Abstract
In this paper, an analytical method for estimating the capacity of energy absorption of a structural system with a hysteretic restoring force subjected to seismic excitation is proposed. Using a single-degree-of-freedom system with bilinear restoring force, the conventional equation for calculating the capacity of energy absorption has been presented by applying the method of equivalent linearization, which represented the reduction of input energy due to the absorbed energy of the hysteretic restoring force. Finally, it is clear that the calculated capacity of energy absorption by the proposed method almost agrees wih that obtained through the response analysis using several real earthquake motions.
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