An Innovative Smart Concrete Anchorage with Self-Stress Sensing Capacity of Prestressing Stress of PS Tendon.
Sensors (Basel)
; 21(15)2021 Aug 03.
Article
em En
| MEDLINE
| ID: mdl-34372487
ABSTRACT
An innovative smart concrete anchorage (SCA) has been developed for monitoring the stress of prestressing (PS) tendons by utilizing smart ultra-high-performance concrete (UHPC). The smart UHPC contained 2 vol% steel fibers and fine steel slag aggregates instead of silica sands. The effects of different electrode materials, arrangements, and connectors on the self-stress sensing capacity of the SCA are discussed. A prototype SCA demonstrated its feasibility and sufficient self-stress sensing capacity to be used in monitoring the prestressing loss of the PS tendon. As the tensile stress of the PS tendon increased from 0 to 1488 MPa, the fractional change in resistivity (FCR) of the prototype SCA, with horizontally paired copper wire electrodes and a plug-in type connector, decreased linearly from 0% to -1.53%, whereas the FCR increased linearly from -1.53% to -0.04% as the tensile stress of the PS tendon decreased from 1488 to 331 MPa.
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Aço
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Materiais de Construção
Idioma:
En
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Sensors (Basel)
Ano de publicação:
2021
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Article