Abstract
If fatigue damage or its possibility can be estimated easily and economically, the efficiency of maintenance inspection for steel bridges is considered to be drastically advanced. For this purpose, a system in which thin stainless steel with a crack is stuck on a bridge to measure crack propagation and the cumulative amount of fatigue damage has been developed. In this study the quantitative relationship between an amount of crack propagation and the fatigue damage has been made clear, and the applicability of the fatigue damage monitoring sensor and its accuracy have been examined through an analysis of stress intensity factor range the and a fatigue crack propagation test.
