International Journal of Scientific & Technology Research

Home About Us Scope Editorial Board Blog/Latest News Contact Us
10th percentile
Powered by  Scopus
Scopus coverage:
Nov 2018 to May 2020


IJSTR >> Volume 9 - Issue 2, February 2020 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Shear Strengthening Of Steel I-Beam With Cfrp Composites

[Full Text]



P. R. Jagtap, S. M. Pore



Adhesive, CFRP, Deflection, I-Beam, Strengthening



The current study is based on the use of carbon fiber reinforced polymers (CFRP) to strengthen the structural I- Beam to its shear zone. CFRP has light-weight and high-strength, it is very flexible and thus forms all shapes, and is easy to handle during construction, so instead of using conventional methods for repair it can be used for strengthening purpose. Two sections with different cross-sectional dimensions of beams were used for this purpose. The web of the I-Beam was sand-blasted and made rust-free to attach CFRP sheets. Then carbon fiber sheets were attached in different layers using the proper adhesive. The beam with CFRP is cured and experimentation is done on UTM of 100 Ton capacity. A four-point bending test was performed on eight beams and results show that the shear capacity of a strengthened beam is increased by 17% to 40% compared with the non-strengthened beam. The deflection at mid-point of the beam is checked and it is observed that the deflection of the strengthened beam and the non-strengthened beam is the same, thus CFRP strengthening technique is the best way to improve the performance of steel sections within permissible deflection limits. So, such a technique of strengthening steel sections can be used to enhance the properties of various old structures that undergo loss of strength due to corrosion and aging.



[1] M. Tavakkolizadeh and H. Saadatmanesh , “Strengthening of Steel-Concrete Composite Girders Using Carbon Fiber Reinforced Polymers Sheets”, Journal of Structural Engineering, vol. 129, no. 1,pp. 30-40, 2003
[2] Tawfik Q. H. and Karunasena W. K., “Use of CFRP for Rehabilitation of Steel Structures: a Review”, Southern Region Engineering Conference SREC2010, pp. 1-5, 2010
[3] Colombi P. and Poggi C., “Strengthening of Tensile Steel Members and Bolted Joints Using Adhesively Bonded CFRP Plates”, Construction and Building Materials, vol. 20, pp. 22–33, 2006
[4] P.R. Jagtap and S.M. Pore (2019), “Effect of CFRP Strengthening on Web of Steel I-Beam”, International Journal of Innovative Technology and Exploring Engineering, vol. 8, no. 12, pp. 4628-4631, 2019
[5] Zhao X. L. and Zhang L., “State-of-the-Art Review on FRP Strengthened Steel Structures”, Engineering Structures, vol. 29, no. 8, pp. 1808–1823, 2007
[6] Xu Yang, Wan-Yang Gao, Jian-Guo Dai, Zhou-Dao Lu and Ke-Quan Yu, “ Flexural strengthening of RC beams with CFRP grid-reinforced ECC matrix”, Composite Structures, vol. 189, pp. 9-26, 2018
[7] Harries K. A. and EI-Tawil S., ”Steel-FRP Composite Structural Systems”, International Conference on Composite Construction in Steel and Concrete, pp. 703–716, may 2008
[8] Sean C. Jones and Scott A. Civjan, P.E., M.ASCE, “Application of Fiber Reinforced Polymer Overlays to Extend Steel Fatigue Life”, Journal of Composites for Construction, vol. 7, no. 4, pp. 331-338, 2003
[9] P.R. Jagtap and S.M. Pore, “Effectiveness of CFRP composites on compression flange of structural I-beam”, Journal of Engineering, Design and Technology, vol. 17, no. 4, pp. 782–792, 2019
[10] M.A. Ghareeb, M.A. Khedr and E".Y. Sayed-Ahmed, “CFRP strengthening of steel I-beam against local web buckling: A numerical analysis”, Research and Applications in Structural Engineering, Mechanics and Computation – Zingoni (Ed.), ISBN 978-1-138-00061-2, pp. 2421–242, 2013
[11] I.A. Ashcroft, D.J. Hughes and S.J. Shaw, “Adhesive bonding of fibre reinforced polymer composite materials”, Assembly Automation, vol. 20, no. 2, pp. 150 – 161, 2000