Smart Structures and Systems

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Embedded smart GFRP reinforcements for monitoring reinforced concrete flexural components

  • Georgiades, Anastasis V. (Mechanical Engineering Department, Dalhousie University) ;
  • Saha, Gobinda C. (Mechanical Engineering Department, Dalhousie University) ;
  • Kalamkarov, Alexander L. (Mechanical Engineering Department, Dalhousie University) ;
  • Rokkam, Srujan K. (Mechanical Engineering Department, Dalhousie University) ;
  • Newhook, John P. (Civil Engineering Department, Dalhousie University) ;
  • Challagulla, Krishna S. (Mechanical Engineering Department, Dalhousie University)
  • Received : 2005.05.24
  • Accepted : 2005.09.20
  • Published : 2005.10.25
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Abstract

The main objectives of this paper are to demonstrate the feasibility of using newly developed smart GFRP reinforcements to effectively monitor reinforced concrete beams subjected to flexural and creep loads, and to develop non-linear numerical models to predict the behavior of these beams. The smart glass fiber-reinforced polymer (GFRP) rebars are fabricated using a modified pultrusion process, which allows the simultaneous embeddement of Fabry-Perot fiber-optic sensors within them. Two beams are subjected to static and repeated loads (until failure), and a third one is under long-term investigation for assessment of its creep behavior. The accuracy and reliability of the strain readings from the embedded sensors are verified by comparison with corresponding readings from surface attached electrical strain gages. Nonlinear finite element modeling of the smart concrete beams is subsequently performed. These models are shown to be effective in predicting various parameters of interest such as crack patterns, failure loads, strains and stresses. The strain values computed by these numerical models agree well with corresponding readings from the embedded fiber-optic sensors.

Keywords

References

  1. ANSYS (2004), ANSYS User's Manual Revision 8.1, Canonsburg, PA.
  2. Canadian Portland Cement Association (1995), Concrete design handbook, 2nd edn.
  3. DeMerchant, M., Brown, A., Smith, J., Bao, X. and Bremner, T. (2000), "Distributed strain sensing for structural monitoring applications", Canadian J. Civ. Eng., 27, 873-879. https://doi.org/10.1139/l00-006
  4. Fanning, P. (2001), "Nonlinear models of reinforced and post-tensioned concrete beams", E. J. Struc. Eng., 2, 111-119.
  5. Feng, Q. M., Suzuki, H. and Yokoi, I. (1995), "Development of optical sensing systems for smart civil infrastructure", Smart Mater. Struct., 4, A114-A120. https://doi.org/10.1088/0964-1726/4/1A/014
  6. Kalamkarov, A. L., Fitzgerald, S., MacDonald, D. and Georgiades, A. V. (1999), "On the processing and evaluation of pultruded smart composites", Comp. Part B: Eng., 30B(2), 167-175.
  7. Kalamkarov, A. L., Georgiades, A. V., MacDonald, D. and Fitzgerald, S (2000a), "Pultruded fiber reinforced polymer reinforcements with embedded fiber optic sensors", Canadian J. Civ. Eng., 27, 972-984. https://doi.org/10.1139/l00-034
  8. Kalamkarov, A. L., Fitzgerald, S., MacDonald, D. and Georgiades, A. V. (2000b), "Mechanical performance of pultruded composite rods with embedded fiber-optic sensors", J. Comp. Sci. Tech., 60, 1171-1179. https://doi.org/10.1016/S0266-3538(00)00022-1
  9. Kalamkarov, A. L., MacDonald, D., Fitzgerald, S. and Georgiades, A. V. (2000c), "Reliability assessment of pultruded FRP reinforcements with embedded fiber-optic sensors", Comp. Struc., 50, 69-78. https://doi.org/10.1016/S0263-8223(00)00081-7
  10. Kalamkarov, A. L., Saha, G. C., Georgiades, A. V., Challagulla, K. and Newhook, J. P. (2004), "Smart FRP reinforcements for long-term health monitoring in Infrastructure", J. Thermoplastic Compo. Mater., 17, 359-381. https://doi.org/10.1177/0892705704045189
  11. Kalamkarov, A. L., Saha, G. C., Rokkam, S., Newhook, J. and Georgiades, A. V. (2005), "Strain and deformation monitoring in infrastructure using embedded smart FRP reinforcements", Composites: Part B, 36, 455-467. https://doi.org/10.1016/j.compositesb.2004.12.003
  12. Kim, K. S., Ryu, J. U., Lee, S.J. and Choi, L. (1997), "In-situ monitoring of Sungsan bridge in Han river with an optical fiber sensor system", SPIE, 3043, 72-76.
  13. Matthews, F. L., Davies, G. A. O., Hitchings, D., and Soutis, C. (2000), Finite Element Modeling of Composite Materials and Structures, CRC Press, Boca Raton.
  14. RocTest Ltd. (2000), Instruction Manual: sensoptic fiber-optic sensors, St-Lambert, QC, Canada.
  15. Tennyson, R. C., Coroy, T., Duck, G., Manuelpillai, G., Mulvihill, P., Cooper, D. J. F., Smith, P. W. E., Mufti, A. A. and Jalali, S. J. (2000), "Fiber optic sensors in civil engineering structures", Canadian J. Civ. Eng., 27, 880-889. https://doi.org/10.1139/l00-010
  16. Tennyson, R. C., Mufti, A. A., Rizkalla, S., Tadros, G. and Benmokrane, B. (2001), "Structural health monitoring of innovative bridges in Canada using fiber optic sensors", Smart Mater. Struct., 10, 560-573. https://doi.org/10.1088/0964-1726/10/3/320
  17. William, K. J. and Warnke, E. D. (1974), "Constitutive model for the triaxial behavior of concrete", Int. Assoc. for Bridge and Structural Engineering, 19, 1-30.

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