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Numerical optimization of strengthening disturbed regions of dapped-end beams using NSM and EBR CFRP
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering. NORUT, Department of Infrastructure Structures and Materials.ORCID iD: 0000-0002-8682-876X
Politechnica University of Timisoara.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.ORCID iD: 0000-0001-9423-7436
Politechnica University of Timisoara.
2014 (English)In: Composites Part B: Engineering, ISSN 1359-8368, E-ISSN 1879-1069, Vol. 67, 381-390 p.Article in journal (Refereed) Published
Abstract [en]

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.
Keyword [en]
Civil engineering and architecture - Building engineering
Keyword [sv]
Samhällsbyggnadsteknik och arkitektur - Byggnadsteknik
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
URN: 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
Note
Validerad; 2014; 20140709 (cospop)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Sas, GabrielPopescu, Cosmin

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