Überwachung, Prüfung, Bewertung und Beurteilung von Brücken

Eichinger-Vill, Eva-Maria; Kollegger, Johann; Aigner, Francesco; Ramberger, Günter

doi:10.1007/978-3-642-04423-6_11

Cited by 3 publications

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Enhancing SHM with the extension of the deformation area difference method into the strain area difference method

Čamo,

Apostolidi,

Waldmann

2024

Structural Concrete

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This study contributes to the fields of nondestructive testing (NDT) and structural health monitoring (SHM), which are pivotal for extending the service life of infrastructure and aligning with sustainability goals in construction. The study emphasizes an advanced application of the deformation area difference (DAD) Method, focusing on the comparative analysis of curvature lines derived from photogrammetry‐assisted deflection measurements and direct strain measurements. The novel strain area difference (SAD) method is presented. The research includes numerical simulations and practical experiments. A laboratory experiment with a steel beam demonstrates the method's effectiveness by comparing curvature lines from strain and deflection data. Additionally, an on‐site application on a composite bridge using photogrammetry and drone technology is described with a comparative numerical analysis. The investigations' results shed light on the potential of integrating diverse data sources in NDT/SHM practices. For instance, the integration of deflection measurements and strain measurements for SHM. The comparative analysis provides crucial insights into the accuracy and applicability of the DAD and SAD method in various structural scenarios, improving the precision of condition assessments in reinforced concrete structures. The findings have significant implications for the sustainable maintenance and operation of infrastructure. They support efficient decision‐making in the maintenance and repair of structures, contributing to their longevity and reducing the need for extensive interventions. They present a robust framework for decision‐making in predictive maintenance.

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Enhancing SHM with the extension of the deformation area difference method into the strain area difference method

Čamo,

Apostolidi,

Waldmann

2024

Structural Concrete

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Long-term Corrosion Monitoring for Evaluating the Performance of Repair Measures

Binder,

Burtscher

2024

Procedia Structural Integrity

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Improvements in chloride determination in reinforced concrete structures to find optimal time for remediation

Binder¹,

Burtscher

2022

IABSE Reports

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For a highway operator, such as ASFiNAG, bridges are very important assets. Despite all regular maintenance measures, these structures are strongly subjected to ageing and degradation, because of their exposure. Thus, leading to high maintenance expenditures. In Austria strong winters are obligatory and, therefore, de-icing measures are used for thawing. These substances contain chlorides, which are dissolved in water. Several elements of the bridges – especially the columns – are severely exposed. The exposure over many years leads to serious concrete degradation, depassivation of the rebars and pitting corrosion.The LA-ICP-MS (Laser Ablation Inductively Coupled Plasma Mass Spectrometry) method presented in this paper is a fast and reliable analysis strategy for determination of the chloride content in the cement phase of existing concrete structures. The high accuracy and depth resolution of the chloride profiles enable a more precise data assessment for forecast models.For this purpose, chloride profiles were taken from a retaining wall at different heights. The analysis shows significant deviations comparing traditional and new method concerning chloride contend. The challenges associated with such deviations in relation with the optimal time for remediation are shown in an example investigation.

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Überwachung, Prüfung, Bewertung und Beurteilung von Brücken

Cited by 3 publications

References 0 publications

Enhancing SHM with the extension of the deformation area difference method into the strain area difference method

Enhancing SHM with the extension of the deformation area difference method into the strain area difference method

Long-term Corrosion Monitoring for Evaluating the Performance of Repair Measures

Improvements in chloride determination in reinforced concrete structures to find optimal time for remediation

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