Heat Straightening Repair of Damaged Steel Bridge Girders - Fatigue and Fracture Performance
Heat-Straightening Repair of Damaged Steel Bridge Girders: Fatigue and Fracture Performance
Based on the results of this research, the effect of damage and subsequent heat-straightening
repairs on the fatigue and fracture performance of steel girders has been established. Results of
the fatigue testing strongly suggest a consistent decrease in base metal fatigue life following the
third repair at the same location. As a result, it is recommended to limit the number of heatstraightening
repairs at the same location to two. After the third damage and repair (D/R) cycle, the
fatigue testing showed a substantial decrease in the fatigue life at some details, along with a
moderated decrease in base metal fracture toughness where the impact occurred.
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