Gas upset welding of steel bars used to reinforce concrete. Photograph courtesy of Professor Nobutaka Yurioka.
Failure of reinforcing bars at welded junctions in the columns supporting a highway, during the Hanshin earthquake. The fracture was initiated from a very thin oxide layer in a welded joint caused in a improper control in gas flame. Photograph courtesy of Professor Nobutaka Yurioka.
Failure of reinforced bar welds leading to gross failure during the Hanshin earthquake. Photograph courtesy of Professor Nobutaka Yurioka.
