Behavior of a concrete bridge cantilevered slab reinforced using NSM CFRP strips
Source abstract
Abstract
Abstract Concrete beam strengthening using near surface mounting (NSM) carbon fiber reinforced polymers (CFRP) have shown excellent performance. However, the behavior of these elements in real structures has not yet been deeply studied. This paper presents results, taken over a 2-year period, of a field investigation of the behavior of NSM CFRP reinforcement in a concrete bridge under service conditions. Also, four RC beams were tested in the laboratory under monotonic load to study behavior under ultimate conditions. In service conditions, strains in concrete and CFRP were 42% and 6% of the ultimate capacity, and the concrete slab developed 8% of its ultimate strength, confirming that CFRP improved bridge performance. The results from laboratory tests of CFRP reinforced beams, and the measurements of concrete and CFRP deformations taken at the concrete bridge suggest that the NSM CFRP reinforcement used is effective, and that the strength of the reinforced bridge is adequate.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Structural Behavior of Reinforced Concrete · Innovative concrete reinforcement materials · Concrete Corrosion and Durability
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (31)
Show source-provided references
1. Flexural strengthening of concrete beams with CFRP laminates bonded into slits10.1016/j.cemconcomp.2004.07.004 ↗
2. Täljasten B. CFRP strengthening – concrete structures strengthened with near surface mounted CFRP laminates.
3. Assessing the effectiveness of embedding CFRP laminates in the near surface for structural strengthening10.1016/j.conbuildmat.2005.01.030 ↗
4. Full-scale experimental investigation of repair of reinforced concrete interstate bridge using CFRP10.1061/(ASCE)1084-0702(2006)11:3(350) ↗
5. Creep behaviour of CFRP-strengthened reinforced concrete beams10.1016/j.conbuildmat.2007.09.006 ↗
6. Behavior of precracked RC beams strengthned with carbon FRP sheets10.1061/(ASCE)1090-0268(1997)1:2(63) ↗
7. Experimental and analytical investigations of creep of epoxy adhesive at the concrete–FRP interfaces10.1016/j.ijadhadh.2008.01.003 ↗
8. Shear creep of epoxy at the concrete–FRP interfaces
9. Experimental and analytical investigation of reinforced high strength concrete continuous beams strengthened with fiber reinforced polymer10.1016/j.matdes.2009.09.041 ↗
10. Flexural behavior of concrete beams strengthened with near-surface-mounted CFRP strips
11. Fatige behavior of RC beams strengthened with NSM CFRP rods10.1061/(ASCE)1090-0268(2009)13:5(415) ↗
12. ACI Committee 440.2R. Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures. In: ACI, editor. American Concrete Institute; 2002. p. 45.
13. Strain monitoring of RC members strengthened with smart NSM CFRP bars
14. Strengthening of RC members with near-surface mounted CFRP rods
15. Behavior of bridge deck cantilever overhangs subjected to a static and fatigue concentrated load
16. Badawi M. Monotonic and fatigue flexural behavior of RC beams strengthened with prestressed NSM CFRP rods. Univ. of Waterloo, Ont.; 2007.
17. Dynamic analysis of a bridge repaired by CFRP: experimental and numerical modelling10.1016/j.conbuildmat.2010.09.025 ↗
18. Lopez M, Santa María H, Rodriguez M. Research in progress: monitoring of CFRP reinforcement of the centenario bridge. In: Murphy MLD, editor. US – South America workshop. Innovative Materials for Civil Infraestructure, Research and Education. Santiago, Chile: Pontificia Universidad Católica de Chile – National Science Foundation; 2008.
19. Investigation of bond in concrete structures strengthened with near surface mounted carbon fiber reinforced polymer strips10.1061/(ASCE)1090-0268(2003)7:3(248) ↗
20. CSI. SAP 2000. Computers and structures INC structural and earthquake engineering software, California; 2011.
21. Bathe KJ. Finite element procedures, Cambridge; 2007.10.1002/9780470050118.ecse159 ↗
22. AASHTO. AASHTO LRFD bridge design specifications. 4th ed. Washington; 2007.
23. Nawy · 2003
24. Arguello R. Predicción de Vida Útil de Puentes Reforzados con FRP Sujetos a Esfuerzos de Fatiga. Santiago: Pontificia Universidad Católica de Chile; 2010.
25. Near-surface mounted FRP reinforcement: an emerging technique for strengthening structures10.1016/j.compositesb.2006.08.003 ↗
26. Debonding failures of RC beams strengthened with near surface mounted CFRP strips10.1061/(ASCE)1090-0268(2006)10:2(92) ↗
27. ACI Committee 318. In: ACI, editor. Building code requirements for structural concrete (ACI 318–08) and commentary. American Concrete Institute; 2008.
28. ACI Committee 440.2R. In: ACI, editor. Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures. American Concrete Institute; 2008.
29. Hognestad E. In: Bulletin UoIEES, editor. A study of combined bending and axial load in reinforced concrete members; 2002. p. 3991951.
30. De Paula Machado A. Refuerzo de estructuras de concreto armado con fibras de carbono; 2005.
31. Campos R. Proyecto de Estructuras Memoria de Cálculo Ensanche Puente Centenario. RCQ Ingeniería; 2008.