A program is developed with MATLAB language to conduct time-energy history analysis,according to the optimization results of lateral rigidness and damping ratio of isolation layer based on the energy criterion proposed by the authors,combining with an adding-storey project of a multi-storey RC frame structure using lead laminated rubber bearings(LRB).The characteristics of energy input,energy conversion and energy dissipation are analyzed under some typical earthquake ground motions considering the three es...