主催: 日本学術会議 メカニクス・構造研究連絡委員会
共催: 応用物理学会, 化学工学会, 土木学会, 日本風工学会, 日本機械学会, 日本気象学会, 日本計算工学会, 日本建築学会, 日本原子力学会, 日本航空宇宙学会, 日本地震工学会, 日本数学会, 日本数値流体力学会, 日本造船学会, 日本物理学会, 日本流体力学会, 日本レオロジー学会, 農業土木学会, 無機マテリアル学会
p. 44
Since earthquake ground motions involve various intrinsic and epistemic uncertainties, it is difficult even with the present knowledge to predict forthcoming events at a specific site in a reasonably accurate way. It is therefore desirable to develop a robust structural design method taking into account these uncertainties even partially. Critical excitation or worst-case analysis approaches are making remarkable progress recently and seem to be promising as a candidate to overcome such difficulties. In this paper, the power (area of power spectral density function) and the intensity (magnitude of power spectral density function) are fixed and the critical excitation is found under these restrictions. A design problem for restricted variable design earthquakes is formulated as a min-max problem which is expected to lead to the maximum global performance design for variable critical excitations. The elastic-plastic response characteristics of the building models designed by the present method are revealed for a broader class of excitations and code-specified design earthquakes.
