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Fatigue Capacity of Small Railway Concrete Bridges: Prevision of the Results of Swedish Full-scale Tests. Comparison and Analyses
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och -produktion.ORCID-id: 0000-0002-0560-9355
2000 (engelsk)Rapport (Annet vitenskapelig)
Abstract [en]

In this report results and analyses are presented from a full-scale fatigue test on a typical Swedish railway concrete bridge. The tests were performed at Luleå University of Technology in 1996. The purpose of the test was to study static and fatigue behaviour of the bridge under increased load in order to check its remaining life length. The bridge was originally situated in Lautajokk about 200 km northwest of Luleå along the iron ore line between Luleå and Narvik in Norway. The bridge had a length of 6,1 m and a width of 4,1 m and had the shape of a trough. It was built in 1967 and had been in service for 20 years. In the tests, the bridge was exposed to 6 million load cycles between 50 and 360 kN. No failure occurred even though the Swedish Concrete code BBK 94 indicated that. Especially the connection between the slab and the longitudinal beams was in a critical state according to the code.A study regarding the fatigue shear capacity with the Swedish code and the present Eurocode EC2 (1991) has shown that the codes are conservative and that further studies are needed in this area.Methods are proposed that can be used to estimate the remaining life length (Strain/deflection criterion and Wöhler curves). An analysis using a fracture mechanics approach is presented as well as studies regarding concrete strength development for Swedish Railway concrete bridges.Measurements of deflections and strains have also been carried out on four railway bridges during passing of trains

sted, utgiver, år, opplag, sider
Luleå: Luleå University of Technology. Department of Civil and Environmental Engineering. Division of Structural Engineering , 2000. , s. 99
Serie
Report, Division of Structural Engineering, Luleå University of Technology
Emneord [en]
Civil engineering and architecture - Building engineering
Emneord [sv]
Fatigue, Concrete, Bridges, Samhällsbyggnadsteknik och arkitektur - Byggnadsteknik
HSV kategori
Forskningsprogram
Konstruktionsteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-25411Lokal ID: f12a62f0-3793-11dd-8721-000ea68e967bOAI: oai:DiVA.org:ltu-25411DiVA, id: diva2:998463
Merknad

Godkänd; 2000; Bibliografisk uppgift: Final Report for an Investigation on Fatigue of Railway Concrete Bridges to ERRI D216, European Rail Research Institute; 20080611 (ysko)

Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-03-27bibliografisk kontrollert

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Thun, HåkanOhlsson, UlfElfgren, Lennart

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