Free vibrations and seismic responses of Shin Saikai Bridge and Saikai Bridge

摘要

This paper discusses natural vibration properties of the Shin Saikai Bridge and the Saikai Bridge which are famous arch bridges in Japan, based on the original cross sections using 3D FE model and compared with experimental results. The seismic response characteristics and seismic safety are examined by carrying out nonlinear seismic analysis under the Level 2 earthquakes in order to check seismic safety of the Shin Saikai Arch Bridger and gasp whether the Saikai Arch Bridge should be reinforced against the strong earthquake.