Experimental and numerical Studies on the shared Activation Anchoring of NSMR CFRP applied to RC Beams

Jacob W. Schmidt*, José Sena-Cruz, Per Goltermann, Christian Overgaard Christensen

*Corresponding author for this work

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Abstract

A shared activation anchoring method used for carbon fiber reinforced polymer (CFRP) near surface mounted reinforcement (NSMR) strengthening is hypothesized to provide a mean to exploit the full material capacity and to tailor desired responses. To investigate strengthening efficiency, failure control as well as ductility levels, the developed strengthening system were mounted on reinforced concrete Tbeams with a length of 6400 mm. Initial activation stresses of 50% (1100 MPa) and 70% (1540 MPa) were applied to an 8 mm CFRP rod by the anchor system. Then, in some beams finite element simulations were carried out for better understanding the obtained results with regard to the overall structural behaviour. Good correlations between the FE-simulation and tested responses were observed, where a high utilization of the CFRP material (up to 3300MPa) was reached. Installation of the activated system worked well, without premature failure. Additionally it was possible to control the failure development, where intermediate crack de-bonding was achieved when testing the beams with an activation level of approximately 50%, while fibre rupture occurred at the level of 70% activation, thus providing a CFRP strain of approximately 0,02.
Original languageEnglish
Publication date2019
Number of pages4
Publication statusPublished - 2019
EventSeventh Asia-Pacific Conference on FRP in Structures - Surfers Paradise, Gold Coast, Australia
Duration: 10 Dec 201913 Dec 2019
Conference number: 7

Conference

ConferenceSeventh Asia-Pacific Conference on FRP in Structures
Number7
CountryAustralia
CitySurfers Paradise, Gold Coast
Period10/12/201913/12/2019

Keywords

  • FRP
  • RC beams
  • Strengthening
  • Interfacial stresses
  • Analytical solution

Cite this

Schmidt, J. W., Sena-Cruz, J., Goltermann, P., & Christensen, C. O. (2019). Experimental and numerical Studies on the shared Activation Anchoring of NSMR CFRP applied to RC Beams. Paper presented at Seventh Asia-Pacific Conference on FRP in Structures , Surfers Paradise, Gold Coast, Australia.