Behavior of Hybrid FRP-Concrete-Steel Double-Skin Tubular Columns with a Square Outer Tube and a Circular Inner Tube Subjected to Axial Compression
Publication: Journal of Composites for Construction
Volume 17, Issue 2
Abstract
Hybrid fiber-reinforced polymer (FRP) concrete steel, double skin tubular columns (DSTCs) are a new form of hybrid columns. The most common sectional form of hybrid DSTCs consists of a layer of concrete sandwiched between a circular inner steel tube and a circular outer FRP tube whose fiber directions are close to the hoop detection to provide effective confinement to the concrete. Much recent research has been conducted on circular hybrid DSTCs, which has demonstrated that the combination of the three constituent materials leads to several advantages not available with existing forms of columns. In practical applications, for aesthetic and other reasons, square hybrid DSTCs may be needed. This paper thus extends the existing work on circular hybrid DSTCs to square hybrid DSTCs in which the outer FRP tube is square while the inner steel tube is still circular. Results from a series of axial compression tests are presented and interpreted to examine the compressive behavior of square hybrid DSTCs. In these tests, FRP tubes formed through a wet-layup process were used instead of filament-wound FRP tubes because the latter were not readily available to the authors at the time of the study. The test results show that the concrete in these square hybrid DSTCs is effectively confined by the two tubes, and the behavior of the confined concrete is similar to that of concrete in FRP-confined solid columns. A stress-strain model for concrete in square hybrid DSTCs is also proposed and is shown to provide reasonably accurate predictions of the test results.
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Acknowledgments
The authors gratefully acknowledge the financial support provided by the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. PolyU 5278/07E); the Science Technology Department of Zhejiang Province, China (Grant No. 2009C14006); and The Hong Kong Polytechnic University. The authors also wish to thank Miss Chan Pak Yan for her valuable contribution to the experimental work.
References
American Concrete Institute (ACI). (2008). “Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures.”, Committee 440, Detroit, MI.
ASTM. (2010). “Standard test method for determining tensile properties of fiber reinforced polymer matrix composites used for strengthening of civil structures.” ASTM D7565/D7565M, Committee D30, West Conshohoken, PA.
British Standards Institution. (1987). “Tensile testing of metals (including aerospace materials).”, London.
Burgueno, R., Davol, A., Zhao, L., Seible, F., and Karbhari, V. M. (2004). “Flexural behavior of hybrid fiber-reinforced polymer/concrete beam/slab bridge component.” ACI Struct. J., 101(2), 228–236.
China Planning Press. (2010). “Code for infrastructure application of FRP composites.”, Beijing, China.
Fam, A. Z., and Rizkalla, S. H. (2001a). “Behavior of axially loaded concrete-filled circular fiber reinforced polymer tubes.” ACI Struct. J., 98(3), 280–289.
Fam, A. Z., and Rizkalla, S. H. (2001b). “Confinement model for axially loaded concrete confined by circular fiber-reinforced polymer tubes.” ACI Struct. J., 98(4), 451–461.
Fam, A., Schnerch, D., and Rizkalla, S. (2005). “Rectangular filament-wound GFRP tubes filled with concrete under flexural and axial loading: experimental investigation.” J. Compos. Constr., 9(1), 25–33.
Han, L. H., Tao, Z., Liao, F. Y., and Xu, Y. (2010). “Tests on cyclic performance of FRP-concrete-steel double-skin tubular columns.” Thin-Walled Struct., 48(6), 430–439.
Hollaway, L. C., and Teng, J. G., eds. (2008). Strengthening and rehabilitation of civil infrastructures using FRP composites, Woodhead, Cambridge, U.K.
Jiang, T., and Teng, J. G. (2007). “Analysis-oriented stress-strain models for FRP-confined concrete.” Eng. Struct., 29(11), 2968–2986.
Lam, L., and Teng, J. G. (2003a). “Design-oriented stress-strain model for FRP-confined concrete.” Constr. Build. Mater., 17(6–7), 471–489.
Lam, L., and Teng, J. G. (2003b). “Design-oriented stress-strain model for FRP-confined concrete in rectangular columns.” J. Reinf. Plast. Compos., 22(13), 1149–1186.
Liu, M. X. (2007). “Studies on key behavior of FRP-concrete-steel double skin tubular columns.” Ph.D. thesis, Tsinghua Univ., Beijing, China (in Chinese).
Mirmiran, A. (2003). “Stay-in-place FRP form for concrete columns.” Adv. Struct. Eng., 6(3), 231–241.
Mirmiran, A., Shahawy, M., Samaan, M., Echary, H. E., Mastrapa, J. C., and Pico, O. (1998). “Effect of column parameters on FRP-confined concrete.” J. Compos. Constr., 2(4), 583–590.
Nordin, H., and Taljsten, B. (2004). “Testing of hybrid FRP composite beams in bending.” Compos. Part B: Eng., 35(1), 27–33.
Shahawy, M., Mirmiran, A., and Beitelman, T. (2000). “Tests and modeling of carbon-wrapped concrete columns.” Compos. Part B: Eng., 31(6–7), 471–480.
Teng, J. G., Chen, J. F., Smith, S. T., and Lam, L. (2002). FRP-strengthened RC structures, John Wiley and Sons, West Sussex, U.K.
Teng, J. G., Jiang, T., Lam, L., and Luo, Y. Z. (2009). “Refinement of a design-oriented stress-strain model for FRP-confined concrete.” J. Compos. Constr., 13(4), 269–278.
Teng, J. G., Yu, T., and Wong, Y. L. (2004). “Behavior of hybrid FRP-concrete-steel double-skin tubular columns.” Proc., 2nd Int. Conf. on FRP Composites in Civil Engineering, Taylor & Francis, Melbourne, Australia, 811–818.
Teng, J. G., Yu, T., Wong, Y. L., and Dong, S. L. (2007). “Hybrid FRP-concrete-steel tubular columns: Concept and behavior.” Constr. Build. Mater., 21(4), 846–854.
Wong, Y. L., Yu, T., Teng, J. G., and Dong, S. L. (2008). “Behavior of FRP confined concrete in annular section columns.” Compos. Part B: Eng., 39(3), 451–466.
Xu, Y., and Tao, Z. (2005). “Key issues of dynamic behavior of hybrid FRP-concrete-steel double skin tubular columns.” J. Fuzhou Univ. (Nat. Sci.), 33(S1), 309–315 (in Chinese).
Yu, T. (2007). “Behavior of hybrid FRP-concrete-steel double-skin tubular columns.” Ph.D. thesis, The Hong Kong Polytechnic Univ., Hong Kong, China.
Yu, T., Teng, J. G., and Wong, Y. L. (2010a). “Behavior of hybrid FRP-concrete-steel double-skin tubular columns subjected to eccentric compression.” Adv. Struct. Eng., 13(5), 961–974.
Yu, T., Teng, J. G., and Wong, Y. L. (2010b). “Stress-strain behavior of concrete in hybrid double-skin tubular columns.” J. Struct. Eng., 136(4), 379–389.
Yu, T., Teng, J. G., Wong, Y. L., and Dong, S. L. (2010c). “Finite element modeling of confined concrete-I: Drucker-Prager type plasticity model.” Eng. Struct., 32(3), 665–679.
Yu, T., Teng, J. G., Wong, Y. L., and Dong, S. L. (2010d). “Finite element modeling of confined concrete-II: Plastic-damage model.” Eng. Struct., 32(3), 680–691.
Yu, T., Wong, Y. L., Teng, J. G., Dong, S. L., and Lam, S. S. (2006). “Flexural behaviour of hybrid FRP-concrete-steel double skin tubular members.” J. Compos. Constr., 10(5), 443–452.
Yu, X. W. (2006). “Behavior of hybrid CFRP-concrete-steel double-skin tubular columns under axial compression.” M.Sc. thesis, Harbin Institute of Technology, Shenzhen, China (in Chinese).
Zhang, B., Teng, J. G., and Yu, T. (2012). “Behaviour of hybrid double-skin tubular columns subjected to combined axial compression and cyclic lateral loading.” Proc., 6th Int. Conf. on FRP Composites in Civil Engineering, Rome, Italy, 13–15 June.
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© 2013 American Society of Civil Engineers.
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Received: Sep 29, 2011
Accepted: Sep 7, 2012
Published online: Sep 10, 2012
Published in print: Apr 1, 2013
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