A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Integrating multiple scattering effects to improve ultrasonic measurement of concrete damage
This study is about ultrasonic non-destructive characterization of concrete damage, it was realized with the collaboration of EDF TEGG France. Concrete is an heterogeneous medium in which degradations often lead to microcracks development. These degradations induce a decrease in mechanical and acoustic properties. The relation between geometric and acoustic parameters is provided, in perfect heterogeneous medium, by several propagation models including multiple scattering theory. We propose an application of the Waterman-Truell's model to concrete and we take into account the microcracks to characterize the damaged concrete. On high performance concrete presenting different states of thermal degradations, we can observe, high sensibility of velocity to the damage and qualitative good agreement between measured and predicted values. We show that non-destructive characterization can be achieved through velocity and attenuation measurements of ultrasonic waves and relations with the microstructure is possible using multiple scattering model. The first numerical and experimental results showed a same order of value. Complementary studies started to reach quantitative comparisons. The final objective is to define in situ measurement solutions by using new techniques to derive from the energy and frequency analysis.
Integrating multiple scattering effects to improve ultrasonic measurement of concrete damage
This study is about ultrasonic non-destructive characterization of concrete damage, it was realized with the collaboration of EDF TEGG France. Concrete is an heterogeneous medium in which degradations often lead to microcracks development. These degradations induce a decrease in mechanical and acoustic properties. The relation between geometric and acoustic parameters is provided, in perfect heterogeneous medium, by several propagation models including multiple scattering theory. We propose an application of the Waterman-Truell's model to concrete and we take into account the microcracks to characterize the damaged concrete. On high performance concrete presenting different states of thermal degradations, we can observe, high sensibility of velocity to the damage and qualitative good agreement between measured and predicted values. We show that non-destructive characterization can be achieved through velocity and attenuation measurements of ultrasonic waves and relations with the microstructure is possible using multiple scattering model. The first numerical and experimental results showed a same order of value. Complementary studies started to reach quantitative comparisons. The final objective is to define in situ measurement solutions by using new techniques to derive from the energy and frequency analysis.
Integrating multiple scattering effects to improve ultrasonic measurement of concrete damage
Integration von Mehrfachstreueffekten zur Verbesserung von Ultraschallmessungen an Betonschädigungen
Chaix, J.F. (author) / Garnier, V. (author) / Corneloup, G. (author)
2002
8 Seiten, 8 Bilder, 2 Tabellen, 11 Quellen
(Nicht paginiert).
Conference paper
Storage medium
English
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