| 1. |
- Enochsson, Ola, et al.
(författare)
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Assessment and condition monitoring of a concrete railway bridge in Kiruna, Sweden
- 2006
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Ingår i: Bridge maintenance, safety, management, life-cycle performance and cost. - London : Taylor and Francis Group. - 0415403154
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Konferensbidrag (refereegranskat)abstract
- A two-span railway concrete trough bridge over Luossajokk in Kiruna in northern Sweden has been studied. The owner wanted to increase the axle loads from 250 to 300 kN in order to reduce freight costs for iron ore. Examples are given of methods used and results obtained from the assessment where bending, shear and fatigue were studied. Material properties, loads and load carrying capacity were evaluated using deterministic and probabilistic methods. It was shown that the bridge could carry the higher loads with a safety index β > 4.7 for reasonable assumptions of the load distributions. A measurement system was installed to check the actual level of critical strains and the worst positions of the train. Results are also given from a condition monitoring program 2001-2006, launched to periodically check the development of strains with time.
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| 2. |
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| 3. |
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| 4. |
- He, Guojing, 1964-, et al.
(författare)
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Assessment of a railway concrete arch bridge by numerical modelling and measurements
- 2008
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Ingår i: <em>Bridge Maintenance, Safety, Management, Health Monitoring and Informatics</em>. - Leiden : CRC Press. ; , s. 3733-3742
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Konferensbidrag (refereegranskat)abstract
- Two main railway concrete arch bridges have been investigated in northern Sweden: the Vindel Bridge over the Vindel River with a span of 110 m and the Långforsen Bridge over the Kalix River with a span of 90 m. The bridges were constructed in the 1950s with similar designs. In order to investigate the possibility to increase the axle load from 225 kN to 250kN, two 3-D Finite Element models with shell elements were developed and two field tests were carried out with passing trains and ambient vibrations. The measurement frequencies and mode shapes were studied with the stochastic subspace identification method in the time domain. Based on a comparison of the predictions of the FE analyses and the results of the field tests, the FE models were updated. It was found that it was possible to make good predictions of the actual dynamic response with reasonable assumptions of material properties and joint stiffness in the structure.
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| 5. |
- Paulsson, Björn, et al.
(författare)
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Increased loads on railway bridges of concrete
- 1997
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Ingår i: Advanced design of concrete structures. - Barcelona : International Center for Numerical Methods in Engineering (CIMNE). - 8487867944 ; , s. 201-206
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Konferensbidrag (refereegranskat)
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