History のバックアップ(No.2)

History †

M bridge in Japan
Defects in the butt welds of bottom flange.
Bolted splice.
Cut-out-web details of Highway and Railway bridges.
Stress component in the normal direction of the corner.
Bolted splice.
Sole-plate detail of highway bridges.
Secondary stresses due to the loss of rotational and sliding function of bearing.
Bolted splice.
Through-type arch bridges.
Vibration due to wind.
Bolted splice, change of connection detail.

Quinnipiac River Br.
Defects in the butt welds of horizontal stiffener.
Bolted splice, stop holes.
Yellow Mill Pond Br.
Cover plate ends, stress concentration.
Bolted splice, Cover plate end, TIG, Peening.
Cleveland I-90
Vibration while the girders carried by train.
Stop holes.
Aquasabon River Br.
Defects in the short groove weld in the web.
Bolted splice.
Jhojuin Br.
Fix-end moment at the connection of truss chord and floor beam.
Attaching new connection plate.
Komazawa Br.
Fix-end moment at the connection of arch rib and column.
Bolted splicing.
Shinkansen
Vibration due to the passage of rapid train.
Rewelding + TIG

Displacement induced cracking.
Rewelding + UIP.

Deck-type two hinge arch bridge and two simply supported girders.
Stop holes, bolted splice and installing bracket, improving details.