減衰定数一定の弾塑性応答スペクトルに基づく建物固有周期の遷移の解明

概要

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A theoretical approach of elasto-plastic response with constant damping factor is proposed to evaluate transition of natural periods of buildings. The spectrum of the elasto-plastic response is equivalent to that of visco-elastic response in following respects: both values of dissipative energy during one cycle are exactly same, shapes and amplitudes of both spectra are approximately same, the spectrum of elasto-plastic system shows linear response with fluctuations in amplitudes of input motions. The equivalent period of elasto-plastic system indicates significant relation between response amplitude of the system. This mechanism gives appropriate interpretation on the observed transition of natural periods of buildings.
2006-02-28