Upgrade of Concrete Bridges by Adaptive Prestressing
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Bibliographic Details
| Author(s): |
Martina Schnellenbach-Held
Abdalla Fakhouri Daniel Steiner Oliver Kühn |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Conference: Assessment, Upgrading and Refurbishment of Infrastructures, Rotterdam, The Netherlands, 6-8 May 2013 | ||||
| Published in: | IABSE Conference, Rotterdam, May 2013 | ||||
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| Page(s): | 382-383 | ||||
| Total no. of pages: | 8 | ||||
| Year: | 2013 | ||||
| DOI: | 10.2749/222137813806501795 | ||||
| Abstract: |
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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| Keywords: |
adaptive prestressing fuzzy logic hydraulic actuators closed-loop control system
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