Continuous Monitoring of Force and Elongation During stressing of Tendons.

摘要

The behavior of prestressed structures is very sensitive to the force introduced by the prestressing tendons. Therefore the stressing operation has to be done with great care. The accuracy of the introduced prestressing force is usually checked on site by manually measuring the jacking force and the related elongation of the tendons 2 or 3 times during the stressing operation. These values are written in the stressing records. This documentation is insufficient as problems or errors can not be seen form the listed numbers. To overcome this problem a measuring system for continuous monitoring of force and elongation during stressing of tendons has been developed which is robust and can easily be used by engineers on side.