Capacidad de carga en tubos de hormigón reforzados con fibras híbridas. Evaluación experimental y teórica
Date
2021-05-14
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Actualmente se ha extendido el uso de fibras de acero como refuerzo en tubos de
hormigón premoldeados. Sin embargo, la combinación de fibras de diferentes
materiales, geometría o propiedades mecánicas podría brindar resultados de
refuerzo más óptimos, controlando la fisuración a distintas escalas, edades y niveles
de deformación del hormigón. El hormigón reforzado con dos o más tipos de fibras
diferentes se denomina Hormigón reforzado con fibras híbridas (HRFH). En este
trabajo se presentan los resultados de ensayos en tubos de HRFH (THRFH) de 600
mm de diámetro. La capacidad de carga de los THRFH es comparada con la
obtenida en tubos de hormigón reforzado con fibras de acero (THRFA) y tubos de
hormigón reforzados con armadura convencional (THA), elaborados y ensayados en
la misma campaña. Adicionalmente, los resultados experimentales se utilizan para
calibrar un modelo teórico para la estimación de la capacidad de carga de los
THRFH. Los THRFH alcanzaron una capacidad de carga equivalente a la de los
THA y superior a la de los THRFA. Además, mediante el modelo teórico se han
obtenido valores razonables en la estimación de la capacidad de carga de los
THRFH, teniendo en cuenta la gran cantidad de variables involucradas.
The use of steel fibers as reinforcement in precast concrete pipes has now become widespread. However, the combination of fibers of different materials, geometry or mechanical properties could provide more optimal reinforcement results, controlling cracking at different scales, ages and levels of concrete deformation. Concrete reinforced with two or more different types of fibers is called Hybrid Fiber Reinforced Concrete (HFRCP). In this paper, the results of tests in HFRC pipes (HFRCP) of 600 mm diameter are presented. The bearing capacity of HFRCP is compared with that obtained in steel fiber reinforced concrete pipes (SFRCP) and conventional reinforced concrete pipes (RCP), elaborated and tested in the same campaign. Additionally, the experimental results are used to calibrate a theoretical model for estimating the bearing capacity of HFRCP. HFRCP reached a bearing capacity equivalent to that of RCP and higher than that of SFRCP. In addition, through the theoretical model, reasonable values have been obtained in the estimation of the bearing capacity of THRFH, taking into account the large number of variables involved.
The use of steel fibers as reinforcement in precast concrete pipes has now become widespread. However, the combination of fibers of different materials, geometry or mechanical properties could provide more optimal reinforcement results, controlling cracking at different scales, ages and levels of concrete deformation. Concrete reinforced with two or more different types of fibers is called Hybrid Fiber Reinforced Concrete (HFRCP). In this paper, the results of tests in HFRC pipes (HFRCP) of 600 mm diameter are presented. The bearing capacity of HFRCP is compared with that obtained in steel fiber reinforced concrete pipes (SFRCP) and conventional reinforced concrete pipes (RCP), elaborated and tested in the same campaign. Additionally, the experimental results are used to calibrate a theoretical model for estimating the bearing capacity of HFRCP. HFRCP reached a bearing capacity equivalent to that of RCP and higher than that of SFRCP. In addition, through the theoretical model, reasonable values have been obtained in the estimation of the bearing capacity of THRFH, taking into account the large number of variables involved.
Description
Keywords
Hormigón reforzado, Fibras híbridas, Fibras de acero, Tubos-ensayos
Citation
26º Jornadas Argentinas de Ingeniería Estructural, edición virtual (2021)
Endorsement
Review
Supplemented By
Referenced By
Creative Commons license
Except where otherwised noted, this item's license is described as openAccess