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- Title
An Innovative Smart Concrete Anchorage with Self-Stress Sensing Capacity of Prestressing Stress of PS Tendon.
- Authors
Lee, Seon Yeol; Le, Huy Viet; Kim, Min Kyoung; Kim, Dong Joo; Park, Jongwoong
- 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.
- Subjects
HIGH strength concrete; PRESTRESSED concrete beams; ANCHORAGE; CONCRETE; COPPER electrodes; TENDONS; PRESTRESSED concrete
- Publication
Sensors (14248220), 2021, Vol 21, Issue 15, p5251
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s21155251