Experimental Evaluation of Prestress Force in Tendons for Prestressed Concrete Girders using Sensors

계측 센서를 활용한 PSC 거더 텐던의 긴장력 측정 실험

  • Received : 2015.10.26
  • Accepted : 2015.11.30
  • Published : 2015.12.29


The prestressing force has not been managed after construction nevertheless it is one of the importrant factors that maintain the structural safety of PSC girder bridges. The prestressing force is just measured during construction using jacking device and after that, it can not be managed practically. For this reason, this study investigated the measurements of prestress using embedded sensors that can be available now with an ultimate goal to propose smart prestressed girders that can measure the prestress from the birth to the end of service life. 4 types of sensors were installed on the small prestressed girders, and the applicability and the accuracy of those sensors were tested while the prestress was applied to the girders. The results show that a center-hole type loadcell has a tendency to measure a prestressing force higher than a reference value, especially when it is loaded with an eccentricity. a EM sensor shows several advantages that has a good practical accuracy, that can be installed anyplace along the tendons.


PSC girder;prestress evaluation;loadcell;EM sensor


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Cited by

  1. Construction Condition and Damage Monitoring of Post-Tensioned PSC Girders Using Embedded Sensors vol.17, pp.8, 2017,
  2. Damage Detection with FBG Sensors for Pre-Stress Concrete Girders vol.737, pp.1662-9795, 2017,
  3. Magnetic Hysteresis Monitoring according to the Change of Tensile Force and Steel Class of PS Tendons vol.31, pp.2, 2018,


Supported by : 국토교통부