Abstract
Possibility of rationalization of steel bridges by the use of high strength steel was investigatedd by design simulation based on limit state design method (Load and Resistance Factor design). Design target bridges are 3 kinds of composite continuous I girder bridge having standard span and width in Japan. Minimum weight sections were designed considering strength limit state (under service traffic and during construction), service limit state, fatigue and fracture limit state. As a result, it is confirmed that a section is decided by different limit state for each steel material. In particular, fatigue limit state has an considerable influence on design of high strength steel bridge.
