Extending the Life of Concrete Infrastructure with Fibre Reinforced Polymer (FRP)

Extending the Life of Concrete Infrastructure with Fibre Reinforced Polymer (FRP)

ERPE research into FRP strengthening of existing engineering structures continues to impact design guidelines for updating the ageing infrastructure. 75% of developed world investment covers retrofitting and repair, with FRP strengthening now the preferred solution. ERPE research has been incorporated into 12 worldwide design guides codes and standards.

The research contributions include:

  • Adhesive Joint Analysis, enhancing the FRP joint to concrete, masonry and metallic structures [1, 2]
  • Strengthening Concrete Structures using FRP Composites, includes models for flexure, shear, and confinement [3]
  • FRP strengthening for extreme events, has established the performance of FRP in fire including fire-damaged structures [3]
  • Strengthening metallic structures using FRP composites, transfer to metallics is included in CIRIA design guidance report C595 , which incorporates the ERPE adhesive stress distribution [1]

Examples of how the ERPE research is incorporated into worldwide industrial practice:

  • Australian Standard HB 305 (2008) incudes:
    • the ERPE concept on how side plates resist shear forces in RC beams, adopted in Chapter 3
    • two ERPE shear strength models [2], are adopted in Chapter 4
  • American Concrete Institute (2008) Report ACI 440.2R-08 incorporates
    • the proposed ERPE "development length" model is included in Clause 13.1.3
    • A revised form of ERPE's IC debonding model is included in Clause 10.1.1
  • UK Concrete Society (2012) Technical Report 55 includes
    • Improved, rational model for confinement of square and rectangular columns, Chapter 8
    • Our innovation on fibre-reinforced cementitious mortar systems is recommended, Chapter 9

"Bisby is the undisputed global research leader in the area of fire resistance of FRP strengthened and/or reinforced concrete structures. ERPE staff are responsible for forming the basis of all current structural fire safety design guidance including the USA (ACI 440) and Canada (CSA S806)." Chair CSA Committees S806-807-808.

"The ERPE research on structural applications of FRP composites has been adopted in standards and guides worldwide. They are at the forefront of fire performance of FRP materials with highly influential contributions in adhesive joint analysis, strengthening for square columns and web strengthening for steel girders." Director of Engineering, Parsons Brinkerhoff.

[1] Stratford T.J. and Cadei J.M.C., "Elastic analysis of adhesion stresses for the design of a strengthening plate bonded to a beam”, Construction and Building Materials, 20, pp. 34-45, 2006. DOI:10.1016/j.conbuildmat.2005.06.041.

[2] Teng, J.G., Chen, J.F., Smith, S.T. and Lam, L., "Behaviour and strength of FRP-strengthened RC structures: a state-of-the-art review", Proceedings of the Institution of Civil Engineers - Structures and Buildings, Vol.156, No. SB1, pp. 51-62, 2003. DOI:10.1680/stbu.2003.156.1.51.

[3] Bisby L.A., Chen J.F., Stratford T.J., Cueva N. and Crossling K., "Strengthening fire-damaged concrete by confinement with fibre-reinforced polymer wraps", Engineering Structures, Vol. 33, No. 12, pp. 3381-3391, 2011. DOI:10.1016/j.engstruct.2011.07.002.

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Monday, 16 December, 2013 - 14:31