文档介绍：: .
ect of the Korean war was
slowly recovered, the constructions of bridges started for the economic
development.
v The major type of highway bridges was rolled beam bridges.
7Industrialization (1970-1980)
v The steel bridge technology in Korea was abruptly improved after
completion of the first steel mill company, POSCO (Pohang Iron & Steel
Company) in 1968.
v The welded plate girder bridge began to prevail from the early 1970s.
v The Sung-su bridge completed in 1979 and the Sung-san bridge built in
1980 were the typical bridges which are erected with the welded steel
plate produced by POSCO.
Sung-su bridge (1979) Sung-san bridge (1980)
Night view of POSCO
8Adapting advanced technology (1980-1990)
v After getting enough experience in bridge design and construction in
1970s, Korean government encouraged to import advanced foreign
bridge technology.
Busan bridge (1981) Jindo 1 bridge (1984) Dolsan bridge (1984)
Wando 2 bridge (1985) Jeodo bridge (1987)
9The cost of industrialization (collapse of bridges)
v Collapse of Sungsu Bridge(1994)
Cause of Collapse of Sung-Su Bridge
§ Design : fracture critical pin
connection system
§ Construction : poor welding
à reduction of fatigue life
§ Poor manufacturing of pin plate
§ Neg