Studying the influence of Geometric Characteristics and Arrangement of FRP Layers on Rehabilitation of Concrete Shear Walls

Document Type: Regular Paper

Authors

Department of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran

Abstract

During recent years, the use of fiber-reinforced polymers (FRP) as a desirable alternative for improving the behavior of lateral resisting system are known. There are various factors influencing the quality of such kind of rehabilitation. This study aims to investigate the influence of geometric characteristics and arrangement of FRP layers on rehabilitating of concrete shear walls.  A few reinforced concrete shear walls with different thickness and arrangement of FRP layers were analyzed by ABAQUS finite element model software, under gravity and lateral loads. The results indicated that the variation of shear wall strength is considerable due to confinement provided by the FRP layers based on the influence of thickness and arrangements. It is seen that, the performance of Chess and Cross layers of FRP are more effective than other arrangements for improving the final strength of reinforced concrete shear wall. It is also observed that, by increasing the FRP thickness, the wall performance against lateral loading will be improved considerably.

Keywords

Main Subjects


[1] Behfarnia, K., Sayah, A. (2012). “FRP Strengthening of Shear Walls With Opening.” Asian Journal of Civil Engineering, VOL. 13, No. 5, pp. 691-704.

[2] Chamanara, M.M., Nikkhoo, A. (2010). “Studying the Influence of Rehabilitating of the Steel Shear Wall with Opening and With FRP fibers numerically.” Proceedings of the Fifth National Conference on Civil Engineering, Mashhad, Iran.

[3] Mostofinejad, D., Mohammadi Anaei, M. (2015). “Strengthening of Slender RC Shear Wall with FRP Sheets.” IJST, Transactions of Civil Engineering, Vol. 39, No. C2, pp 385-394.

[4] Todut, C., Dan, D., Stoian, V. (2015).  “Numerical and Experimental Investigation on Seismically Damaged Reinforced Concrete Wall Panels Retrofitted with FRP Composites.” Composite Structures, Vol. 119, pp. 648–665.

[5] Shadan, F., Khaloo, A., Shadan P. (2015). “Numerical Study on Flexural Strengthening of Squat R/C Shear Wall Using FRP Laminates.” Scientia Iranica, Transaction A, Civil Engineering, Vol. 22, pp. 144-156.

[6] Woods J. (2014). “Seismic Retrofit of Deficient Reinforced Concrete Shear Walls using Fiber-reinforced Polymer Sheets: Experimental Study and Anchor Design.” A thesis submitted to the Faculty of Graduate and Postdoctoral Affairs in Partial Fulfillment of the requirements for the degree of Master of Applied Science, Carleton University.

[7] El-Sokkary, H., Galal, K., Ghorbanirenani, I., Léger, P., Tremblay, R. (2013). “Shake Table Tests on FRP-Rehabilitated R/C Shear Walls.” Composite construction, Vol. 17(1), pp. 79–90.

[8] Rezaiefar, A. (2013). “Finite Element Modeling of Cyclically Loaded FRP, Retrofitted R/C Squat Shear Walls.” A Thesis for Degree of Master of Applied Science, Concordia University.

[9] Mostofinejad, D., Mohammadi Anaei, M. (2012). “Effect of Confining of Boundary Elements of Slender R/C Shear Wall by FRP Composites and Stirrups.” Engineering Structures, vol. 41, pp. 1-13.

[10] Lesani, M., Bahaari, M.R., Shokrieh M.M. (2014). “Experimental Investigation of FRP-Strengthened Tubular T-Joints under Axial Compressive Loads.” Construction and Building Materials, vol. 53, pp. 243–252.

[11] Silva, N.M.F., Silvestre, N., Camotim D. (2006). “GBT Formulation to Analyses the Buckling Behavior of FRP Composite Open-Section Thin-Walled Columns.” Thin-Walled Structures, vol. 44, 20–38.

[12] Mohamed, N., Sabry Farghaly, A., Benmokrane, B., Kenneth, W. (2014). “Numerical Simulation of Mid-rise Concrete Shear Walls Reinforced with GFRP Bars Subjected to Lateral Displacement Reversals.” Engineering Structures, Vol. 73, pp. 62–71.

[13] Nguyen, K.Le., Brun, M., Limam, A., Ferrier, E., Michel, L. (2014). “Pushover Experiment and Numerical Analyses on CFRP-Retrofit Concrete Shear Walls with Different Aspect Ratios.” Composite Structures, Vol. 113, pp. 403–418.

[14] Mosallam, A., Nasr, A. (2016). “Structural Performance of R/C Shear Walls with Post-Construction Openings Strengthened with FRP composite laminates.” Journal of Composites, In Press.

[15] Pham, T.M., Youssed, J., M.N.S., Hadi, Tran, T.M. (2016). “Effect of Different FRP Wrapping Arrangements on the Confinement Mechanism.” Procedia Engineering, Vol. 142, pp. 306 – 312.

[16] Luca, A., Nanni, A. (2011). “Single-Parameter Methodology for the Prediction of the Stress-Strain Behavior of FRP-Confined R/C Square Columns.” Journal of Composites for Construction, Vol. 15(3).

[17] Simulia, (2012), “ABAQUS User’s Manual, Version 6.9.

[18] Greifenhagen, Ch., Lestuzzi P. (2005). “Static Cyclic Tests on Lightly Reinforced Concrete Shear Walls, Engineering Structures”. Vol. 27, pp. 1703–1712.