黏滞阻尼器凸轮式响应放大单自由度减震体系的地震反应分析

In order to study the damping control effect of the cam-type response amplification device of viscous damper, based on the existing research on its working mechanism and damping force calculation formula, the motion equation and energy equation of single-degree-of-freedom system with viscous damper cam-type response amplifier were established, and the seismic responses of single-degree-of-freedom system with viscous damper and with cam-type response amplification device of viscous damper were analyzed and compared respectively. By using viscous dampers with the same damping coefficient, the control effect analysis and energy analysis under frequent earthquakes were carried out. By using viscous dampers with different damping coefficients with the same displacement control effect under El Centro wave, the control effect analysis and energy analysis under rare earthquakes were carried out. The results show that the device plays an obvious amplification role of displacement, velocity, damping force and other responses in all levels of earthquakes. Installing damper with smaller damping coefficients can achieve the same damping and energy dissipation effects as directly installing dampers with larger damping coefficients, showing the advantage of no displacement failure risk under the action of all levels of earthquakes.