Impact of Rocking Motion of Shaking Table on Vibration Characteristics of Reinforced Concrete Building in a Large Shaking Table Test

Abstract

Natural period and damping ratio are important vibration characteristics in seismic design. These characteristics can be evaluated using the public database of the 3-D Full-Scale Earthquake Testing Facility of the NIED, referred to as E-Defense. However, it has been pointed out that the rocking motion of a shaking table influences the vibration characteristics when superstructure weight is large. A larger than typical damping ratio has been observed for a few specimens in a previous study. This study focuses on the impact of the rocking motion of a shaking table with a large weight RC specimen as the target. Moreover, the vibration characteristics are corrected based on the rocking motion and evaluated using a system identification approach.