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International journal of concrete structures and materials v.4 no.1, 2010년, pp.25 - 36   피인용횟수: 2
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Interpreting Conservativeness in Design Criteria for Flexural Strengthening of RC Structures Using Externally Bonded FRP

Kansara, Kunal D.    (Dept. of Architecture and Civil Engineering, University of Bath   ); Ibell, Tim J.    (Dept. of Architecture and Civil Engineering, University of Bath   ); Darby, Antony P.    (Dept. of Architecture and Civil Engineering, University of Bath   ); Evernden, Mark    (Dept. of Architecture and Civil Engineering, University of Bath  );
  • 초록

    This paper presents the influence of various flexural strengthening design criteria specified by three important design guidelines (ACI440, TR55, FIB14) on the resulting strength, ductility and conservativeness of FRP strengthened RC elements. Various generalised mathematical relations in non-dimensional form are presented that can be employed to develop design aids for the FRP-strengthening process. A design methodology is prescribed based on these equations enabling the designer to optimally and intuitively incorporate sufficient ductility while designing for strength. In order to better interpret conservativeness within design codes, four distinct levels of embedded conservativeness are identified, which cover the entire range of sources of conservativeness. Finally, a detailed parametric study is presented, using the proposed design equations and methodology, to determine the influence of each of these four levels of conservativeness on final design solutions. Specific criteria that are useful while calibrating design guidelines are also presented.


  • 주제어

    FRP .   strengthening .   concrete structure .   flexural strengthening .   conservativeness.  

  • 참고문헌 (13)

    1. Kansara, K. D. and Ramanjaneyulu, K., “Time-dependent Strength Limit-states for Service Life Estimation of Reinforced Concrete Bridges,” SERC Research Report No. RCS-MLP12641-RR-2007-2, Structural Engineering Research Centre, Chennai, India, 2007. 
    2. Teng, J. G., Chen, J. F., Smith, S. T., and Lam, L., FRPstrengthened RC Structures, John Wiley & Sons, West Sussex, England, 2002. 
    3. ACI440.2R-08, Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures, American Concrete Institute, Michigan, ACI Committee 440, 2008. 
    4. Concrete Society TR55, “Design Guidance for Strengthening Concrete Structures Using Fibre Composite Materials,” Technical Report No. 55 (2/e), The Concrete Society, Surrey, 2004. 
    5. International Federation of Structural Concrete, “Externally Bonded FRP Reinforcement for RC Structures?Technical Report on the Design and Use of Externally Bonded FRP for RC Structures,” FIB Bulletin 14, Lausanne, 2001. 
    6. Japan Society of Civil Engineers, “Recommendations for Upgrading of Concrete Structures with Use of Continuous Fibre Sheets,” JSCE Concrete Engineering Series 41, Tokyo, 2001. 
    7. CSA S806-02, “Design and Construction of Building Components with FRP,” Canadian Standards Association, Toronto, 2002. 
    8. Kansara, K. D., Ibell, T. J., and Darby, A. P., “Evaluation of Flexural Strengthening Design Criteria for FRP Strengthened RC Structures,” Research Report, Department of Architecture and Civil Engineering, University of Bath, Bath, UK, 2009. 
    9. Razaqpur, G. and Ali, A. M., “A New Concept for Achieving Ductility in FRP-Reinforced Concrete,” Proceedings of the First International Conference on Composites in Infra structures (ICCI 96), Tucson, 1996, pp. 401-413. 
    10. ACI318-08, Building Code Requirements for Structural Concrete, American Concrete Institute, Michigan, 2005. 
    11. Aprile, A. and Feo, L., Concrete Cover Rip-off of RC Beams Strengthened with FRP Composites, Composites (Part B: Engineering), Vol. 38, 2006, pp. 759-771. 
    12. BS 8110, Structural Use of Concrete?Part 1: Code of Practice for Design and Construction, British Standards Institution, London, 1997. 
    13. CEN Eurocode 2 (EN 1992-1-1), Design of Concrete Structures?Part 1-1: General Rules and Rules for Buildings, European Committee for Standardisation, Brussels, 1994. 
  • 이 논문을 인용한 문헌 (2)

    1. 2012. "" International journal of concrete structures and materials, 6(1): 41~47     
    2. 2012. "" International journal of concrete structures and materials, 6(1): 49~57     

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