Seismic behavior comparison of RC shear walls strengthened using FRP composites and steel elements

Document Type : Article


Department of Civil Engineering, Sharif University of Technology, Tehran, Iran



This paper aims at investigating the seismic behavior of strengthened reinforced concrete (RC) shear walls using a 3D finite element analysis. A series of four different configurations of carbon fiber reinforced polymer (CFRP) composites and four different schemes of steel elements are utilized to compare the two methods of retrofitting RC shear walls with similar dimensions and reinforcement ratios. Nonlinear simulations of the RC shear walls are conducted under the action of lateral cyclic loading in ABAQUS Explicit software. In addition, the numerical modeling for RC walls strengthened by CFRP composites as well as steel elements are validated according to the previous experimental studies. The numerical results reveal that both types of strengthening methods have desirable performance in terms of the ultimate load capacity, failure displacement, energy absorption, and ductility in comparison with the control shear wall (CSW). Furthermore, evaluation of the response parameters including secant stiffness and dissipated energy demonstrate that utilizing steel elements is more advantageous compared to CFRP composites.


1. Bakis, C.E., Bank, L.C., Brown, V.L., Cosenza, E., Davalos, J.F., Lesko, J.J., Machida, A., Rizkalla, 1180 O. Habibi et al./Scientia Iranica, Transactions A: Civil Engineering 28 (2021) 1167{1181
S.H., and Trianta llou, T.C. Fiber-reinforced polymer composites for construction{State-of-the-art review", Journal of Composites for Construction, 6(2), pp. 73{87 (2002).
2. Marini, A. and Meda, A. Retro tting of R/C shear walls by means of high performance jackets", Engineering Structures, 31(12), pp. 3059{3064 (2009).
3. Mosto nejad, D. and Mohammadi Anaei, M. E ect of con ning of boundary elements of slender RC shear wall by FRP composites and stirrups", Engineering Structures, 41, pp. 1{13 (2012).
4. Siddika, A., Al Mamun, M.A., Ferdous, W., and Alyousef, R. Performances, challenges and opportunities in strengthening reinforced concrete structures
by using FRPs{A state-of-the-art review", Engineering Failure Analysis, 111, p. 104480 (2020).
5. Trianta llou, T.C. Strengthening of structures with advanced FRPs", Progress in Structural Engineering and Materials, 1(2), pp. 126{134 (1998).
6. Lombard, J., Lau, D.T., Humar, J.L., Foo, S., and Cheung, M.S. Seismic strengthening and repair of reinforced concrete shear walls", Proc., 12th World Conf. on Earthquake Engineering, pp. 1{8 (2000).
7. Ghobarah, A. and Khalil, A.A. Seismic rehabilitation of reinforced concrete walls using bre composites", Proceedings of the 13th World Conference on Earthquake
Engineering, Vancouver, BC, Canada, August, pp. 1{6 (2004).
8. Altin, S., Anil,  O., Kopraman, Y., and Kara, M.E. Hysteretic behavior of RC shear walls strengthened with CFRP strips", Composites Part B: Engineering, 44(1), pp. 321{329 (2013).
9. Qazi, S., Michel, L., and Ferrier, E. Seismic behaviour of RC short shear wall strengthened with externally bonded CFRP strips", Composite Structures, 211, pp. 390{400 (2019).
10. Mohammadi Vojdan, B. and Aghayari, R. Investigating the seismic behavior of RC shear walls with openings strengthened with FRP sheets using di erent
schemes", Scientia Iranica, 24(4), pp. 1855{1865 (2017).
11. Husain, M., Eisa, A.S., and Hegazy, M.M. Strengthening of reinforced concrete shear walls with openings using carbon ber-reinforced polymers", International Journal of Advanced Structural Engineering, 11(2), pp.
129{150 (2019).
12. Aviles, N.B., Maruyama, K., and Rojas, L.E. Improving strength and ductility by using steel plate wrapping", Proceeding of the 11th World Conference on Earthquake Engineering, No. 742 (1996).
13. Elnashai, A.S. and Pinho, R. Repair and retro tting of RC walls using selective techniques", Journal of Earthquake Engineering, 2(04), pp. 525{568 (1998).
14. Taghdi, M., Bruneau, M., and Saatcioglu, M. Seismic retro tting of low-rise masonry and concrete walls using steel strips", Journal of Structural Engineering,
126(9), pp. 1017{1025 (2000).
15. Christidis, K.I., Vougioukas, E., and Trezos, K.G. Strengthening of non-conforming RC shear walls using di erent steel con gurations", Engineering Structures, 124, pp. 258{268 (2016).
16. Kheyroddin, A. and Naderpour, H. Nonlinear nite element analysis of composite RC shear walls", Iranian Journal of Science and Technology, 32(B2), p. 79 (2008).
17. Zhou, Z., Qian, J., and Huang, W. Shear strength of steel plate reinforced concrete shear wall", Advances in Structural Engineering, 23(8), pp. 1629{1643 (2020).
18. SIMULIA, ABAQUS/Standard Version 6.18 Analysis User's Manual (2018).
19. Kent, D.C. and Park, R. Flexural members with con ned concrete", Journal of the Structural Division, 97(7), pp. 1969{1990 (1971).
20. Hafezolghorani, M., Hejazi, F., Vaghei, R., Bin Jaafar, M.S., and Karimzade, K. Simpli ed damage plasticity model for concrete", Structural Engineering International,
27(1), pp. 68{78 (2017).
21. Nayal, R. and Rasheed, H.A. Tension sti ening model for concrete beams reinforced with steel and FRP bars", Journal of Materials in Civil Engineering, 18(6), pp. 831{841 (2006).
22. Wahalathantri, B.L., Thambiratnam, D.P., Chan,T.H.T., and Fawzia, S. A material model for
exural crack simulation in reinforced concrete elements using ABAQUS", Proceedings of the First International
Conference on Engineering, Designing and Developing the Built Environment for Sustainable Wellbeing, Queensland University of Technology, pp. 260{264 (2011).
23. Dumova-Jovanoska, E., Drafting of Macedonian NDPs for EN 1998 { Design of structures for earthquake resistance { Part 3: Assessment and retro tting
of buildings", 15th World Conference on Earthquake Engineering (15WCEE) (2012).
24. EN, C.E.N.:3 Eurocode 8: Design of structures for earthquake resistance{part 3: Assessment and retro tting of buildings, European Committee for
Standardization, Brussels, Belgium (2005).
25. Park, R. Ductility evaluation from laboratory and analytical testing", Proceedings of the 9th World Conference on Earthquake Engineering, Tokyo-Kyoto,
Japan, pp. 605{616 (1988).
26. Sullivan, T.J., Calvi, G.M., and Priestley, M.J.N. Initial sti ness versus secant sti ness in displacement
based design", 13th World Conference of Earthquake Engineering (WCEE), Citeseer (2004).