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Upgrade of Concrete Bridges by Adaptive Prestressing

 Upgrade of Concrete Bridges by Adaptive Prestressing
Autor(en): , , ,
Beitrag für IABSE Conference: Assessment, Upgrading and Refurbishment of Infrastructures, Rotterdam, The Netherlands, 6-8 May 2013, veröffentlicht in , S. 382-383
DOI: 10.2749/222137813806501795
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The constantly increasing traffic intensity on bridges and their ageing process represent new challenges in the field of bridge engineering. An innovative method to retrofit concrete bridges to mee...
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Autor(en):



Medium: Tagungsbeitrag
Sprache(n): Englisch
Tagung: IABSE Conference: Assessment, Upgrading and Refurbishment of Infrastructures, Rotterdam, The Netherlands, 6-8 May 2013
Veröffentlicht in:
Seite(n): 382-383 Anzahl der Seiten (im PDF): 8
Seite(n): 382-383
Anzahl der Seiten (im PDF): 8
Jahr: 2013
DOI: 10.2749/222137813806501795
Abstrakt:

The constantly increasing traffic intensity on bridges and their ageing process represent new challenges in the field of bridge engineering. An innovative method to retrofit concrete bridges to meet these and further future challenges is the utilisation of an adaptive prestressing of tendons depending on the amount of acting loads. In this paper, the functionality of an adaptive prestressing control system is demonstrated by means of two prototypes, a prestressed aluminium truss and an externally prestressed reinforced concrete T-beam. Through the application of the control system on the prototypes, the deflections could be effectively decreased and critical stress situations in the cross section avoided. The experiments confirmed the potential of the use of adaptive prestressing in concrete bridge constructions.

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