日本建築学会技術報告集
Online ISSN : 1881-8188
Print ISSN : 1341-9463
ISSN-L : 1341-9463
アスペリティモデルに対する震源近傍の地震動評価 : 各種強震動予測手法による評価結果の相互比較(構造)
山添 正稔武村 雅之加藤 研一
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2003 年 9 巻 17 号 p. 77-82

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Near-fault strong motions from the asperity model are evaluated by the Kamae and Irikura's (KM) and Takemura and Ikeura's (TI) method. KM explicitly considers the asperity, whereas TI assumes uniform heterogeneity on the fault. In the period range shorter than 1 sec, both methods give the same amplitude of response spectra. On the contrary, remarkable difference can be found at the predominant period of 2 sec, in particular, in the direction of rupture propagation. This difference is attributed to the rupture directivity effect caused by the asperity. It is crutial to understand the difference when the stochastic methods are applied to the prediction of strong motions.
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© 2003 日本建築学会
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