A simplified design method for structures with viscoelastic dampers considering soil-structure dynamic interaction effect

The dynamic equilibrium equation for single-degree-of-freedom (SDOF) structure with viscoelastic dampers considering soil-structure interaction (SSI) effect is firstly established in frequency domain, then the equivalent period and damping are obtained through the combination of modal stain energy (MSE) method and the transfer function of the system. Parametric analysis is also conducted to study the SSI influence on the efficiency of the dampers, the results show that the slenderness ratio of the structure and the initial additional damping have a significant influence on the efficiency of the dampers. The proposed simple method is also used to multi-degree-of-freedom (MDOF) frame energy dissipating structures with relatively uniform mass and stiffness distribution. The numerical results demonstrate that this method has a good accuracy, which has an available application value in the evaluation of energy dissipating structures considering SSI effect.