Performance assessment on degrading concrete structures including considerations on the time variant alteration
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Bibliographic Details
Author(s): |
Fritz Binder
(ASFINAG Bau Management GmbH, Vienna, Austria; University of Natural Resources and Life Sciences Institute of Structural Engineering, Vienna, Austria)
Stefan L. Burtscher (burtscher consulting GmbH, Rocket NG GmbH, Vienna, Austria) Alfred Strauss (University of Natural Resources and Life Sciences Institute of Structural Engineering, Vienna, Austria) |
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Medium: | conference paper | ||||
Language(s): | English | ||||
Conference: | IABSE Congress: Structural Engineering for Future Societal Needs, Ghent, Belgium, 22-24 September 2021 | ||||
Published in: | IABSE Congress Ghent 2021 | ||||
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Page(s): | 341-348 | ||||
Total no. of pages: | 8 | ||||
DOI: | 10.2749/ghent.2021.0341 | ||||
Abstract: |
The infrastructure of ASFiNAG is mainly built from reinforced and prestressed concrete, which despite all regular maintenance measures, is subject to ageing and degradation. The major degradation process is chloride attack, followed by carbonation, which both lead to corrosion of the reinforcing steel. In this paper chlorides in the concrete are analysed with a new method, which represents a major improvement over previous assessment. The paper also introduces a new concept for the durability assessment by using objective indicators, like chloride content, electrical resistivity, and corrosion potential. For objectivity and a reliable determination of the condition state, an overall performance index derived from the condition indices using an analytic hierarchy process (AHP) is adopted. The model is applied to excellent and dense data from a monitoring system and investigations taken from reinforced concrete components beside the motorway. |
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Keywords: |
corrosion existing structures performance assessment LA-ICP-MS chloride content performance index Laser Ablation Inductively Coupled Plasma Mass Spectrometry condition index analytic hierarchy process short time prediction
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Copyright: | © 2021 International Association for Bridge and Structural Engineering (IABSE) | ||||
License: | This creative work is copyrighted material and may not be used without explicit approval by the author and/or copyright owner. |