Design Concept of Six Bridges in Sumida-river of the Tokyo Reconstruction Work in Taisho era and Design Process of Eitai Bridge and Kiyosu Bridge

Abstract

This thesis discusses on the design concept of six bridges in Sumida river constructed as the Tokyo reconstruction work in Taisho era and the design process of Eitai bridge and Kiyosu bridge based on descriptions written by Enzo Ota and Yutaka Tanaka who was engineers of the Bureau of Reconstruction. Especially it is argued that the most essential design consept of six bridges was to introduce long spanned plate girder structure into six bridges and Eitai bridge and Kiyosu bridge were designed as a set by making reference to the design competition for Koln bridge in 1911. Furthermore, it is showed that there is possibility Eitai and Kiyosu bridges were constructed as the groundwork for furure development of technology of long spanned bridges in Japan.