How Concrete Filling Fundamentally Changes Stress–Strain Curve of Angle-Ply FRP Tubes in Tension
Publication: Journal of Composites for Construction
Volume 26, Issue 5
Abstract
Angle-ply (±55°) fiber-reinforced polymer (FRP) tubes are widely available and have been used in concrete-filled FRP tube (CFFT) members. Two observations have been reported regarding the behavior of these tubes in tension: a remarkably nonlinear stress–strain response and a significant increase in their tensile strength and stiffness when filled with concrete. To better understand these phenomena, a robust finite-element model is developed using LS DYNA software and validated against a diverse experimental database. It showed that the nonlinear behavior of the tube is mainly due to matrix cracking perpendicular to the fibers and to a lesser extent due to in-plane shear along diagonal bands. Concrete filling restrains the large radial and circumferential contraction of the hollow tube under longitudinal tension, thereby generating significant hoop tensile stresses and consequently a state of biaxial tensile stress. A failure envelope under such stress combination was developed and far exceeded uniaxial strength in either direction. A parametric study was performed on 68 new models with various properties. The longitudinal tensile strength (σmax) of CFFT tubes with fiber angles (θ) relative to longitudinal axis of 35°, 45°, 55°, 65°, and 75° increased 2.9, 4.1, 3.3, 2.8, and 1.4 times, respectively, that of hollow counterparts. Design-oriented equations were developed to represent the enhanced longitudinal bilinear stress–strain curve when the tube is filled with concrete. It can be used for flexural strength calculations of CFFTs, which would otherwise be grossly underestimated if calculated using hollow tube properties reported by the manufacturer or established from longitudinal coupon tests or from classical lamination theory.
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Acknowledgments
The authors wish to acknowledge the financial support provided by the MITACS Elevate program and NSERC Discovery grant program.
References
Abdelkarim, O. I., and M. ElGawady. 2015. “Concrete-filled-large deformable FRP tubular columns under axial compressive loading.” Fibers 3 (4): 432–449. https://doi.org/10.3390/fib3040432.
ACI (American Concrete Institute). 2019. Building code requirements for structural concrete (ACI 318-19) and commentary on building code requirements for structural concrete. Farmington Hills, MI: ACI.
Ashraf, M. A., E. V. Morozov, and K. Shankar. 2014. “Flexure analysis of spoolable reinforced thermoplastic pipes for offshore oil and gas applications.” J. Reinf. Plast. Compos. 33 (6): 533–542. https://doi.org/10.1177/0731684413491442.
ASTM. 2020. Standard test method for shear properties of composite materials by V-notched rail shear method. ASTM D7078. West Conshohocken, PA: ASTM.
Bai, J. B., G. K. Hu, and P. Bompard. 1997a. “Mechanical behaviour of ±55° filament-wound glass-fibre/epoxy-resin tubes: II. Micromechanical model of damage initiation and the competition between different mechanisms.” Compos. Sci. Technol. 57 (2): 155–164. https://doi.org/10.1016/S0266-3538(96)00125-X.
Bai, J. B., P. Seeleuthner, and P. Bompard. 1997b. “Mechanical behaviour of ±55° filament-wound glass-fibre/epoxy-resin tubes: I. Microstructural analyses, mechanical behaviour and damage mechanisms of composite tubes under pure tensile loading, pure internal pressure, and combined loading.” Compos. Sci. Technol. 57 (2): 141–153. https://doi.org/10.1016/S0266-3538(96)00124-8.
Benzarti, K., L. Cangemi, and F. D. Dal Maso. 2001. “Transverse properties of unidirectional glass/epoxy composites: Influence of fibre surface treatments.” Composites, Part A 32 (2): 197–206. https://doi.org/10.1016/S1359-835X(00)00136-6.
Betts, D., P. Sadeghian, and A. Fam. 2019. “Investigation of the stress-strain constitutive behavior of ±55° filament wound GFRP pipes in compression and tension.” Composites, Part B 172: 243–252. https://doi.org/10.1016/j.compositesb.2019.05.077.
Betts, D., P. Sadeghian, and A. Fam. 2021. “Experimental and analytical investigations of the flexural behavior of hollow ±55° filament wound GFRP tubes.” Thin-Walled Struct. 159: 107246. https://doi.org/10.1016/j.tws.2020.107246.
Carroll, M., F. Ellyin, D. Kujawski, and A. S. Chiu. 1995. “The rate-dependent behaviour of ±55° filament-wound glass-fibre/epoxy tubes under biaxial loading.” Compos. Sci. Technol. 55 (4): 391–403. https://doi.org/10.1016/0266-3538(95)00119-0.
Cherniaev, A., J. Montesano, and C. Butcher. 2018. “Modeling the axial crush response of CFRP tubes using MAT054, MAT058 and MAT262 in LS-DYNA.” In Proc., 15th Int. LS-DYNA Users Conf., 1–17. Dublin, OH: DYNAmore.
Elsanadedy, H. M., Y. A. Al-Salloum, S. H. Alsayed, and R. A. Iqbal. 2012. “Experimental and numerical investigation of size effects in FRP-wrapped concrete columns.” Constr. Build. Mater. 29: 56–72. https://doi.org/10.1016/j.conbuildmat.2011.10.025.
Fam, A., R. Greene, and S. Rizkalla. 2003a. “Field applications of concrete filled FRP tubes for marine piles.” ACI Spec. Publ. 48 (3): 161–180.
Fam, A., M. Pando, G. Filz, and S. Rizkalla. 2003b. “Precast piles for route 40 bridge in Virginia using concrete filled FRP tubes.” PCI J. 48 (3): 32–45. https://doi.org/10.15554/pcij.05012003.32.45.
Feraboli, P., B. Wade, F. Deleo, M. Rassaian, M. Higgins, and A. Byar. 2011. “LS-DYNA MAT54 modeling of the axial crushing of a composite tape sinusoidal specimen.” Composites, Part A 42 (11): 1809–1825. https://doi.org/10.1016/j.compositesa.2011.08.004.
Hollaway, L. C., and M. B. Leeming. 2000. Strengthening of reinforced concrete structures using externally bonded FRP composites in structural and civil engineering. Boca Raton, FL: CRC Press.
Ibrahim, S., D. Polyzois, and S. Hassan. 2000. “Development of glass fiber reinforced plastic poles for transmission and distribution lines.” Can. J. Civ. Eng. 27 (5): 850–858. https://doi.org/10.1139/l99-089.
Jackson, K. E., E. L. Fasanella, and J. D. Littell. 2017. Development of a continuum damage mechanics material model of a graphite-Kevlar hybrid fabric for simulating the impact response of energy absorbing subfloor concepts. Fort Worth, TX: NASA.
Jawdhari, A., A. Adheem, and M. Kadhim. 2020. “Parametric 3D finite element analysis of FRCM-confined RC columns under eccentric loading.” Eng. Struct. 212: 110504. https://doi.org/10.1016/j.engstruct.2020.110504.
Jawdhari, A., and A. Fam. 2018. “Numerical study on mechanical and adhesive splices for ribbed GFRP plates used in concrete beams.” Eng. Struct. 174: 478–494. https://doi.org/10.1016/j.engstruct.2018.07.085.
Jawdhari, A., and A. Fam. 2020. “A new studded precast concrete sandwich wall with embedded glass-fiber-reinforced polymer channel sections: Part 2, finite element analysis and parametric studies.” PCI J. 65 (4): 51–70. https://doi.org/10.15554/pcij65.4-02.
Jawdhari, A., A. Fam, and P. Sadeghian. 2021. “Modeling the nonlinear response of ±55° angle-ply GFRP tube used in CFFT applications.” Proc., 8th Int. Conf. Advanced Composite Materials in Bridges and Structures. Sherbrooke, QC: University of Sherbrooke.
Khalifa, A. B., M. Zidi, and L. Abdelwahed. 2012. “Mechanical characterization of glass/vinylester ±55° filament wound pipes by acoustic emission under axial monotonic loading.” C. R. Méc. 340 (6): 453–460. https://doi.org/10.1016/j.crme.2012.02.006.
Khan, S. 2020. Structural properties of commercially used ±55° filament wound GFRP pipes filled with concrete in tension. Technical Co-op Report submitted to the Dept. of Civil and Resource Engineering. Halifax, NS, Canada: Dalhousie Univ.
Khorramian, K., and P. Sadeghian. 2021. “New mechanics-based confinement model and stress-strain relationship for analysis and design of concrete columns wrapped with FRP composites.” Structures 33: 2659–2674.
Littell, J. D., C. R. Ruggeri, R. K. Goldberg, G. D. Roberts, W. A. Arnold, and W. K. Binienda. 2008. “Measurement of epoxy resin tension, compression, and shear stress–strain curves over a wide range of strain rates using small test specimens.” J. Aerosp. Eng. 21 (3): 162–173. https://doi.org/10.1061/(ASCE)0893-1321(2008)21:3(162).
LSTC (Livermore Software Technology Corporation). 2007. LS-DYNA User’s Keyword Manual, vol. 1. Version 971. Livermore, CA: LSTC.
Lu, C., and A. Fam. 2020. “The effect of tube damage on flexural strength of ±55° angle-ply concrete-filled FRP tubes.” Constr. Build. Mater. 240: 117948. https://doi.org/10.1016/j.conbuildmat.2019.117948.
Lu, C., J. St. Onge, and A. Fam. 2020. “Damage threshold of near-cross-ply tubes used in concrete-filled FRP tubes loaded in flexure.” J. Compos. Constr. 24 (2): 04019063. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000990.
Mandal, S., and A. Fam. 2006. “Modeling of prestressed concrete-filled circular composite tubes subjected to bending and axial loads.” J. Struct. Eng. 132 (3): 449–459. https://doi.org/10.1061/(ASCE)0733-9445(2006)132:3(449).
Mitchell, J., and A. Fam. 2010. “Tests and analysis of cantilevered GFRP tubular poles with partial concrete filling.” J. Compos. Constr. 14 (1): 115–124. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000041.
Olivares, G., J. F. Acosta, V. Yadav, S. Keshavarayana, and A. Abramowitz. 2011. “Crashworthiness of composites structures – Coupon level material model development.” In FAA JAMS 2011 Technical Review Meeting. Wichita, KS: Wichita State University.
Pantelides, C. P., and Z. Yan. 2007. “Confinement model of concrete with externally bonded FRP jackets or posttensioned FRP shells.” J. Struct. Eng. 133 (9): 1288–1296. https://doi.org/10.1061/(ASCE)0733-9445(2007)133:9(1288).
Polanco, M. A., S. Kellas, and K. E. Jackson. 2009. “Evaluation of material models within LS-DYNA for a Kevlar®/epoxy composite honeycomb.” Proc., 65th AHS Forum. Alexandria, VA: American Helicopter Society.
Puck, A., and M. Mannigel. 2007. “Physically based non-linear stress-strain relations for the inter-fibre fracture analysis of FRP laminates.” Compos. Sci. Technol. 67 (9): 1955–1964. https://doi.org/10.1016/j.compscitech.2006.10.008.
Rafiee, R. 2016. “On the mechanical performance of glass-fibre-reinforced thermosetting-resin pipes: A review.” Compos. Struct. 143: 151–164. https://doi.org/10.1016/j.compstruct.2016.02.037.
Richard, R. M., and B. J. Abbott. 1975. “Versatile elastic-plastic stress-strain formula.” J. Eng. Mech. Div. 101 (4): 511–515. https://doi.org/10.1061/JMCEA3.0002047.
Shao, Y., and A. Mirmiran. 2005. “Experimental investigation of cyclic behavior of concrete-filled fiber reinforced polymer tubes.” J. Compos. Constr. 9 (3): 263–273. https://doi.org/10.1061/(ASCE)1090-0268(2005)9:3(263).
Soden, P. D., R. Kitching, P. C. Tse, Y. Tsavalas, and M. J. Hinton. 1993. “Influence of winding angle on the strength and deformation of filament-wound composite tubes subjected to uniaxial and biaxial loads.” Compos. Sci. Technol. 46 (4): 363–378. https://doi.org/10.1016/0266-3538(93)90182-G.
Son, J. K., and A. Fam. 2008. “Finite element modeling of hollow and concrete-filled fiber composite tubes in flexure: Model development, verification and investigation of tube parameters.” Eng. Struct. 30 (10): 2656–2666. https://doi.org/10.1016/j.engstruct.2008.02.014.
Tomblin, J., J. McKenna, Y. Ng, and K. S. Raju. 2001. B-Basis Design Allowables for Epoxy – Based Prepreg Newport E-Glass Fabric 7781/NB321. Advanced General Aviation Transport Experiments (AGATE)-WP3.3-033051-097. Wichita, KS: National Institute for Aviation Research Wichita State Univ.
Wu, Y. F., and Y. Wei. 2015. “General stress-strain model for steel- and FRP-confined concrete.” J. Compos. Constr. 19 (4): 04014069. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000511.
Xie, P., G. Lin, J. G. Teng, and T. Jiang. 2020. “Modelling of concrete-filled filament-wound FRP confining tubes considering nonlinear biaxial tube behavior.” Eng. Struct. 218: 110762. https://doi.org/10.1016/j.engstruct.2020.110762.
Youssf, O., M. A. ElGawady, J. E. Mills, and X. Ma. 2014. “Finite element modelling and dilation of FRP-confined concrete columns.” Eng. Struct. 79: 70–85. https://doi.org/10.1016/j.engstruct.2014.07.045.
Zakaib, S., and A. Fam. 2012. “Flexural performance and moment connection of concrete-filled GFRP tube–encased steel I-sections.” J. Compos. Constr. 16 (5): 604–613. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000288.
Zheng, X. 2006. “Nonlinear strain rate dependent composite model for explicit finite element analysis.” Ph.D. thesis, Dept. of Civil Engineering, Univ. of Akron.
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Published In
Journal of Composites for Construction
Volume 26 • Issue 5 • October 2022
Copyright
© 2022 American Society of Civil Engineers.
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Received: Oct 22, 2021
Accepted: May 17, 2022
Published online: Aug 8, 2022
Published in print: Oct 1, 2022
Discussion open until: Jan 8, 2023
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