The bearing behaviour of coupling joint cross-sections of existing post-tensioned concrete bridges is determined for the evaluation of the fatigue safety by using non-destructive long term measurements under service conditions. For this, the crack behaviour is observed with crack width sensors over the height of the web, and the temperature and traffic loading of the structure are calculated parallel from the measurement of cross-sectional temperatures and strains. The achieved results serve for the calibration of a finite element simulation of the cross-section. With this the moment-stress-relation of the cross-section is obtained without a direct measurement of the reinforcement strains. Afterwards a verification of the service strength of the cross-section has been carried out by using the obtained moment-stress-relation and the risk of a fatigue failure for the coupling joint is determined.
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The bearing behaviour of coupling joint cross-sections of existing post-tensioned concrete bridges is determined for the evaluation of the fatigue safety by using non-destructive long term measurements under service conditions. For this, the crack behaviour is observed with crack width sensors over the height of the web, and the temperature and traffic loading of the structure are calculated parallel from the measurement of cross-sectional temperatures and strains. The achieved results serve for...
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