The motivation of this paper is to identify the variation of stress filed in multi-strand tendon anchorage system using electromechanical impedance measurement. To achieve the objective, the following approaches are implemented. Firstly, stress variation in multi-strand anchorage system due to strand breakage is analyzed to determine the location of impedance acquisition. Secondly, a piezoelectric-based interface technique is designed to localize the damage strand. Lastly, the conceptual design of the PZT-interface is preliminarily verified by an experimental test. Impedance signatures obtained from PZT-interface are quantified by using RMSD index (root-mean-square-deviation). The result shows that the PZT-interface technique is promisingly to identify damage strands.

Abstract
 1. Introduction
 2. Stress Field Change Monitoring Method
  2.1 Stress field change due to strand breakage
  2.2 Design of piezoelectric-based interface for strand breakage identification
  2.3 Impedance-based stress field monitoring
 3. Experiment Verification
 4. Conclusion
 References

• 김정태(Department of Ocean Engineering, Pukyong National University) | Kim Jeong-Tae
• 이소영(Department of Ocean Engineering, Pukyong National University) | Lee So-Young
• 후인탄칸(Department of Ocean Engineering, Pukyong National University) | Huynh Thanh-Canh
• 당넉로이(Department of Ocean Engineering, Pukyong National University) | Dang Ngoc-Loi