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Danielsson, Georg
Publications (8 of 8) Show all publications
Bennitz, A., Täljsten, B. & Danielsson, G. (2012). CFRP strengthening of a railway concrete trough bridge: a case study (ed.). Paper presented at . Structure and Infrastructure Engineering, 8(9), 801-816
Open this publication in new window or tab >>CFRP strengthening of a railway concrete trough bridge: a case study
2012 (English)In: Structure and Infrastructure Engineering, ISSN 1573-2479, E-ISSN 1744-8980, Vol. 8, no 9, p. 801-816Article in journal (Refereed) Published
Abstract [en]

This paper presents an upgrading and monitoring of a Swedish concrete railway bridge. The methods used for the upgrading as well as for the monitoring are innovative and new. Carbon fibre tubes are inserted in holes in the bridge deck, drilled in the transverse direction of the slab at a location ca. 40 mm from the top. Carbon fibre NSMR bars are bonded in transverse grooves in the soffit of the slab. Both methods are intended to increase the transverse bending moment capacity of the troughs' bottom slab in the ultimate limit state. Monitoring is performed to verify the effectiveness of the strengthening and to understand the behaviour of the bridge. However, for obvious reasons, monitoring is only carried out in the SLS (service limit state). Even though only marginal effects of strengthening could be recorded in the SLS, both the strengthening and monitoring were considered successful at a cost of approximately 8% of the total cost of a new bridge replacement.

National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-3183 (URN)10.1080/15732479.2010.489787 (DOI)000303612400001 ()2-s2.0-84861359940 (Scopus ID)0f93fcb2-85b6-473d-a567-59bdce0607aa (Local ID)0f93fcb2-85b6-473d-a567-59bdce0607aa (Archive number)0f93fcb2-85b6-473d-a567-59bdce0607aa (OAI)
Note
Validerad; 2012; 20110211 (benand)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Bergström, M., Täljsten, B. & Danielsson, G. (2009). Bro över Pankens utlopp: mätning före och efter förstärkning (ed.). Paper presented at . Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>Bro över Pankens utlopp: mätning före och efter förstärkning
2009 (Swedish)Report (Other academic)
Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2009. p. 76
Series
Technical report / Luleå University of Technology, ISSN 1402-1536
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-23611 (URN)7b0e9550-ac09-11de-8293-000ea68e967b (Local ID)978-91-7439-005-6 (ISBN)7b0e9550-ac09-11de-8293-000ea68e967b (Archive number)7b0e9550-ac09-11de-8293-000ea68e967b (OAI)
Note
Godkänd; 2009; 20090928 (marber)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-03-20Bibliographically approved
Bennitz, A., Täljsten, B. & Danielsson, G. (2008). Strengthening of a railway bridge with NSMR and CFRP tubes (ed.). In: (Ed.), Masoud Motavalli (Ed.), FRP Composites in Civil Engineering: proceedings of the 4th International Conference on FRP Composites in Civil Engineering ; Zurich, Switzerland, 22 - 24 July 2008. Paper presented at International Conference on FRP Composites in Civil Engineering : 22/07/2008 - 24/07/2008. Dübendorf: EMPA-Akademie
Open this publication in new window or tab >>Strengthening of a railway bridge with NSMR and CFRP tubes
2008 (English)In: FRP Composites in Civil Engineering: proceedings of the 4th International Conference on FRP Composites in Civil Engineering ; Zurich, Switzerland, 22 - 24 July 2008 / [ed] Masoud Motavalli, Dübendorf: EMPA-Akademie , 2008Conference paper, Published paper (Refereed)
Abstract [en]

Strengthening of structures with CFRP is considered today as an accepted method in the upgrading of concrete structures. This paper presents the use of two different CFRP strengthening systems combined to extend the service life of a Swedish double-trough-doubletrack railway bridge, constructed in concrete with a 10 meter span. One system is the reliable NSMR (Near Surface Mounted Reinforcement) while the other is new. They were used with the intention to strengthen the interior of a concrete structure using integrated CFRP tubes. Both systems were used to increase the tensile flexural strength of the slab transverse to the tracks. NSMR bars were positioned in the bottom concrete cover of the trough's bottom-slabs, while the new system was inserted in holes drilled through the bridge in the cross direction and located in the upper part of the slab. In connection with the strengthening monitoring was conducted in order to obtain an understanding of the bridge behaviour before and after strengthening, and to demonstrate any effects of the extra CFRP reinforcement. Results from these measurements are presented together with how the strengthening work was carried out. Sensors on bars and tubes show evidence of utilization of the CFRP while displacement sensors and strain gauges on the steel reinforcement show minor effect due to the small loads in the service limit state.

Place, publisher, year, edition, pages
Dübendorf: EMPA-Akademie, 2008
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-39485 (URN)e4341a40-c105-11dd-a054-000ea68e967b (Local ID)978-3-905594-50-8 (ISBN)e4341a40-c105-11dd-a054-000ea68e967b (Archive number)e4341a40-c105-11dd-a054-000ea68e967b (OAI)
Conference
International Conference on FRP Composites in Civil Engineering : 22/07/2008 - 24/07/2008
Note
Godkänd; 2008; 20081203 (benand)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2018-03-20Bibliographically approved
Bergström, M., Danielsson, G. & Täljsten, B. (2005). Bro över Järpströmmen: kompletterande mätning av påkänningar vid tung överfart (ed.). Paper presented at . Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>Bro över Järpströmmen: kompletterande mätning av påkänningar vid tung överfart
2005 (Swedish)Report (Other academic)
Abstract [sv]

Kompletterande mätning på bron över Järpströmmen genomfördes då lasten vid föregående mätning ansågs för liten. Vid aktuell mätning bestod lasten av ett transportekipage med en totalvikt på cirka 400 ton fördelat på 20 hjulaxlar och en bit över 100 däck. Mycket låg påkänning i kolfibermaterial och stålarmering, i storleksordningen omkring 5 m/m. Den låga påkänningen härleds inte till en för låg last, då ekipagets tyngd är stor. Däremot kan mätresultaten förklaras i att tvärkraftsarmeringen och förstärkningen inte tar last förrän uppsprickning av brobetongen inträffar. Betongbrons spricklast förutsätts inte vara uppnådd vid aktuell lastnivå, vilket förklarar de små töjningarna på armering och kolfiber. Detta resonemang baseras på genomförda försök (Carolin, 2003). Erfarenhetsmässigt är tvärkraftsförstärkning med kolfiberlaminat en fungerande och effektiv metod för att uppgradera en konstruktion. Kolfiberförstärkningen har konsekvent en töjning omkring 5 με vid överfart, vilket visar att förstärkningen tar last och därmed fungerar. Ingen tendens av vidhäftningsproblem finns vid aktuell lastnivå, vilket stöds av att armeringen och kolfibermaterialet töjs lika mycket. Detta betyder att förstärkningen fortsätter ta mer last vid ökad belastning. Förstärkningen kan därför förutsättas bidra till en ökad kapacitet i brottgränstillstånd, då uppsprickning av betong inträffar, trots att effekterna är svåra att bestyrka i bruksgränstillstånd och utförd mätning.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2005. p. 36
Series
Technical report / Luleå University of Technology, ISSN 1402-1536 ; 2005:04
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-21816 (URN)04cf1d20-2806-11dd-8187-000ea68e967b (Local ID)04cf1d20-2806-11dd-8187-000ea68e967b (Archive number)04cf1d20-2806-11dd-8187-000ea68e967b (OAI)
Note
Godkänd; 2005; 20080522 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-03-20Bibliographically approved
Danielsson, G., Johansson, H., Thun, H. & Elfgren, L. (2002). Töjningsmätning på järnvägsbro över Luossajokk i Kiruna (ed.). Paper presented at . Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>Töjningsmätning på järnvägsbro över Luossajokk i Kiruna
2002 (Swedish)Report (Other academic)
Alternative title[en]
Strain measurements on the railway bridge over Luossajokk in Kiruna
Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2002. p. 68
Series
Technical report / Luleå University of Technology, ISSN 1402-1536 ; 2002:05
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-22792 (URN)44c3ea60-71ae-11db-962b-000ea68e967b (Local ID)44c3ea60-71ae-11db-962b-000ea68e967b (Archive number)44c3ea60-71ae-11db-962b-000ea68e967b (OAI)
Note
Godkänd; 2002; 20061111 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Elfgren, L., Danielsson, G., Holm, I. & Söderlind, G. (2001). Long time load-carrying capacity of bonded anchors (ed.). In: (Ed.), R. Eligehausen (Ed.), Connections between steel and concete: . Paper presented at International RILEM Symposium on Connections Between Steel and Concrete : 10/09/2001 - 12/09/2001 (pp. 391-401). Cachan (Val-de-Marne): Rilem publications
Open this publication in new window or tab >>Long time load-carrying capacity of bonded anchors
2001 (English)In: Connections between steel and concete / [ed] R. Eligehausen, Cachan (Val-de-Marne): Rilem publications, 2001, p. 391-401Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Cachan (Val-de-Marne): Rilem publications, 2001
Series
Proceedings / RILEM ; 21
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-35352 (URN)9dc87ef0-7195-11db-962b-000ea68e967b (Local ID)2-912143-25-X (ISBN)9dc87ef0-7195-11db-962b-000ea68e967b (Archive number)9dc87ef0-7195-11db-962b-000ea68e967b (OAI)
Conference
International RILEM Symposium on Connections Between Steel and Concrete : 10/09/2001 - 12/09/2001
Note
Godkänd; 2001; 20061111 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Paulsson, B., Töyrä, B., Elfgren, L., Ohlsson, U. & Danielsson, G. (1997). Increased loads on railway bridges of concrete (ed.). In: (Ed.), Kent Gylltoft (Ed.), Advanced design of concrete structures: [papers presented at the Symposium on Advanced Design of Concrete Structures, held in Chalmers University of Technology in Göteborg, Sweden on June 12 - 14, 1997]. Paper presented at Symposium on Advanced Design of Concrete Structures : 12/06/1997 - 14/06/1997 (pp. 201-206). Barcelona: International Center for Numerical Methods in Engineering (CIMNE)
Open this publication in new window or tab >>Increased loads on railway bridges of concrete
Show others...
1997 (English)In: Advanced design of concrete structures: [papers presented at the Symposium on Advanced Design of Concrete Structures, held in Chalmers University of Technology in Göteborg, Sweden on June 12 - 14, 1997] / [ed] Kent Gylltoft, Barcelona: International Center for Numerical Methods in Engineering (CIMNE), 1997, p. 201-206Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Barcelona: International Center for Numerical Methods in Engineering (CIMNE), 1997
Series
Theory and engineering applications of computational methods
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-38101 (URN)c6201b40-7273-11db-962b-000ea68e967b (Local ID)84-87867-94-4 (ISBN)c6201b40-7273-11db-962b-000ea68e967b (Archive number)c6201b40-7273-11db-962b-000ea68e967b (OAI)
Conference
Symposium on Advanced Design of Concrete Structures : 12/06/1997 - 14/06/1997
Note
Godkänd; 1997; 20061112 (ysko)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2018-03-27Bibliographically approved
Elfgren, L., Ohlsson, U., Danielsson, G., Åström, L., Johansson, H., Paulsson, B. & Töyrä, B. (1996). 30 ton på Malmbanan. Rapport 3.3 Infrastruktur.: Forsknings- och utvecklingsprojekt avseende betongbroars bärighet (ed.). Paper presented at . Borlänge: Banverket
Open this publication in new window or tab >>30 ton på Malmbanan. Rapport 3.3 Infrastruktur.: Forsknings- och utvecklingsprojekt avseende betongbroars bärighet
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1996 (Swedish)Report (Refereed)
Abstract [sv]

I rapporten redovisas fältmätningar på fyra broar och provbelastning I laboratoriet av en bro

Place, publisher, year, edition, pages
Borlänge: Banverket, 1996. p. 129
Keywords
Civil engineering and architecture - Building engineering, utmattning, betong, stål, Samhällsbyggnadsteknik och arkitektur - Byggnadsteknik
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-23004 (URN)53a2aad7-cf10-4d43-9a70-413d5e32c6e4 (Local ID)53a2aad7-cf10-4d43-9a70-413d5e32c6e4 (Archive number)53a2aad7-cf10-4d43-9a70-413d5e32c6e4 (OAI)
Note
Godkänd; 1996; 20130805 (elfgren)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-03-27Bibliographically approved
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