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Kolfiberförstärkning av limträbalkar: Fuktens inverkan på förstärkningen
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science.
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science.
2019 (Swedish)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
Sustainable development
The essay/thesis is partially on sustainable development according to the University's criteria
Abstract [en]

The point with this exam-essay is to study how the strength in glulam beams reinforced with carbon fiber will differentiate with an increased relative humidity (RH). The literature study brings up older work and science in the field that focuses on different reinforcement that can improve the strength in glulam beams.Glulam has higher strength than regular wood, this is due to how glulam is being constructed. When the usage limit condition is being determined the length of the beam will be a factor in deciding highest allowed bending on the beam. Carbon fiber, that has a greater strength than glulam can be used as a reinforcement on the glulam to give it higher strength. When the relative humidity is increased the glulam’s strength will decrease, the goal was to study how great the strength of the reinforced glulam beams would be when the relative humidity in the beams was being increased.In this essay a total of 26 glulam-samples was bent until they reached breaking point, out of these 26 samples half of them will be reinforced with carbon fiber underneath the beam. Half of the samples will be submerged in water, both reinforced and regular beams, where they will stay in two weeks until they are brought up again for bending-tests.The reinforced beams did not show an increase in torque capacity when compared to the non-reinforced beams when analyzing the average force. When analyzing the calculated 95 % -fractile the reinforced beams did show an increase in torque capacity. The dry reinforced glulam-beams showed an increase with 4,8 % and the wet reinforced glulam-beams showed an increase with 13,3 %.

Place, publisher, year, edition, pages
2019. , p. 48
Keywords [en]
Glulam beams, carbon fiber, reinforced, epoxy, bending, strength, relative humidity, deflection.
Keywords [sv]
Limträbalk, kolfiber, epoxi, förstärkning, fukt, styrka, nedböjning, böjprov.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:hig:diva-29656OAI: oai:DiVA.org:hig-29656DiVA, id: diva2:1320148
Subject / course
Building engineering
Educational program
Högskoleingenjör
Supervisors
Examiners
Available from: 2019-06-17 Created: 2019-06-04 Last updated: 2019-06-17Bibliographically approved

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Kolfiberförstärkning av limträbalkar(2923 kB)10 downloads
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CiteExportLink to record
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Citation style
  • apa
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  • Other locale
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Output format
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