International Journal of Applied Science and Engineering
Published by Chaoyang University of Technology

Gajalakshmi Pandulu*, Revathy Jayaseelan, Jemimah Thong

Department of Civil Engineering, B.S Abdur Rahman Crescent Institute of Science and Technology, Chennai, India


Download Citation: |
Download PDF


ABSTRACT


During earthquake loading, concrete filled steel tubular (CFT) columns subjected to buckling at plastic regions. To control these type of buckling, a new technique is imposed in this research work. Therefore, an additional transverse confinement using carbon fiber reinforcement polymer (CFRP) laminates are wrapped around the CFT columns. An experimental study was conducted on FRP wrapped concrete filled CFT (CCFT) columns. The test variables are thickness of steel tube, different grades of concrete, and number of layers of FRP laminates. Experimental results of CFT columns were compared with computed load carrying capacity of the existing design codes. Of all the codes compared, DL/T 1999 showed the least variations and is found to be more viable to predict ultimate load carrying capacity of CFT columns. Load strain plots obtained from experimental study reiterate the fact that CCFT columns wrapped with two layers of CFRP showed enhanced strength and ductility compared to other CCFT columns. The failure modes of CCFT columns were observed during experimental study.


Keywords: Fiber reinforced polymer laminate, Concrete filled steel tube, Yielding, Local buckling.


Share this article with your colleagues

 


REFERENCES


  1. ACI Committee 318, 1991. Building code requirements for reinforced concrete. American Concrete Institute.

  2. AIJ, 1997. Standard for structural design of reinforced concrete Boxed-Shaped wall structures. Architectural Institute of Japan.

  3. American Society of Testing and Materials, 1989. Standard test methods and definitions for mechanical testing of steel products. ASTM Standard No. A370–89, ASTM, Philadelphia: PA.

  4. BS 5400 (1979): Part 5, Concrete and composite bridges, British standard institute London, UK.

  5. DL/T 5085, 1999. Code for design of Steel-Concrete composite structure, Germany.

  6. Eurocode 4 (2004): Part 1–1: Design of composite steel and concrete structures – General rules and rules for building, University of Nottingham.

  7. Gajalakshmi, P., Helena, H.J. 2012. Behaviour of concrete-filled steel columns subjected to lateral cyclic loading. Journal of Constructional Steel Research, 75, 55–63.

  8. Guo, Y., Zhang, Y. 2018. Comparative study of CFRP-Confined CFST stub columns under Axial compression. Advances in Civil Engineering, 2018, 1–8.

  9. Lai, M.H., Ho, J.C.M. 2014. Confinement effect of ring-confined concrete-filled-steel-tube columns under uni-axial load. Engineering structures, 67, 123–141.

  10. Li, P., Zhang, T., Wang, C. 2018. Behavior of Concrete-Filled Steel Tube Columns Subjected to Axial Compression. Advances in Materials Science and Engineering. 2018, 1–15.

  11. Load and Resistance factor design specification for structural steel buildings LRFD (1999), American Institute of Steel Construction.

  12. Muhammad, S., Memon, Shamim, A., Sheikh, 2005. Seismic resistance of square concrete columns retrofitted with glass Fiber-Reinforced polymer. ACI Structural Journal, 102, 774–783.

  13. Mukherjee, T.E., Boothby, C.E., Bakis, Joshi, M.V., Maitra, S.R. 2004. Mechanical behavior of Fiber-Reinforced Polymer-Wrapped concrete columns. Journal of Composite Construction, 8, 97–103.

  14. Pessiki, S., Harries, K., Kestner, J.T., Sause, R., Ricles, J.M. 2001. Axial behavior of reinforced concrete columns confined with FRP jackets. Journal of Composite Construction, 5, 237–245.

  15. Tabacu, S. 2016. Analysis of circular tubes with rectangular multi-cell insert under oblique impact loads. Journal of Thin Walled Structures, 106, 129–147.

  16. Wang, Z.-B., Yu, Q., Tao, Z. 2015. Behaviour of CFRP externally-reinforced circular CFST members under combined tension and bending. Journal of Constructional Steel Research, 106, 122–137.

  17. Yu, T., Hu, Y.M., Teng, J.G. 2014. FRP-confined circular concrete-filled steel tubular columns under cyclic axial compression. Journal of Constructional Steel Research, 94, 33–48.


ARTICLE INFORMATION


Received: 2019-02-16
Revised: 2019-03-31
Accepted: 2020-10-15
Available Online: 2020-12-01


Cite this article:

Pandulu, G., Jayaseelan, R., Thong, J. 2020. Behavior of FRP wrapped concrete filled steel tubular columns. International Journal of Applied Science and Engineering, 17, 393–403. https://doi.org/10.6703/IJASE.202012_17(4).393

  Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.