Effect of Surface Pressure/Velocity Dependence of Friction Coefficient on Seismic Response of Sliding Base Structure Based on Shaking Table Test

Abstract

Sliding base (SB) structures are attracting attention as one of the means of improving the seismic performance of detached houses, which is a seismic isolation technology that can be introduced relatively low cost. In the seismic safety evaluation of SB structures, it is necessary to design the friction coefficient of the sliding surface appropriately. It has been pointed out that the friction coefficient depends on the increase and decrease of surface pressure due to rocking of the building and the variation of sliding speed. However, the effect of these dependencies on response of the building is unclear. In this study, we conducted simulation analyses with and without each dependency, targeting the shaking table test of a full-scale two-story wooden building applied to the SB structure. Based on these analyses, the effects of each dependence on the response of the sliding foundation are discussed.