Earthquake Damage to Railroads

W. G. Byers Collection: 1978 Japan

	Image-B1951 The fault crossing the Inatori railway tunnel.
	Image-B2002 Constructed in 1959, the Gyoninzuka Viaduct was a rigid 2-column, reinforced concrete elevated railway bridge. The column heads were damaged by repeated bending and shearing loads.
	Image-B2003 Constructed in 1941, the Eaigawa Bridge was a deck girder bridge separated for each line of a double track. An oval pier supported by a well foundation was cut at the concrete construction joint, and was dislocated as much as 30 cm. in an orthogonal direction, causing a large track deformation.
	Image-B2004 The Tsutanigawa Bridge was a single track railway bridge 450 meters long, composed of prestressed concrete I-beams, prestresed concrete composite I-beams, and prestressed concrete simple T-beams. Some of the beams were damaged at the supporting points of the girder.
	Image-B2005 Rigid-frame elevated bridge for Shinkansen (Bullet Train). Girders were dislocated due to the failure of shoes. This was the most frequent type of damage to the Shinkansen bridges and was found along a total section of ca. 120 km. between Kunimi and Ichinoseki.
	Image-B2006 Natorigawa Bridge for Shinkansen (Bullet Train)

W. G. Byers Collection