| Title |
Permeability of Magnetic Flux of PS Steel for Variation of Stress and Temperature |
| Authors |
박진수(Park, Jin Su) ; 김병화(Kim, Byeong Hwa) |
| DOI |
https://doi.org/10.12652/Ksce.2022.42.3.0323 |
| Keywords |
자속투과율; 프리스트레스 콘크리트; 스트랜드; 긴장응력 Permeability of magnetic flux; Prestressed concrete; Strand; Prestress |
| Abstract |
An experimental study was conducted to investigate the effect of applied tensile force and temperature on the permeability of magnetic flux in prestressing steel. The permeability of magnetic flux is the ratio at which the magnetic flux between two points passes. The prestressing steel used in these experiments included a 7-mm PS wire mainly used for cable-stayed bridges and a 12.7-mm PS strandfor prestressed concrete bridges. The experiments to extract the permeability of the magnetic flux of steel wire and strand were conducted under various tensile levels and temperature conditions. From the experimental results, it was observed that the permeability of magnetic flux of the PS tension material was linearly proportional to the applied tensile stress level, and inversely proportional to the temperature. If the experimental relationship among the magnetic permeability, temperature, and prestressing ratio of a PS tensionmaterial is known in advance, the current tension stress level on PS members can be evaluated by measuring solely the magnetic permeability and temperature. |