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Evaluation of Kinetic and Viscosity Based Parameters for Fiber Reinforced Composite Rebars at Elevated Temperatures: A Parametric Study

Received: 22 July 2014     Accepted: 31 July 2014     Published: 10 August 2014
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Abstract

Fiber reinforced polymer (FRP) composites are high performing materials and offer a wide range of applications. This has led to an increased use of FRP rebars in new construction with concrete as an alternative to steel in buildings. In building applications, FRP rebars need to conform to fire endurance ratings. Unfortunately, there has been very limited effort for understanding the fire endurance of FRP rebars in concrete structures. This limited effort is only available for glass conversion (kinetic parameter) in the glassy state. There is none available for decomposed state (kinetic parameter) and viscosity based parameters influencing the fire endurance of FRP rebars. Moreover, understanding the fire endurance of FRP composite rebars through the standard fire tests is expensive and time consuming. Therefore, this research makes an attempt to develop models that incorporate various transition states of FRP rebars at elevated temperatures to study kinetic and viscosity based parameters. The kinetic parameter in the glassy state is compared with a limitedly available approach in literature. In addition, a parametric study involving decomposed state, and viscosity based parameters in rubbery and leathery states is also carried out to provide some understanding of rebars endurance in fire. A basic understanding is obtained. In order to highlight basic implications on design approaches, a design model is also developed that incorporates the useful transition states in predicting the creep behavior of FRP reinforced concrete structures. This model can serve as a first step in the future design approaches for the construction industry in an economical way.

Published in American Journal of Mechanics and Applications (Volume 2, Issue 3)
DOI 10.11648/j.ajma.20140203.11
Page(s) 14-20
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2014. Published by Science Publishing Group

Keywords

FRP, Elevated Temperatures, Kinetic, Viscosity, Transition States

References
[1] Keller, T.; Tray, C.; Zhou, A. Structural Response of liquid-cooled GFRP slabs subjected to fire. Part I: Material and post-fire modeling, Composites Part A. 2006, 37(9), 1286-95.
[2] T. Keller, C. Tray, and A. Zhou, Structural Response of liquid-cooled GFRP slabs subjected to fire. Part II: Thermo chemical and thermo-mechanical modeling, Composites Part A. 2006, 37(9), 1296-1308.
[3] Dao, M.; Asaro, R. A study on the failure prediction and the design criteria for fiber composites under fire degradation, Composites Part A. 1999, 30(2), 123-31.
[4] Bausamo, J.; Boyd, J.; Lesko, J.; Case, S.W. Composite life under sustained compression and one-sided simulated fire exposure: Characterization and prediction, Proceedings of the International SAMPE Symposium, Long Beach, USA, 2004.
[5] Halverson, H.; Bausano, J.; Case, S.W.; Lesko, J. Simulation of response of composite structures under fire exposure, Proceedings of the International SAMPE Symposium, Long Beach, USA, 2004.
[6] Bai, Y.; Keller, T,; Valle, T. Modeling of stiffness of FRP composites under and high Temperatures, Composites Science and Technology, 2008, 68, 3099-3106.
[7] Davis, R.E. Modern Chemistry, Harcourt Brace & Company, Boston, MA, 1999.
[8] Bai, Y.; Valle, T.; Keller, T. Modeling of thermo-physical properties for FRP composites under elevated and high temperatures, Composites Science and Technology, 2007, 67(15-16), 3098-109.
[9] Mahieux, C. A.; Reifsnider, K.L. Property modeling across transition temperatures in polymers: a robust stiffness--temperature model, Polymer, 2001, 42, 3281-91.
[10] Schapery, R. Thermal expansion co-efficients of composite materials based on energy principles, Journal of Composites Material, 1968, 2(3), 380-404.
[11] Katz, N.; Berman, N.; Blank, L. Effect of high temperature on bond strength of FRP rebars, Journal of Composites for Construction, 1999, 3(2), 73-81.
[12] Mahieux, C. A. A systematic stiffness-temperature model for polymers and applications to the prediction of composite behavior, Ph.D., dissertation, Virginia Polytechnic Institute and State University; 1999.
[13] Mahieux, C.A.; Reifsnider. K.L. Property modeling across transition temperatures in polymers: application to thermoplastic systems, Journal of Material Science, 2002, 37, 911-20.
[14] Hawileh, R. a.; Naser, M.Z. Thermal-stress analysis of reinforced concrete with GFRP bars, Composites Par B: Engineering, 2012, 43(5), 2135-2142.
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  • APA Style

    Mohammed Faruqi, Sumon Roy, Francisco Aguiniga, Joseph Sai. (2014). Evaluation of Kinetic and Viscosity Based Parameters for Fiber Reinforced Composite Rebars at Elevated Temperatures: A Parametric Study. American Journal of Mechanics and Applications, 2(3), 14-20. https://doi.org/10.11648/j.ajma.20140203.11

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    ACS Style

    Mohammed Faruqi; Sumon Roy; Francisco Aguiniga; Joseph Sai. Evaluation of Kinetic and Viscosity Based Parameters for Fiber Reinforced Composite Rebars at Elevated Temperatures: A Parametric Study. Am. J. Mech. Appl. 2014, 2(3), 14-20. doi: 10.11648/j.ajma.20140203.11

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    AMA Style

    Mohammed Faruqi, Sumon Roy, Francisco Aguiniga, Joseph Sai. Evaluation of Kinetic and Viscosity Based Parameters for Fiber Reinforced Composite Rebars at Elevated Temperatures: A Parametric Study. Am J Mech Appl. 2014;2(3):14-20. doi: 10.11648/j.ajma.20140203.11

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  • @article{10.11648/j.ajma.20140203.11,
      author = {Mohammed Faruqi and Sumon Roy and Francisco Aguiniga and Joseph Sai},
      title = {Evaluation of Kinetic and Viscosity Based Parameters for Fiber Reinforced Composite Rebars at Elevated Temperatures: A Parametric Study},
      journal = {American Journal of Mechanics and Applications},
      volume = {2},
      number = {3},
      pages = {14-20},
      doi = {10.11648/j.ajma.20140203.11},
      url = {https://doi.org/10.11648/j.ajma.20140203.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajma.20140203.11},
      abstract = {Fiber reinforced polymer (FRP) composites are high performing materials and offer a wide range of applications. This has led to an increased use of FRP rebars in new construction with concrete as an alternative to steel in buildings. In building applications, FRP rebars need to conform to fire endurance ratings. Unfortunately, there has been very limited effort for understanding the fire endurance of FRP rebars in concrete structures. This limited effort is only available for glass conversion (kinetic parameter) in the glassy state. There is none available for decomposed state (kinetic parameter) and viscosity based parameters influencing the fire endurance of FRP rebars. Moreover, understanding the fire endurance of FRP composite rebars through the standard fire tests is expensive and time consuming. Therefore, this research makes an attempt to develop models that incorporate various transition states of FRP rebars at elevated temperatures to study kinetic and viscosity based parameters. The kinetic parameter in the glassy state is compared with a limitedly available approach in literature. In addition, a parametric study involving decomposed state, and viscosity based parameters in rubbery and leathery states is also carried out to provide some understanding of rebars endurance in fire. A basic understanding is obtained. In order to highlight basic implications on design approaches, a design model is also developed that incorporates the useful transition states in predicting the creep behavior of FRP reinforced concrete structures. This model can serve as a first step in the future design approaches for the construction industry in an economical way.},
     year = {2014}
    }
    

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  • TY  - JOUR
    T1  - Evaluation of Kinetic and Viscosity Based Parameters for Fiber Reinforced Composite Rebars at Elevated Temperatures: A Parametric Study
    AU  - Mohammed Faruqi
    AU  - Sumon Roy
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    AU  - Joseph Sai
    Y1  - 2014/08/10
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    DO  - 10.11648/j.ajma.20140203.11
    T2  - American Journal of Mechanics and Applications
    JF  - American Journal of Mechanics and Applications
    JO  - American Journal of Mechanics and Applications
    SP  - 14
    EP  - 20
    PB  - Science Publishing Group
    SN  - 2376-6131
    UR  - https://doi.org/10.11648/j.ajma.20140203.11
    AB  - Fiber reinforced polymer (FRP) composites are high performing materials and offer a wide range of applications. This has led to an increased use of FRP rebars in new construction with concrete as an alternative to steel in buildings. In building applications, FRP rebars need to conform to fire endurance ratings. Unfortunately, there has been very limited effort for understanding the fire endurance of FRP rebars in concrete structures. This limited effort is only available for glass conversion (kinetic parameter) in the glassy state. There is none available for decomposed state (kinetic parameter) and viscosity based parameters influencing the fire endurance of FRP rebars. Moreover, understanding the fire endurance of FRP composite rebars through the standard fire tests is expensive and time consuming. Therefore, this research makes an attempt to develop models that incorporate various transition states of FRP rebars at elevated temperatures to study kinetic and viscosity based parameters. The kinetic parameter in the glassy state is compared with a limitedly available approach in literature. In addition, a parametric study involving decomposed state, and viscosity based parameters in rubbery and leathery states is also carried out to provide some understanding of rebars endurance in fire. A basic understanding is obtained. In order to highlight basic implications on design approaches, a design model is also developed that incorporates the useful transition states in predicting the creep behavior of FRP reinforced concrete structures. This model can serve as a first step in the future design approaches for the construction industry in an economical way.
    VL  - 2
    IS  - 3
    ER  - 

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Author Information
  • Department of Civil and Architectural Engineering, MSC 194, Texas A&M University-Kingsville, Kingsville, TX 78363, USA

  • Department of Civil and Architectural Engineering, MSC 194, Texas A&M University-Kingsville, Kingsville, TX 78363, USA

  • Department of Civil and Architectural Engineering, MSC 194, Texas A&M University-Kingsville, Kingsville, TX 78363, USA

  • Department of Civil and Architectural Engineering, MSC 194, Texas A&M University-Kingsville, Kingsville, TX 78363, USA

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