Polylinear型の復元力特性をもつ１自由度系の地震入力エネルギーに関する研究

概要

論文の詳細を見る
This paper presents the prediction of damage-causing earthquake input energy used in energy-based seismic design. Structures concerned are single-degree-of-freedom systems having various polylinear load-displacement relationships. The apparent natural period of frames (the time required for one cycle of vibration), accompanied by plastic deformations during earthquakes, is longer than the initial natural period. Moreover, input energy depends primarily on the apparent natural period. For the prediction of input energy, this paper proposes use of the apparent natural period calculated from the mean of the plastic dissipated energy per half-cycle in the whole vibration. A close agreement between results of the proposed method and numerical response analysis is obtained.