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 10 - Issue 11, November 2021 Edition

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

Website: http://www.ijstr.org

ISSN 2277-8616

Behaviour of Rectangular Hollow Steel Beams Strengthened with CFRP Sheets Applied in Longitudinal and Transversal Directions

[Full Text]



Hanan Hussien Eltobgy, Anwar Badawy Abu-Sena, Omer Nazmi Abdelnabi



Rectangular Hollow Steel Section, CFRP, Strengthening, Stiffness, Strength, Pucks’ failure criteria



Carbon Fibers Reinforced Polymers (CFRP) are widely utilized to strengthening various structural elements in order to sustain higher loads or to restore the strength of the deteriorated elements. This paper aims to investigate the behavior of hollow steel beams reinforced by unidirectional carbon fibers composite laminates applied in longitudinal and transversal directions. Experimental and numerical investigations were conducted in this study. Six specimens of rectangular hollow sectional (RHS) were subjected to a four-point loading test and divided into two groups. Each group of three specimens was tested in different positions “Mx and My”. Each group included one reference beam and two, specimens strengthened with CFRP laminates in longitudinal and transversal directions. Ultimate loads and deflection were determined through the tests. Numerical analysis was performed using a finite element program in order to determine the failure load of beams. Results of finite element model were verified with their experimental counterparts, it is found in a good agreement. As per experimental results, using the CFRP strengthening system effectively improved the strength and the ductility of strengthened beams. Also, strengthened beams with longitudinal laminates achieved a higher improvement compared to strengthened beams with transversal laminates.



[1]. Photiou N.K, Hollaway L.C, and Chryssanthopoulos M.K. “Strengthening of an artificially degraded steel beam utilizing a carbon/glass composite system” Construction and Building Materials 20 (2006) 11–21
[2]. Elchalakani M. “CFRP Strengthening and Rehabilitation of Degraded Steel Welded RHS Beams Under Combined Bending and Bearing” Thin-Walled Structures 77 (2014) 86–108.
[3]. Yu Chena, Jun Wana, Kang He “ Experimental Investigation on Axial Compressive Strength Of Lateral Impact Damaged Short Steel Columns Repaired With CFRP Sheets” Thin-Walled Structures 131 (2018) 531–546.
[4]. Md Iftekharul Alam, Sabrina Fawzia “Numerical Studies on CFRP Strengthened Steel Columns Under Transverse Impact” Composite Structures 120 (2015) 428–441.
[5]. Majid M.A. Kadhim, Zhangjian Wu, Lee S. Cunningham “Loading Rate Effects On CFRP Strengthened Steel Square Hollow Sections Under Lateral Impact” Engineering Structures 171 (2018) 874–882.
[6]. American Institute of Steel Construction (AISC). Manual of Steel Construction. Chicago, Illinois, USA: Load and Resistance Factor Design (LRFD); March 2016
[7]. SIKA EGYPT Company ‘‘Sika Wrap®-230C. Product data sheet” March 2020, Version 01.03.
[8]. SIKA EGYPT Company ‘‘Sika dur®-330. Product data sheet” August 2018, Version 01.01.
[9]. ANSYS, Finite Element Analysis Program and Theory Manuals, Release V17.2, 2016.
[10]. Abdel-Rahman N, and Sivakumaran K.S. “Evaluation and Modeling of the Material Properties for Analysis of Cold-Formed Steel Sections” International Specialty Conference on Cold-Formed Steel Structures. Paper 3, October 17, 1996.
[11]. Batuwitage C, Fawzia S, Thambiratnam DP, Tafsirojjaman T, Al-Mahaidi R, and Elchalakani M. “CFRP-Wrapped Hollow Steel Tubes Under Axial Impact Loading.” Tubular Struct. XVI Proc. 16th Int. Symp. Tubul. Struct. (ISTS 2017, 4-6 December 2017, Melbourne, Aust., CRC Press; 2017, p. 401-407.
[12]. Mostofinejad D, and Moshiri N. “Compressive strength of CFRP composites used for strengthening of RC columns: comparative evaluation of EBR and grooving methods.” J. Compos. Constr. 2015; 19 (5).
[13]. ECP Committee 208-05 “Egyptian code of practice for the use of fiber reinforced polymer in the construction field” ECP Committee 208, Ministry of Housing and Urban Communities, Egypt, 2005.
[14]. Xia S.H, and Teng J.G. “Behaviour of FRP-to-Steel Bonded Joints” the International Symposium on Bond Behaviour of FRP in Structures (BBFS 2005).
[15]. Kachlakev D, Miller T, Yim S, Chansawat K, and Potisuk T. “Finite element modeling of reinforced concrete structures strengthened with FRP laminates”. Final Report SPR-316, Oregon Department of Transportation, May 2001.
[16]. Fernando D, Yu T, and Teng T.G. “Behavior and Modeling of CFRP-Strengthened Rectangular Steel Tubes Subjected to a Transverse End Bearing Load” International Journal of Structural Stability and Dynamics Vol. 15, No. 8 (2015) 1540031 (24 pages).
[17]. Puck A, Kopp J, and Knops M. “Guidelines for the Determination of the Parameters in Puck’s Action Plane Strength Criterion” Composites Science and Technology. Vol. 62.371-378. 2002.
[18]. Gu J, Li K, and Su L. “A Continuum Damage Model for Intralaminar Progressive Failure Analysis of CFRP Laminates” Materials 2019, 12, 3292
[19]. Bright R.J, and Sumathi M. “Failure Analysis of FRP Composite Laminates Using Progressive Failure Criteria” International Journal of Scientific & Engineering Research Volume 8, Issue 6, June-2017.
[20]. Kumar A, and Rangavittal H.K. “Convergence Studies in the Finite Element Analysis of CFRP Shaft under Torsion Using Shell281, Shell181, and Comparison with Analytical Results.” In: Li C., Chandrasekhar U., Onwubolu G. (eds) Advances in Engineering Design and Simulation, (2020), Lecture Notes on Multidisciplinary Industrial Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-8468-4_17.
[21]. Barour S, and Zergua A. “Finite Element Modeling of Strengthened Beams Using CFRP” J. Build. Mater. Struct. (2019) 6: 77-87, DOI: 10.5281/zenodo.3352308.