PSI - Issue 5

Takahide Sakagami et al. / Procedia Structural Integrity 5 (2017) 1370–1376 Takahide Sakagami/ Structural Integrity Procedia 00 (2017) 000 – 000

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Fig. 3 Fatigue testing machine

Fig. 4 Relationship between stress intensity factor range and crack propagation rate obtained by TSA technique

5. Experimental study for actual steel bridge

Fatigue cracks were found in the structural members of the Seto-Ohashi Bridges connecting the Honshu and Shikoku islands in Japan during their 21st-year inspection. Several repair works were applied to the structural members. The stress distributions around the fatigue cracks were measured before and after the repair works by the TSA technique when live loading acted on the bridge and the effectiveness of the severity reduction using these repair methods was investigated (Sakagami 2017).

Fig. 5 Objective member and repair method for evaluating stress severity reduction after repair work