Thin concrete panels prestressed with carbon textile reinforcement: Flexural testing

Research output: Contribution to conferencesPaperContributedpeer-review

Contributors

  • Katarzyna Zdanowicz - , Leibniz University Hannover (LUH) (Author)
  • Steffen Marx - , Leibniz University Hannover (LUH) (Author)

Abstract

For thin concrete members, such as façade panels, carbon textile reinforcement is a suitable solution. Due to its high durability and non-corrosive properties concrete cover can be significantly reduced, and thus thinner and lighter elements can be designed and produced. In our investigation we considered the possibility of prestressing such thin panels with carbon textile reinforcement in order to reduce cracking and allow for larger dimensions. 12 panels with dimensions of 1.30 × 0.15 × 0.03 meters and three prestress levels (3 panels in each series and control series of non-prestressed specimens) were tested in four point bending test. Specimens were reinforced with symmetric textile grids with axial distance between single strands equal to 38 mm in both directions and tensile strength of 2500 MPa. Cracking moment and cracking pattern were observed, as well as ultimate load-bearing capacity and load-deflection relationship. It was observed that due to prestressing cracking moment could be increased by up to 48%. Furthermore, the ductility was improved as deflections corresponding to cracking load increased more than two times. This research programme shown that not only carbon tendons or strips can be prestressed. Prestressing of carbon textile reinforcement is also possible and it can positively influence the ultimate and serviceability limit states.

Details

Original languageEnglish
Pages2473-2481
Number of pages9
Publication statusPublished - 2019
Peer-reviewedYes
Externally publishedYes

Conference

Title5th International fib Congress
SubtitleBetter - Smarter - Stronger
Abbreviated titlefib 2018
Duration7 - 11 October 2018
CityMelbourne
CountryAustralia

External IDs

ORCID /0000-0001-8735-1345/work/142244557

Keywords

Keywords

  • Carbon textile reinforcement, Prestressing, Self-stressing