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In general, designing a structure that minimizes a total cost, including not only construction but also repairing costs after severe earthquake, requires considerable number of calculations in a trial-and-error basis. In this research, a new design nomograph that gives combinations of demanding natural period, ductility and yielding coefficient in view of minimizing a total cost of structure is proposed by means of nonlinear numerical simulations. It is clarified through comparison of the nomograph and current design spectra based on past earthquake records that the structures comply with current design code meet the demands of preventing severe damage and minimizing the total cost simultaneously.

A NEW SEISMIC DESIGN METHOD FOR RAILWAY STRUCTURES CONSIDERING TOTAL COST