Author(s)

J. Herter, R. Helmerich & K. Brandes

Abstract

Thousands of old riveted steel bridges are getting older all over the world. They are suffering from fatigue or other safety problems, caused by traffic loads, besides corrosion. The owners have a great interest in Non- Destructive evaluation of their today's remaining fatigue state. A lot of investigations in that field have been done at BAM and are just under way. Field tests and full scale fatigue test series on original bridges improve the basis for the fatigue assessment of existing steel structures. Some test results will be presented. The methodology of assessment is based on both, calculation and experimental investigation. In situ measurement of strains give information abou

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