A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Non-destructive defect location and sizing in concrete columns and masonry pillars from impact-echo testing
Experimental work has been carried out via impact-echo on bar-like structural elements with square and circular cross section. These were 2 laboratory specimens in the form of a masonry pillar and a concrete column. The data analysis has shown that the impact-echo technique is able to provide encouraging results in both cases providing qualitative and quantitative information on the defects present in the sections. Examples of significant plots of recorded data in the form of two dimensional images have been presented. In these impactechograms, high amplitude signals corresponding to frequency peaks due to cross-sectional element vibrations may easily be discriminated, as secondary information, from other resonances due to the element dimensions and to the presence of defects. An example of image editing performed on an impactechograms has been produced in order to reconstruct the geometry of investigated section, such as circular cross-sections. These images become directly comparable with the specimen's sections and quantitative information extracted from the data may be related to the real element conditions. The location of defects may be visually spotted on the images and the depth and lateral extension of any inhomogeneity may be evaluated with accuracy. The discussion of the results has provided some interpretation criteria of the impact-echo data and of the peculiarities of impact-echo 2-D data analysis from structural elements with bounded circular and square section.
Non-destructive defect location and sizing in concrete columns and masonry pillars from impact-echo testing
Experimental work has been carried out via impact-echo on bar-like structural elements with square and circular cross section. These were 2 laboratory specimens in the form of a masonry pillar and a concrete column. The data analysis has shown that the impact-echo technique is able to provide encouraging results in both cases providing qualitative and quantitative information on the defects present in the sections. Examples of significant plots of recorded data in the form of two dimensional images have been presented. In these impactechograms, high amplitude signals corresponding to frequency peaks due to cross-sectional element vibrations may easily be discriminated, as secondary information, from other resonances due to the element dimensions and to the presence of defects. An example of image editing performed on an impactechograms has been produced in order to reconstruct the geometry of investigated section, such as circular cross-sections. These images become directly comparable with the specimen's sections and quantitative information extracted from the data may be related to the real element conditions. The location of defects may be visually spotted on the images and the depth and lateral extension of any inhomogeneity may be evaluated with accuracy. The discussion of the results has provided some interpretation criteria of the impact-echo data and of the peculiarities of impact-echo 2-D data analysis from structural elements with bounded circular and square section.
Non-destructive defect location and sizing in concrete columns and masonry pillars from impact-echo testing
Zerstörungsfreie Fehlerortung und -größenbestimmung in Betonpfeilern und gemauerten Pfeilern mit Impakt-Echo-Prüfung
Colla, C. (author) / Pascale, G. (author)
2006
11 Seiten, 13 Bilder, 9 Quellen
Conference paper
Storage medium
English
Non-Destructive Evaluation of Brick Masonry via Scanning Impact-Echo Testing
| British Library Conference Proceedings | 2003
Non-destructive Testing of Concrete and Masonry Buildings
| British Library Online Contents | 2005
Two-dimensional impact-echo for NDT testing of masonry bridges
| British Library Conference Proceedings | 2001