The Genealogy and the Background of Bridges Constructed in the High Economic Growth Period in Japan

Abstract

After World War 2, bridge technology in Japan has been developed rapidly with high economic growth. Consequently, it is thought that important bridges exist which denote bridge technology development. However, too many bridges were constructed to be found their value. Therefore in this research, the genealogy chart of bridges constructed at the high economic growth period was made through the document investigation and the hearing investigation, and bridges that had played an important role in that was specified, and the characteristic at the high economic growth period as the background of the bridge design was organized. As a result, 28 important bridges were specified, and it is clarified that there were “The engineer's challenge” and “Overcame of the construction condition” in the background of the bridge development. Additionally, it was confirmed that there were conversion periods in the design system and the design subject in 1960's.