やや長周期地震動評価のための半経験的地震動合成法

概要

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Based on review of former research works on a semi-empirical method for synthesizing strong ground motions, a general expression was proposed in this paper by making rearrangement dividing contents of the former research works into three elements, (1) a slip-correction function representing the difference between the rise time of a large earthquake and one of a small earthquake, (2) a function of fault failure pattern in large earthquakes, and (3) a function representing characteristics of ground motion in small earthquakes. In this process, it was clarified that valleys of spectral amplitude in the intermediate- period range of ground motion in a large earthquake evaluated by former methods were caused by not only dividing faults of a large earthquake into equal size parts, but also using Haskell's model as forming a slip model. In order to improve this point, a new slip-correction function not producing valleys of spectral amplitude in the intermediate-period ranges was proposed. Lastly, the proposed method was proved by simulation analysis using co model which expresses statistically well characteristics of real ground motions.
社団法人日本建築学会の論文
1997-09-30