Design optimization of friction damper with coupling mechanism for seismic response of base isolated structure

To avoid or mitigate the damage that is caused by such excessive displacement, a new device is proposed for controlling seismic displacement of base isolated structure by the means of a friction damper with coupling mechanism. The structure and the working principle of the damper are introduced. In view of the friction damper with mechanism as security device for control the displacement of isolation layer, taking a 2-layer sliding wooden residential structure as an example, the design of damper parameters is optimized by the Sequential Quadratic Programming method. The parameter optimization objective function and constrains was established, and the parameter optimal solution of friction damper was obtained. The numerical examples show that the method is applied in the process of the vibration control design has stronger practicability and effectiveness.