熱弾性応力測定に基づく合成床版の疲労損傷評価

抄録

Steel-concrete composite deck bridge has a good durability, workability and economic efficiency. Fatigue crack initiates from weld toe of stud in the bridge by the cyclic shear loading. It is difficult to detect the crack initiation and propagation behavior of crack, because fatigue cracks are not open to inspection surface. In this study, crack propagation test was conducted for the specimen with stud. Thermoelastic stress measurement was applied to the evaluation of the fatigue crack propagation. It was found that the stress distribution on the opposite site of stud measured by thermography shows a characteristic change according to the crack propagation.