A Study on Transition of Dynamic Characteristics of R/C High-Rise Residence Based on Seismic Observation and Seismic Response Analysis

Abstract

From 1999 to the present, earthquake observations have been carried out on super high-rise RC structures. We examined the predominant frequency and damping ratio of the building using observation records. It was showed that the predominant frequency decreased and the damping ratio increased after a large earthquake. Both the predominant frequency and the damping ratio depend on the maximum relative displacement of the roof floor to the basement floor. For the observation records, A bending shear model used in the seismic response analysis at the time of design was set at the base of the model with a rotating spring and a dashpot based on the thin layer method.