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Life cycle detection of prestress in large prestressed reinforcement structures

  • Life Cycle Technology And Life Cycle Assessment
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Abstract

To monitor the stress state of prestressed reinforcement in large reinforcement prestressed structure, two sensing structures, namely the direct spiral-winding structure and sawtooth modulated structure, were designed based on the ordinary communication optical fiber. The sensing theories were analyzed, and the experimental studies were also carried out. The quasi-distributed sensing system based on optical time domain reflective technology was established. The detection wavelength and spatial resolution were analyzed, and the estimation formula of maximal number of sensing point was also given. The results show that the system can realize the quasi-distributed test of measurand with single fiber, which helps to simplify the in-out wires. Moreover it can take on the important task of long-term and continuous monitoring of prestress, which helps to realize the life cycle detection of prestress, and play an important role in the estimating of bridge health state.

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Authors and Affiliations

  1. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, 100044, Beijing, China

    Jin Xiu-mei (Doctoral candidate)

  2. Structural Health Monitoring and Control Institute, Shijiazhuang Railway Institute, 050043, Shijiazhuang, China

    Du Yan-liang & Sun Bao-chen

Authors
  1. Jin Xiu-mei
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  2. Du Yan-liang
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  3. Sun Bao-chen
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Corresponding author

Correspondence to Jin Xiu-mei.

Additional information

Foundation item: Project (50278058) supported by the National Natural Science Foundation of China

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Jin, Xm., Du, Yl. & Sun, Bc. Life cycle detection of prestress in large prestressed reinforcement structures. J Cent. South Univ. Technol. 12, 90–94 (2005). https://doi.org/10.1007/s11771-005-0017-x

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  • DOI: https://doi.org/10.1007/s11771-005-0017-x

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