Research on the Properties of the Concrete Filled Steel Tube Columns with CFRP Composite Materials

Abstract:

This paper presents a phase of the research program to determine the feasibility of a proposed CFRP retrofit method to strengthen the corroded concrete filled steel tube columns. This method is wrapping the corroded concrete filled steel tube column with CFRP material. Eight concrete filled steel tube columns were tested in the laboratory with four of them strengthened using the proposed technique. All specimens were notched in the center zone to simulate the loss of section due to corrosion the four of them were wrapped with CFRP composite tubes in the damage area. All specimens were axially loaded to failure while strain and displacement were measured to demonstrate the validity of this repair concept. This paper presents the experimental results and discusses the findings with preliminary conclusions on the feasibility of the proposed strengthening method.

• Periodical: Advanced Materials Research (Volumes 163-167)
• Pages: 3555-3559
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.163-167.3555
• Online since: December 2010
• Authors: Wei Gu, Hong Nan Li
• Keywords: Carbon Fiber Reinforced Polymer/Plastic (CFRP), Composite Column, Composite Structure, Stress-Strain Curve

References

[1] Wei Gu, Yinghua Zhao. Load carrying capacity of concrete filled CFRP-steel tubes under axial compression [J]. Engineering Mechanics, 2006, 23(1): 149―153. (in Chinese).

[2] Wei Gu, Yinghua Zhao, research on bearing capacity of long concrete-filled cfrp-steel tubular columns with axial compression [J]. Engineering Mechanics, 2008, 25(7): 147―152. (in Chinese).

[3] Wei Gu, Yinghua Zhao. Experimental study on concrete filled CFRP-steel tube columns with axial compression [ J ]. China Civil Engineering Journal, 2007, 40(11): 23-28. (in Chinese).

[4] Wei Gu, Yinghua Zhao. Experimental study on concentrically-compressed circular concrete filled CFRP-steel composite tubular short columns [J]. Journal of Shenyang Architectural and Civil Engineering University (Natural Science), 2004, 20(2): 118―120. (in Chinese).

[5] Wei Gu, Yinghua Zhao. Experimental study of concentrically compressed circular concrete filled CFRP-steel composite tubular short columns [J]. Journal of Shenyang Architectural and Civil Engineering University (Natural Science), 2004, 2(2): 118~120. (in Chinese).

[6] Qingli Wang, Yan Fang, Qingxin Ren. Study on static performance of concentrically compressed concrete filled circular CFRP steel tubular members [ J ]. China Civil Engineering Jou2rnal, 2008, 41(10): 21-29(in Chinese).

[7] Yinghua Zhao, Wei Gu, Qingli Wang. Experimental study on the compressive strength of concrete filled CFRP-steel columns [C]. Proceedings of the 6th China-Japan-US Joint Conference on Composite Materials (CJAJCC-6). Chongqing, China, 2004: 7―11.

[8] Linhai Han. Concrete filled steel tubular structures [M]. Beijing: Science Press, 2000. (in Chinese).