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논문 기본 정보

자료유형
학술저널
저자정보
Zhang, Dan (School of Earth Sciences and Engineering, Nanjing University) Wang, Jiacheng (School of Earth Sciences and Engineering, Nanjing University) li, Bo (School of Earth Sciences and Engineering, Nanjing University) Shi, Bin (School of Earth Sciences and Engineering, Nanjing University)
저널정보
테크노프레스 Smart structures and systems Smart structures and systems 제18권 제6호
발행연도
2016.1
수록면
1,203 - 1,215 (13page)

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When strain sensing cables are under long-term stress and cyclic loading, creep may occur in the jacket material and each layer of the cable structure may slide relative to other layers, causing fatigue in the cables. This study proposes a device for testing the fatigue characteristics of three types of cables operating under different conditions to establish a decay model for observing the patterns of strain decay. The fatigue characteristics of cables encased in polyurethane (PU), GFRP-reinforced, and wire rope-reinforced jackets were compared. The findings are outlined as follows. The cable strain decayed exponentially, and the decay process involved quick decay, slow decay, and stabilization stages. Moreover, the strain decay increased with the initial strain and tensile frequency. The shorter the unstrained period was, the more similar the initial strain levels of the strain decay curves were to the stabilized strain levels of the first cyclic elongation. As the unstrained period increased, the initial strain levels of the strain decay curves approached those of the first cyclic elongation. The tested sensing cables differed in the amount and rate of strain decay. The wire rope-reinforced cable exhibited the smallest amount and rate of decay, whereas the GFRP-reinforced cable demonstrated the largest.

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