Numerical optimization of strengthening disturbed regions of dapped-end beams using NSM and EBR CFRP
2014 (English)In: Composites Part B: Engineering, ISSN 1359-8368, E-ISSN 1879-1069, Vol. 67, 381-390 p.Article in journal (Refereed) Published
This paper presents a parametric investigation, based on non-linear finite element modeling, to identify the most effective configuration of carbon fiber reinforced polymers (CFRP) for strengthening reinforced concrete (RC) dapped end beams. Following a field application and laboratory tests, it focuses on effects of 24 externally bonded (EBR) and near surface mounted reinforcement (NSMR) configurations on yield strain in steel and the capacity and failure mode of dapped-end beams. The investigated parameters were the mechanical properties of the CFRP, the strengthening procedure and the inclination of the fibers with respect to the longitudinal axis. Two failure scenarios were considered: rupture and debonding of the FRP. The results indicate that high-strength NSM FRPs can considerably increase the capacity of dapped-end beams and the yielding strains in reinforcement can be substantially reduced by using high modulus fibers.
Place, publisher, year, edition, pages
2014. Vol. 67, 381-390 p.
Civil engineering and architecture - Building engineering
Samhällsbyggnadsteknik och arkitektur - Byggnadsteknik
Research subject Structural Engineering
IdentifiersURN: urn:nbn:se:ltu:diva-15465DOI: 10.1016/j.compositesb.2014.07.013Local ID: efa177d0-e3fa-400c-b55a-c77786b9e92fOAI: oai:DiVA.org:ltu-15465DiVA: diva2:988439
Validerad; 2014; 20140709 (cospop)2016-09-292016-09-29Bibliographically approved