*Case 3.H [#a1ca9f79] **The causes of fatigue [#oe3c3441] > Stresses and deformations unforeseen in design occurred. **Approaches to repairing and retrofitting [#i2ef8d60] > Modification of connection detail. > **LINK [#m1b96f69] -[[Deck-type two hinge arch Br.]] > Improving gusset details -[[Shinkansen Br. (fatigue cracks at main girder - floorbeam connection)]] > Connection plates by bolted splice. -[[Jhojuin Br. (connection plates between floor beams and truss chords)]] > Connection plates by welding. -[[Deck-type curved-chord warren truss bridge]] > Flange connection -Tomei Ex. Bridges, cross bracing connection plate. > Adding cross frames and stringers. -[[Polk County Br.]] > Bolt connection plate to top flange. -[[Platte-Winner Br.]] > Stop hole and Dog bone -[[2680 Br.]] > Stop hole and Angle connection -[[Thomas Br.]] > Stop hole and Positive attachment -[[Lehigh Canal and River Br.]] > Plate removal -[[Daniel Boone Br.]] > Stop hole and Angle connection -[[I-470 and I-79 tied arch Br.]] > Stop hole and Angle connection -[[Section D10]] > Bolt splice -[[Poplar Street Br.]] > Stop hole and reweld and plate connection -[[Polk County Bridge, Iowa.]] -[[Polk County Br.]] > Gap increase and Bolt connection -[[Prairie Du Chien Bridge.]] -[[Prairie Du Chien Br.]] > Stop hole and Bolt splice -[[Walt Whitman Bridge, New Jersey.]] -[[Walt Whitman Br.]] > Restraint removal -[[Deck-type Arch bridge on Tomei Expressway]] > Stop hole and Plate connection -[[Sozuka-Ohhashi (at member connection)]] > Adding the diagonal member (Stop hole, Re-welding and Adding the members) -[[Sozuka-Ohhashi (at suspension member)]] > Replacement