BEHAVIOR OF SQUARE REINFORCED CONCRETE COLUMNS STRENGTHENED BY DIFFERENT LAYERS OF GLASS FRP SHEETS

  • MUHSIN KHALID KHDIR
  • BAHMAN OMAR TAHA
  • AHMED REDHA ABDULRAHMAN
Keywords: Glass fiber reinforcement polymer (FRP) sheets; GFRP layer; Square columns; Confinement.

Abstract

The behavior of reinforced square concrete columns strengthened by specific layers of glass fiber
reinforced polymer (FRP) sheets were investigated through an experiment by testing of thirteen variety of
concrete columns that were axially loaded at their ends. The most variable thought of during this study
were the quantity or number of layers of glass fiber reinforcement polymer sheets and also the effect of
confinement techniques (fully wrapped, strip ties and spiral sheets). The test values were compared with
the proposed equation of ACI 440.2R-02, for samples strengthened by one layer of GFRP sheet can
upgrade the load carrying capacity of columns in numerous ways of strengthening (fully wrapped, strip
ties and spirally) by 25.5%, 6.7% and 29.5% respectively compared to the control (unstrengthen) column.
Be that as a result of it would, for columns strengthen by 2 layers of GFRP sheets (fully wrapped, strip ties
and spirally) the load carrying capacity increases by 36.5%, 19.6% and 29.8% respectively. While, for 3
layers of strengthen sample the percent of enhancement in the load carrying capacity increases by 38.2%,
20.1% and 30.7% respectively. Finally, the load carrying capacity increases by 43.2%, 29.2% and 33.2%
for different confinement techniques (fully wrapped, strip ties and spiral sheets) respectively if they are
strengthened by 4 layers of GFRP sheets.

Downloads

Download data is not yet available.

Author Biographies

MUHSIN KHALID KHDIR
Erbi l Technology Institute , Erbil Polytechnic University , Kurdistan Region - Iraq
BAHMAN OMAR TAHA
Erbil Technical Engineering College , Erbil Polytechnic University , Kurdistan Region - Iraq
AHMED REDHA ABDULRAHMAN
Erbi l Technology Institute , Erbil Polytechnic University , Kurdistan Region - Iraq

References

Ahmed R. Abdulrahman, Bahman O. Taha and
Muhsin K. Khdir (2020). Ductility and
Strength Behavior of Reinforced Concrete
Columns Confined by Glass and Carbon FRP
Sheets. The Open Civil Engineering Journal,
ISSN: 1874-1495, Volume 14, pp.56-65. DOI:
10.2174/1874149502014010056,
www.benthamopen.com/FULLTEXT/TOCIEJ
-14-56.
Rahul Raval, Urmil Dave (2013). Behavior of GFRP
wrapped RC Columns of different shapes.
Procedia Engineering (Chemical, Civil and
Mechanical Tracks of the 3rd Nirma
University International Conference on
Engineering (NUiCONE 2012). Volume 51,
pp.240-249. DOI: 10.1016/j.proeng.
www.elsevier.com/locate/procedia.
R. Sudhakar and P. Partheeban (2017). Strengthening
of RCC Column Using Glass Fibre Reinforced
Polymer (GFRP). International Journal of
Applied Engineering Research, ISSN
0973-4562, Volume 12, No. 14, pp. 4478-4483.
http://www.ripublication.com.
R. Kumutha, R. Vaidyanathan, M.S.
Palanichamy (2007). Behaviour of
reinforced concrete rectangular
columns strengthened using GFRP.
Cement & Concrete Composites,
Volume 29, pp.609-615. DOI:
10.1016/j.cemconcomp.2007.03.009,
www.elsevier.com/locate/cemconco
mp.
A. N. Nayak, R. B. Swain, G. N. Prajapati and S.
Swetapadma Palanichamy (2014).
Strengthening of Square RC Columns using
Externally Bonded FRP Sheets. Proc. of the
Second Intl. Conf. on Advances In Civil,
Structural and Mechanical Engineering- CSM
2014, ISBN: 978-1-63248-054-5, 2014,
pp.21-25. DOI: 10.15224/
978-1-63248-054-5-44,
www.seekdl.org/conferences/details/183.html.
A. M. Vasumathi, K. Rajkumar, and G. Ganesh
Prabhu (2014). Compressive Behaviour of RC
Column with Fibre Reinforced Concrete
Confined by CFRP Strips. Advances in
Materials Science and Engineering, Vol. 2014,
Article ID 601915, 10 pages,
DOI:10.1155/2014/601915.
www.hindawi.com/journals/amse/2014/60191
5/.
ACI Committee 440.2R-02, “Guide for the Design
and Construction of Externally Bonded FRP
Systems for Strengthening Concrete Structures
“, ACI 440.2R-02, July 11, 2002.American
Concrete Institute.
ACI 318-19, "Building Code Requirements for
Structural Concrete," (ACI 318-9), American
Concrete Institute, 1983.
Published
2021-01-07
How to Cite
KHDIR, M. K., TAHA, B. O., & ABDULRAHMAN, A. R. (2021). BEHAVIOR OF SQUARE REINFORCED CONCRETE COLUMNS STRENGTHENED BY DIFFERENT LAYERS OF GLASS FRP SHEETS. Journal of Duhok University, 23(2), 720-730. https://doi.org/10.26682/csjuod.2020.23.2.56