THE MODE-SUPERPOSITION METHOD FOR PASSIVE ENERGY DISSIPATION STRUCTURES BASED ON PERTURBATION METHOD AND EQUIVALENT LINEARIZATION

It is an economical and effective method to enhance the aseismatic capability of buildings by using passive energy dissipation structures. But in the analysis of this type of structure with mode-superposition response spectrum method based on equivalent linearization, it is rather difficult and time-consuming to obtain satisfactory results. An accurate expansion method for modes based on the improved first-order perturbation is presented in this paper. A relatively uncoupled mode-superposition method and a modified first-order perturbation method are derived. A numerical example shows that the present strategy is correct and effective.