Research on Hybrid Seismic Response Control System for Motion Control of Two Span Bridge

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Heo, G.^1 ; Kim, C.^2 ; Jeon, S.^2 ; Seo, S.^3 ; Jeon, J.^1

Department of Civil Engineering, Konyang University, 121 Daehangro, Nonsan, Chungcheongnam-do, Korea, Republic of^1

Department of Civil Engineering, Chungnam National University, 99 Daehangno, Daejeon, Korea, Republic of^2

Department of Civil Engineering, Chungnam State University, 55 Haksa-gil, Cheongyang-eup, Chungcheongnam-do, Korea, Republic of^3

关键词: Basic structure;    Passive types;    Reinforced rubber;    Rubber bearing;    Seismic load;    Seismic response control;    Shaking table tests;    Two span bridge;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012043/pdf
DOI  :  10.1088/1742-6596/744/1/012043

来源: IOP

【 摘 要 】

In this paper, a hybrid seismic response control (HSRC) system was developed to control bridge motion caused by seismic load. It was aimed at optimum vibration control, composed of a rubber bearing of passive type and a MR-damper of semi-active type. The bridge model was built for experiment, a two-span bridge of 8.3 meters in length with the HSRC system put up on it. Then, inflicting El-centro seismic load on it, shaking table tests were carried out to confirm the system's validity. The experiments were conducted under the basic structure state (without an MR-damper applied) first, and then under the state with an MR-damper applied. It was also done under the basic structure state with a reinforced rubber bearing applied, then the passive on/off state of the HSRC system, and finally the semi-active state where the control algorithm was applied to the system. From the experiments, it was observed that collision rather increased when the MR-damper alone was applied, and also that the application of the HSRC system effectively prevented it from occurring. As a result, the HSRC system was proven to be effective in mitigating responses of the two-span bridge under seismic load.