Title:
Shear Performance of FRCM Strengthened RC Beams
Author(s):
Luciano Ombres, Salvatore Verre
Publication:
Symposium Paper
Volume:
324
Issue:
Appears on pages(s):
7.1-7.22
Keywords:
shear, reinforced concrete, strengthening system, composites, fibers
DOI:
10.14359/51702359
Date:
4/1/2018
Abstract:
The interest in retrofit/rehabilitation of existing concrete structures has increased due to degradation
and/or introduction of more stringent design requirements. This work focuses the attention on the shear capacity of
reinforced concrete beams strengthened with different FRCM (Fiber Reinforced Cementitious Matrix) systems. The
shear performances of strengthened beams are analyzed by experimental results available in the literature. To
evaluate the influence of the main factors (geometrical and mechanical) on the structural response on FRCM shear
strengthened reinforced concrete beams, a critical discussion of experimental results is given.
A semi-empirical analytical model, able to predict the shear capacity of strengthened beams, is proposed and its
predictions were compared with those furnished by both Code models (ACI model, CNR DT model, fib model) and
experimental results. A numerical procedure founded on a FE model is, also, developed and adopted to simulate the
shear response of FRCM shear strengthened reinforced concrete beams. The effectiveness of the numerical
procedure is, then, verified by a comparison in terms of both load-displacements response and shear capacity with
experimental results.
Related References:
1. Ombres, L. 2011. Flexural analysis of reinforced concrete beams strengthened with a cement based high strength composite material, Composite Structures, 94(1), 143-155.
2. Carloni, C., Bournas, D., Carozzi, G., D’Antino, T., Fava, G., Focacci, F., et al. 2016. Fiber Reinforced composites with cementitious (inorganic) matrix. In: Pellegrino C., Sena-Cruz, J. eds. Design procedures for the use of composites in strengthening of reinforced concrete structures. RILEM state-of-the-art report 19, 349-391.
3. Brückner, A., Ortlepp, R. and Curbach, M. 2006. Textile reinforced concrete for strengthening in bending and shear, Materials and Structures, 39, 741-747.
4. Triantafillou, C.T. and Papanicolaou, C.G. 2006. Shear strengthening of reinforced concrete members with textile reinforced mortar (TRM) jackets, Materials and Structures, 36, 93-103.
5. D’Ambrisi, A. and Focacci, F. 2012. Flexural strengthening of RC beams with cement based composites, Journal of Composites in Constructions, 15(5), 707-720.
6. Elsanadedy, H.M., Almusallam, T.H., Alsayed, S.H. and Al-Salloum, Y.A. 2013. Flexural strengthening of RC beams using textile reinforced mortar-experimental and numerical study, Composite Structures, 97, 40-55.
7. Loreto,G., Leardini, L., Arboleda, D. and Nanni, A. 2014. Performance of RC slab-type elements strengthened with fabric reinforced cementitious matrix (FRCM) composites, Journal of Composites in Constructions, 18(3).
8. Jung, K., Hong, K., Han, S., Park, J. and Kim, J. 2015. Shear strengthening performance of hybrid FRP-FRCM, Advances in Materials Science and Engineering, Volume 2015, article ID 564876.
9. Sneed, L.H., Verre, S., Carloni, C., and Ombres, L. 2016. Flexural behavior of RC beams strengthened with steel-FRCM composite, Engineering Structures, 127, 686-699.
10. D’Ambrisi, A., Feo, L. and Focacci, F. 2014. Experimental analysis on bond between PBO-FRCM strengthening materials and concrete, Composites part B, 44(1), 524-532.
11. D’Antino, T., Carloni, C., Sneed, L. and Pellegrino, C. 2014. Matrix-fiber bond behavior in PBO FRCM composites: a fracture mechanics approach, Engineering Fracture Mechanics, 117, 94-111.
12. Sneed, L, D’Antino, T. and Carloni, C. 2014. Investigation of bond behavior of polyparaphenylene benzobisoxazole fiber-reinforced cementitious matrix composite-concrete interface, ACI Materials Journal, 111(5), 569-580.
13. Ombres, L. 2015. Analysis of the bond between fabric reinforced cementitious mortar (FRCM) systems and concrete, Composites part B, 69, 418-426.
14. Carloni C., Verre, S., Sneed, L.H., Ombres, L. 2017. Loading rate effect on the debonding phenomenon in fiber reinforced cementitious matrix-concrete joints, Composites Part B, 108, 301-314.
15. American Concrete Institute, ACI 549.4R-13- Guide to design and construction of externally bonded fabricreinforced cementitious matrix (FRCM) systems for repair and strengthening concrete and masonry structures.
16. CNR-DT 200 R1/2013. Guide for the design and construction of externally bonded FRP systems for strengthening existing structures e materials, RC and PC structures, masonry structures. Rome, Italy: Italian National Research Council; 2013.
17. Fédération Internationale du Beton (fib). 2001. Bullettin 14-Externally bonded FRP reinforcement for RC structures.
18. Brückner, A., Ortlepp, R. and Curbach, M. 2008. Anchoring of shear strengthening for T-beams made of textile reinforced concrete (TRC), Materials and Structures, 41, 407-418.
19. Tzoura, E. and Triantafillou, T. 2016. Shear strengthening of reinforced concrete T-beams under cyclic loadingwith TRM or FRP jackets, Materials and Structures, 49, 17-28.
20. Tetta, Z.C., Koutas, L.N. and Bournas, D.A. 2015. Textile-reinforced mortar (TRM) versus fiber-reinforced polymers in shear strengthening of concrete beams, Composites Part B, 77, 338-348.
21. Tetta, Z.C., Koutas, L.N. and Bournas, D.A. 2016. Shear strengthening of full-scale RC T-beams using textilereinforced mortar and textile-based anchors, Composites Part B, 95, 225-239.
22. Loreto, G., Babaeidarabad, S., Leardini, L. and Nanni, A. 2015. RC beams shear-strengthened with fabricreinforced-cementitious-matrix (FRCM) composite, International Journal of Advanced Structural Engineering, 7, 341-352.
23. Ombres, L. 2015. Structural performances of reinforced concrete beams strengthened in shear with a cement based fiber composite material, Composite Structures, 122, 316-329.
24. Blanksvärd, T., Täljisten, B., and Carolin A. 2009. Shear strengthening of concrete structures with the use of mineral-based composites, Journal of Composites for Construction, 13, 25-34.
25. Escrig, C., Gil, L., Bernat-Maso, E. and Puigvert F. 2015. Experimental and analytical study of reinforced concrete beams shear strengthened with different types of textile-reinforced mortar, Construction and Building Materials, 83, 248-260.
26. Trapko, T., Urbanska, D. and Kaminski, M. 2015. Shear strengthening of reinforced concrete beams with PBOFRCM composites, Composites Part B, 80, 63-72.
27. Al-Salloum, Y.A., Elsanadedy, H.M., Alsayed, S.H. and Iqbal, R.A. 2012. Experimental and numerical study for the shear strengthening of reinforced concrete beams using textile-reinforced mortar, Journal of Composites for Construction, 16, 74-90.
28. Tetta, Z. C. and Bournas, D.A. 2016. TRM vs FRP jacketing in shear strengthening of concrete members subjected to high temperatures, Composites Part B, 106, 190-205.
29. Si Larbi, A., Contamine, R., Ferrier, E. and Hamelin, P. 2010, Shear strengthening of RC beams with textile reinforced concrete (TRC) plate, Construction and Building Materials, 24, 1928-1936.
30. Gonzalez-Libreros J.H., Sabau, C., Sneed, L.H., Pellegrino, C. and Sas, G. 2016. Experimental investigation of RC beams strengthened in shear with externally bonded composites, Proceedings of the CICE 2016-International Conference on Composites in Civil Engineering, Hong Kong.
31. Contamine, R., Si Larbi, A., and Hamelin P. 2013. Identifying the contributing mechanism of textile reinforced concrete (TRC) in the case of shear repairing damaged and reinforced concrete beams, Engineering Structures, 46, 447-458.
32. Awani, O., El Maddawy, T. and El Refai, A. 2016. Numerical simulation and experimental testing of concrete beams strengthened in shear with Fabric-Reinforced Cementitious Matrix, Journal of Composites for Construction, 20(6).
33. Azam, R. and Soudki, K. 2014. FRCM strengthened shear-critical RC beams, Journal of Composites for Construction, 18(5).
34. Triantafillou, T. and Antonopoulos, C.P. 2000. Design of concrete flexural members strengthened in shear with FRP, Journal of Composites for Construction, 4(4), 198-205.
35. ABAQUS Finite Element Code. 2011. Hibbitt, Karlsson & Sorensen, Imc, RI.
36. Chen, G.M., Teng, J.G., Chen, J.F. & Xiao, Q.G. 2015. Finite element modeling of debonding failures in FRPstrengthened RC beams: A dynamic approach, Computers and Structures, 158, 167-183.
37. CEN Eurocode 2. 2003. Design of concrete structures -Part 1-1: General rules and rules for building.
38. Hognestad, E. 1951. Study of combined bending and axial load in reinforced concrete members, University of Illinois, Engineering Experiment Station, Bulletin No. 399.
39. Lu, X.Z., Teng, J.G., Ye, L.P. and Jiang, J.J. 2005. Bond-slip models for FRP sheets/plates bonded to concrete, Engineering Structures, 27, 920-937.
40. Aljazaeri,Z.R. and Myers, J.J. 2016. Strengthening of reinforced concrete beams in shear with fiber reinforced cementitious matrix, Proceedings of the CICE 2016-International Conference on Composites in Civil Engineering, Hong Kong.
41. Baggio, D., Soudki, K., and Noel, M., 2014, Strengthening of shear critical RC beams with various FRP systems, Construction and Building materials, 66, 634-644.
42. Khan, A. and Masood, F. 2016. Strengthening of shear deficient reinforced concrete beams with textile reinforced mortar (TRM), Proceedings of the CICE 2016-International Conference on Composites in Civil Engineering, Hong Kong.