Abstract
A long period of time has passed since the design of the steel bridge has shifted to Guideline based design. But, creating materials to obtain consultation / confirmation / approval with the client in detailed design depends on the experience of the engineers. There are many solutions where the sum of the material cost and the production cost becomes minimum according to the change position of the cross section. Therefore, in order to smoothly carry out consultation and approval, it is necessary to select and explain and compare alternatives appropriately.
In this study, we proposed a tool to retrieve alternative proposals by GA which minimizes the sum of material cost and production cost for each number of parts. It was targeted the steel continuous girder bridge of the MLIT (Ministry of Land, Infrastructure, Transport and Tourism) type and former JH (Japan Highway) type. It showed that the method of extracting, evaluating and comparing multiple alternatives that minimize the sum of material cost and manufacturing cost in determining cross-sectional change position is effective for detailed consultation and approval.
