Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Optical methods for 3D-reconstruction of railway bridges: Infrared scanning, Close range photogrammetry and Terrestrial laser scanning
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och brand.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och brand.
2018 (engelsk)Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
Abstract [en]

The forecast of the next upcoming years estimates a growth of demand in transport. As the railway sector in Europe has developed over many years, the infrastructure presents performance issues because of, among other factors, asset maintenance activities being difficult and time consuming. There are currently 4000 railway bridges in Sweden managed by Trafikverket which are submitted to inspections at least every six years. The most common survey is done visually to determine the physical and functional condition of the bridges as well as finding damages that may exist on them. Because visual inspection is a subjective evaluation technique, the results of these bridge inspections may vary from inspector to inspector. The data collection is time consuming and written in standard inspection reports which may not provide sufficient visualization of damages. The inspector also needs to move around the bridge at close distance which could lead to unsafe working conditions.

3D modelling technology is becoming more and more common. Methods such as Close Ranged Photogrammetry (CRP) and Terrestrial Laser Scanning (TLS) are starting to be used for architecture and heritage preservation as well as engineering applications. Infrared (IR) scanning is also showing potential in creating 3D models but has yet not been used for structural analysis and inspections. A result from these methods is a point cloud, a 3D representation of a model in points that can be used for creating as-built Building Information Modeling (BIM)-models.

In this study, the authors put these three methods to test to see if IR scanning and CRP are suitable ways, such as TLS is, to gather data for 3D-reconstruction of concrete railway bridges in fast, safe and non-disturbing ways. For this, the three technologies are performed on six bridges chosen by Trafikverket. The further aim is to determine if the 3D-reconstructions can be used for acquiring BIM-information to, among other things, create as-built drawings and to perform structural evaluations.

As a result from the study, IR scanning and CRP show great potential as well as TLS in 3D-reconstruction of concrete railway bridges in fast, safe and non-disturbing ways. Still, there is a need of development regarding the technologies before we can start to rely on them completely.

sted, utgiver, år, opplag, sider
2018. , s. 110
Emneord [en]
bridge inspection, non-destructive, safety, efficient, 3D-scanning, traffic disturbance, BIM, assessment, as-built, point cloud
HSV kategori
Identifikatorer
URN: urn:nbn:se:ltu:diva-67716OAI: oai:DiVA.org:ltu-67716DiVA, id: diva2:1184613
Fag / kurs
Student thesis, at least 30 credits
Utdanningsprogram
Architectural Engineering, master's level
Presentation
2018-01-19, F1031, Luleå, 13:00 (engelsk)
Veileder
Examiner
Tilgjengelig fra: 2018-03-07 Laget: 2018-02-21 Sist oppdatert: 2018-03-07bibliografisk kontrollert

Open Access i DiVA

fulltext(23990 kB)281 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 23990 kBChecksum SHA-512
6cc55ddd71ab108dcf2753cd0ab9f904085588fcbbf336557c0dcecb5b73bba03542966ed7579ed22c96a38e6c3465d11b80ffe6d2cf8691766d9f7f45611dc7
Type fulltextMimetype application/pdf

Søk i DiVA

Av forfatter/redaktør
Crabtree Gärdin, DavidJimenez, Alexander
Av organisasjonen

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 281 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

urn-nbn

Altmetric

urn-nbn
Totalt: 891 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf