Effect of fiber angles on hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns under monotonic axial compression

Abstract

Hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns are a novel form of hollow columns that combine two traditional construction materials (i.e. concrete and steel) with fiber-reinforced polymer composites. Hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns consist of an inner tube made of steel, an outer tube made of fiber-reinforced polymer, and a concrete layer between the two tubes. Existing studies, however, are focused on hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns with fibers of the fiber-reinforced polymer tube oriented in the hoop direction or close to the hoop direction. In order to investigate the effect of fiber angles (i.e. the fiber angle between the fiber orientation and the longitudinal axis of the fiber-reinforced polymer tube), monotonic axial compression tests were conducted on hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns with an fiber-reinforced polymer tube of ±45°, ±60°, or ±80° fiber angles. There were two types of steel tubes adopted for these hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns. The fiber-reinforced polymer tube thickness was also investigated as an important parameter. Experimental results showed that the confinement effect of the fiber-reinforced polymer tube increased with the increase of the absolute value of fiber angles, whereas the ultimate axial strain of hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns decreased with the increase of the absolute value of fiber angles. An existing stress–strain model, which was developed on the basis of hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns with an fiber-reinforced polymer tube of ±90° fiber angles, is verified using the test results of this study. For the compressive strength of the confined concrete in hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns, the existing model provides conservative predictions for specimens with a ±80° fiber-reinforced polymer tube, overestimated predictions for specimens with a ±60° fiber-reinforced polymer tube, and close predictions for specimens with a ±45° fiber-reinforced polymer tube.

Keywords

confinement double-skin columns fiber angles fiber-reinforced polymer hybrid columns tubular columns

Get full access to this article

View all access options for this article.

References

ASTM C39/C39M (2008) Standard test method for compressive strength of cylindrical concrete specimens.

ASTM D2290-08 (2008) Standard test method for apparent hoop tensile strength of plastic or reinforced plastic pipe by split disk method.

Bank

(2006) Composites for Construction: Structural Design with FRP Materials. Chichester: John Wiley & Sons.

BS 18 (1987) Tensile Testing of Metals (Including Aerospace Materials). London: British Standards Institution.

Fam

Rizkalla

(2001) Behavior of axially loaded concrete-filled circular fiber reinforced polymer tubes. ACI Structural Journal 98(3): 280–289.

Fanggi

BAL

Ozbakkaloglu

(2013) Compressive behavior of aramid FRP-HSC-steel double-skin tubular columns. Construction and Building Materials 48: 554–565.

GB/T 5350-2005 (2005) Fiber-reinforced thermosetting plastic composites pipe: determination for longitudinal compressive properties.

GB 50608 (2010) Technical code for infrastructure application of FRP composites.

Hollaway

Teng

(2008) Strengthening and Rehabilitation of Civil Infrastructures Using Fibre-reinforced Polymer (FRP) Composites. Cambridge: Woodhead Publishing.

10.

Lam

Teng

(2003) Design-oriented stress-strain model for FRP-confined concrete. Construction and Building Materials 17(6): 471–489.

11.

Motavalli

Czaderski

(2007) FRP composites for retrofitting of existing civil structures in Europe: state-of-the-art review. In: Proceedings of the international conference of composites and polycon, Tampa, FL, 17–19 October, pp. 1–10. Arlington, VA: American Composites Manufacturers Association.

12.

Ozbakkaloglu

Akin

(2012) Behavior of FRP-confined normal-and high-strength concrete under cyclic axial compression. Journal of Composites for Construction 16: 451–463.

13.

Ozbakkaloglu

Fanggi

BAL

(2013) FRP-HSC-steel composite columns: behavior under monotonic and cyclic axial compression. Materials and Structures 48: 1075–1093.

14.

Peng

Muhammad

, et al. (2018) Compressive behavior of hybrid double-skin tubular columns with a rib-stiffened steel inner tube. Composite Structures 204: 634–644.

15.

Teng

(2008) New-material hybrid structures. China Civil Engineering Journal 51(12): 1–11 (in Chinese).

16.

Teng

Wong

(2004) Behaviour of hybrid FRP-concrete-steel double-skin tubular columns. In: Proceedings of the second international conference on FRP composites in civil engineering, Adelaide, SA, Australia, 8–10 December, pp. 811–818. London: A.A. Balkema.

17.

Teng

Wong

, et al. (2007) Hybrid FRP-concrete-steel tubular columns: concept and behavior. Construction and Building Materials 21(4): 846–854.

18.

Wang

Cai

, et al. (2019) Behavior of circular fiber-reinforced polymer–steel-confined concrete columns subjected to reversed cyclic loads: experimental studies and finite-element analysis. Journal of Structural Engineering 145(9): 04019085.

19.

(2007) Behavior of hybrid FRP-concrete-steel double-skin tubular columns. PhD Thesis, The Hong Kong Polytechnic University, Kowloon, Hong Kong.

20.

Teng

Wong

(2010) Stress-strain behavior of concrete in hybrid double-skin tubular columns. Journal of Structural Engineering 136(4): 379–389.

21.

Zhang

Cao

, et al. (2012) Behavior of hybrid FRP-concrete-steel double-skin tubular columns subjected to cyclic axial compression. Thin-Walled Structures 61: 196–203.

22.

Zhang

Huang

, et al. (2017) Compressive behavior of hybrid double-skin tubular columns with a large rupture strain FRP tube. Composite Structures 171: 10–18.

23.

Zeng

, et al. (2018) Compressive test of GFRP-recycled aggregated concrete-steel tubular long columns. Construction and Building Materials 176: 295–312.

24.

Zhang

Zhao

, et al. (2020) Effect of fiber angles on normal- and high-strength concrete-filled fiber-reinforced polymer tubes under monotonic axial compression. Advances in Structural Engineering 23(5): 924–940. DOI: 10.1177/1369433219886082.

25.

Zhang

Teng

(2012) Hybrid double-skin tubular columns filled with high strength concrete under axial monotonic compression. In: Proceedings of the ACUN-composites and nanocomposites in civil, offshore and mining infrastructure, Melbourne, VIC, Australia, 14–16 November, pp. 89–94. Clayton, VIC, Australia: ACUN-6.

26.

Zhang

Teng

(2015) Experimental behavior of hybrid FRP-concrete-steel double-skin tubular columns under combined axial compression and cyclic lateral loading. Engineering Structures 99: 214–231.

27.

Zhang

Teng

(2017) Compressive behavior of double-skin tubular columns with high-strength concrete and a filament-wound FRP tube. Journal of Composites for Construction 21: 04017029.

28.

Zhang

Teng

(2011) Axial compression tests on hybrid double-skin tubular columns filled with high strength concrete. In: Proceedings of the third international postgraduate conference on infrastructure and environment, Hong Kong, China, 11–12 July, pp. 171–176. Hong Kong, China: Faculty of Construction and Land Use, Hong Kong Polytechnic University.

29.

Zhao

Teng

(2016) Behavior of large-scale hybrid FRP-concrete-steel double-skin tubular beams with shear connectors. Journal of Composite of Construction 20(5): 04016015.

30.

Zhou

Liu

Xing

, et al. (2017) Behavior and modeling of FRP-concrete-steel double-skin tubular columns made of full lightweight aggregate concrete. Construction and Building Materials 139: 52–63.