Seismic Response Analysis of Rocking Piers with Different Mass Ratios

The rocking pier relaxes the constraints between the pier and the superstructure and foundation, and connects the pier and adjacent components as a whole through unbonded prestressed tendons. The rocking pier will continue to lift and close under the action of earthquake, and the rocking behavior occurs. The ratio of the mass of the superstructure to the pier usually affects the seismic response of the pier. In order to explore the influence of this factor, this paper deeply studies the seismic response of the rocking pier under different mass ratios. The research results show that the lower mass ratio will lead to the smaller inertial force at the top of the pier, so the dynamic response of the rocking pier is smaller, and the increase of the mass ratio has a limited impact on the dynamic response of the pier. At the same time, under different mass ratios, the displacement response of the damped pier may be greater than that of the undamped pier, because the damping will hinder the reset of the pier to a certain extent, resulting in an increase in the dynamic response of the pier.