cable-stayed bridge, Penobscot Narrows, Maine.”, Transportation Research Board, Washington, DC, 169–176.
Stöcklin, I., and Meier, U. (2003). “Strengthening of concrete structures with prestressed and gradually anchored CFRP strips.” Proc., 6th Int. Symp. on FRP Reinforcement for Concrete Structures, K. H. Tan, ed., World Scientific, Singapore, 8–10.
Triantafillou, T. C., and Fardis, M. N. (1997). “Strengthening of historic masonry structures with composite materials.” Mater. Struct., 30(8), 486–496.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 18 • Issue 4 • August 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Feb 12, 2013
Accepted: Oct 16, 2013
Published online: Dec 11, 2013
Discussion open until: May 11, 2014
Published in print: Aug 1, 2014
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.