This paper is concerned with base-isolation and vibration control system with passive friction dampers settled at the steel column bases of a building. The cost of the new base-isolation system is lower than that of the past one because of omitting the base-isolated layers. However, the new base-isolation system has some problems that the slip load changes in conjunction with the varying axial force of the columns and the residual displacement is not negligible. Numerical study of vibration control by base-isolation system with sliding in steel column bases is conducted. Finally, the paper concludes that the new system is effective in the base-isolation design of steel structures.
