Investigation of reinforced concrete members with bond deterioration under tensile load

A.I. Quadri

doi:10.3989/mc.2023.297522

Autores/as

A.I. Quadri Civil Engineering Department, Yokohama National University https://orcid.org/0000-0001-5328-9379

DOI:

https://doi.org/10.3989/mc.2023.297522

Palabras clave:

Pérdida de adherencia, Fisuras, Vigas de extremo entalladas, Análisis FEM, Pull out

Resumen

Frecuentemente, la pérdida de adherencia en las estructuras de hormigón armado (RC) está causada por el envejecimiento, factores ambientales, sobrecarga o diseño deficiente. Este deterioro puede hacer que la estructura pierda su estética y, finalmente, colapse. El comportamiento de las estructuras que exhiben deterioro de la adherencia es poco conocido y mal entendido. En este documento se presenta la respuesta de las estructuras RC que exhiben pérdida de adherencia bajo carga de tensión. Con el fin de comprender el impacto de la pérdida de adherencia en el compuesto RC, se construyó dicho sistema para ensayos “pullout” y, posteriormente, se expandió a la esquina de los extremos de las vigas entalladas de RC. Además, el sistema se examinó analíticamente utilizando FEmodel de 3 dimensiones. La pérdida de adherencia creó una zona débil con fisuras internas paralelas al eje de la barra. La sección de la punta se separó de toda la profundidad del extremo perforado, mientras que el refuerzo del gancho resistió las fisuras de tensión diagonal. Por lo tanto, la sección no entallada se debe tener más en cuenta durante el monitoreo y el mantenimiento.

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Citas

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