Adaption of the FIB bulletin 14 design guideline for externally bonded bending reinforcement made of a textile reinforced cement composite

Research output: Chapter in Book/Report/Conference proceedingMeeting abstract (Book)

Abstract

Until now the most commonly used materials for externally reinforcing concrete structures are Carbon Fibre Reinforced Polymers (CFRP). Design guidelines exist for these CFRP-reinforcing materials and are described in the FIB bulletin 14. However, other cement matrix strengthening materials, such as Textile Reinforced Cement (TRC) composites are emerging, due to the increasing fibre volume fraction that can be achieved in production and the resulting relatively high mechanical capacities. Currently, no design guidelines exist for the strengthening of concrete structures with these cementitious composite materials. This paper contributes to the adaption of the FIB bulletin 14 for TRC by proposing new design parameters for the modelling of debonding failure. To achieve this, 24 single lap shear tests, with different bond lengths and TRC thicknesses are performed and thoroughly analysed. Finally, the adapted design rules are evaluated by tests on 0.6 meter span TRC reinforced beams. Due to a difference between the observed (failure in composite action) and predicted (failure by loss of composite action) failure mode, the FIB bulletin 14 underestimates the ultimate bending load. These observations indicate the need for a new design method for TRC external reinforcement that goes beyond the adaption of the parameters in the existing CFRP design.
Original languageEnglish
Title of host publicationICCS18 8th International Conference on composite structures Book of Abstracts
EditorsAntonio Ferreira
PublisherUniversity of Porto
Pages15-16
Number of pages2
Publication statusPublished - 2015
EventICCS18 18th International Conference on composite structures - Lisbon, Portugal
Duration: 15 Jun 201518 Jun 2015

Conference

ConferenceICCS18 18th International Conference on composite structures
Country/TerritoryPortugal
CityLisbon
Period15/06/1518/06/15

Keywords

  • FIB bulletin 14
  • bonded reinforcement
  • Textile reinforced cement (TRC)
  • Composites

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