A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Investigations on Existing Concrete Cantilever Walls Subjected to Reinforcement Corrosion
Abstract Recently fatal collapses of reinforced cantilever walls occurred in the Alpine Region. Investigations on the collapsed walls showed that these constructions suffered from corrosion damage along the horizontal construction joint between the foundation and the vertical concrete wall, which is also the most sensitive region with respect to stresses. The detection of corrosion is a difficult task, since the critical areas are not easy to access, because they are situated on the backfill side of the structure and detection of corroded reinforcement elements is still a very challenging task. This paper deals with a numerical sensitivity study based on finite element analysis (FEA) of existing cantilever walls with the objective to identify reliable detection methods. Different simulations of corrosion scenarios and corrosion states at the critical construction joint were taken into account. Furthermore the possibilities of damage detection using non-direct methods (deformation measurement, inclination and concrete strains for mobile or fix stationary installed sensors) are evaluated. It is demonstrated that the possibility of non-direct damage detection is limited to certain conditions. These structures are very rigid, and have many influencing factors which makes it difficult to identify certain damages. Further investigations on damage detection of concrete retaining structures are needed.
Investigations on Existing Concrete Cantilever Walls Subjected to Reinforcement Corrosion
Abstract Recently fatal collapses of reinforced cantilever walls occurred in the Alpine Region. Investigations on the collapsed walls showed that these constructions suffered from corrosion damage along the horizontal construction joint between the foundation and the vertical concrete wall, which is also the most sensitive region with respect to stresses. The detection of corrosion is a difficult task, since the critical areas are not easy to access, because they are situated on the backfill side of the structure and detection of corroded reinforcement elements is still a very challenging task. This paper deals with a numerical sensitivity study based on finite element analysis (FEA) of existing cantilever walls with the objective to identify reliable detection methods. Different simulations of corrosion scenarios and corrosion states at the critical construction joint were taken into account. Furthermore the possibilities of damage detection using non-direct methods (deformation measurement, inclination and concrete strains for mobile or fix stationary installed sensors) are evaluated. It is demonstrated that the possibility of non-direct damage detection is limited to certain conditions. These structures are very rigid, and have many influencing factors which makes it difficult to identify certain damages. Further investigations on damage detection of concrete retaining structures are needed.
Investigations on Existing Concrete Cantilever Walls Subjected to Reinforcement Corrosion
Kwapisz, Maciej (author) / Vorwagner, Alois (author) / Rebhan, Matthias (author) / Tschuchnigg, Franz (author)
2017-08-06
9 pages
Article/Chapter (Book)
Electronic Resource
English
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