*Case 4.D [#ve827269]
**The causes of fatigue [#q1537c13]
>
The structure behaved in a manner not expected such as due to vibration. 
**Approaches to repairing and retrofitting [#c15e3afc]
>
re-weld + post weld surface treatments. 
>
**LINK [#o4f110ec]
-[[Shinkansen Bridges in Japan. End of vertical stiffener, vibration due to rapid train]] 
-[[Shinkansen Br. (ends of vertical stiffener)]] 
>
re-welds + TIG
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