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Dinámica fuera de equilibrio en concreto: Efectos del acondicionamiento inducido por bombeo en parámetros de
Shilan Shaabani1, Pierric Mora1, Parisa Shokouhi2
1GERS-GeoEND, Univ Gustave Eiffel, Bouguenais, CS5004, F-44344, France.
The Journal of the Acoustical Society of America
|January 26, 2026
Resumen
La interferometría de ondas de ruido no lineal (NCWI) puede detectar grietas, pero su efectividad depende de los protocolos de bombeo. Las duraciones de bombeo más largas y las secuencias de amplitud consistentes son cruciales para un monitoreo preciso de materiales in situ utilizando esta técnica.
Área de la Ciencia:
- Ciencia de Materiales
- Pruebas No Destructivas
- Ultrasonido
Sus antecedentes:
- Las pruebas ultrasónicas lineales tienen dificultades para detectar grietas finas y microgrietas.
- Las técnicas ultrasónicas no lineales, como la interferometría de ondas de ruido no lineal (NCWI), ofrecen una mayor sensibilidad.
- La NCWI utiliza ondas de ruido de alta frecuencia y bombeo de alta amplitud de baja frecuencia para detectar cambios de velocidad relacionados con grietas.
Objetivo del estudio:
- Investigar la influencia de los protocolos de bombeo en los resultados de NCWI para el monitoreo de materiales in situ.
- Explorar el potencial de la carga dinámica en servicio como fuente de bombeo para NCWI.
- Comprender los mecanismos subyacentes de la respuesta dependiente del tiempo del material al bombeo.
Principales métodos:
- Investigación sistemática de la duración del bombeo y las secuencias de amplitud en NCWI.
- Experimentos controlados en bloques de concreto intactos y agrietados bajo temperatura y humedad estables.
- Análisis de los cambios relativos de velocidad en función de los parámetros de bombeo.
Principales resultados:
- Las duraciones de bombeo más largas se correlacionan con cambios relativos de velocidad más grandes, sugiriendo una apertura/deslizamiento progresiva de las grietas.
- Las amplitudes de bombeo descendentes dan como resultado cambios de velocidad más pequeños, lo que indica una recuperación incompleta del material.
- Se observaron cambios relativos de velocidad consistentemente más altos en el bloque de concreto dañado en comparación con el intacto.
Conclusiones:
- El protocolo de bombeo, incluida la duración y el historial de amplitud, impacta significativamente los resultados de NCWI.
- La respuesta dependiente del tiempo del material es un factor crítico en la interpretación de NCWI.
- Los protocolos de bombeo consistentes y optimizados son esenciales para un monitoreo in situ confiable con NCWI.
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