This prestressed concrete box girder bridge consists of 13 spans making up a total length of 1029 meter. It was cast in situ and post-tensioned. The girder depth varies from 10.8 meter at mid-support to 2.85 meter at midspan. There is in total 494 prestress cables in the superstructure that create tension in all three directions. Being a complex engineering structure along the highway A22 with high intensive traffic, there is an interest in assessing the reliability and performance of the Colle Isarco bridge. The superstructure is statically determinate.
Object description
This prestressed concrete box girder bridge consists of 13 spans making up a total length of 1029 meter. It was cast in situ and post-tensioned. The girder depth varies from 10.8 meter at mid-support to 2.85 meter at midspan. There is in total 494 prestress cables in the superstructure that create tension in all three directions. Being a complex engineering structure along the highway A22 with high intensive traffic, there is an interest in assessing the reliability and performance of the Colle Isarco bridge. The superstructure is statically determinate.
Civil engineering type
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Year of construction
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1969
Composed of materials
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Location coordinates
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46° 55' 59.03" N, 11° 26' 52.68" E
Country
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Object analysis
The analysis is a robustness-based performance assessment of a bridge with ongoing deterioration. A probabilistic non-linear FE analysis was carried out, including the effects of corrosion of the tendons. Possible damage scenarios were modelled in 4 discrete stages ranging from 0% tendon failure to 45% tendon failure. Robustness-based performance is a system parameter considering dependance and redistribution among components.
Object state
It is stated in the study that inspection data and data from monitoring during proof loading was included in the model, but the type of data and data collection techniques are not central for this study and therefore not specified. The idea of the method presented is to assess possible damage states independent of the cause of damage.
Observed deterioration processes
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Observed damage types
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Performance indicators
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Images
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Documents
This case study was contributed by Frida Liljefors of Norwegian University Of Science And Technology. Last edited by technical staff.