{"_buckets": {"deposit": "f1ce2fab-d1cd-4568-b4fa-aeb8c93a60c1"}, "_deposit": {"id": "32909", "owner": "1", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "32909"}, "status": "published"}, "_oai": {"id": "oai:repository.dl.itc.u-tokyo.ac.jp:00032909", "sets": []}, "author_link": ["128332", "128333", "128334", "128329", "128330", "128331"], "item_4_alternative_title_1": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "\u5468\u671f\u7279\u6027(3-15\u79d2)\u3092\u8003\u616e\u3057\u305f\u65e5\u672c\u5404\u5730\u306b\u304a\u3051\u308b\u5730\u9707\u52d5\u306e\u5897\u5e45\u5ea6\u5206\u5e03"}]}, "item_4_biblio_info_7": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1985-03-30", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "4", "bibliographicPageEnd": "500", "bibliographicPageStart": "467", "bibliographicVolumeNumber": "59", "bibliographic_titles": [{"bibliographic_title": "\u6771\u4eac\u5927\u5b78\u5730\u9707\u7814\u7a76\u6240\u5f59\u5831 = Bulletin of the Earthquake Research Institute, University of Tokyo"}]}]}, "item_4_description_13": {"attribute_name": "\u30d5\u30a9\u30fc\u30de\u30c3\u30c8", "attribute_value_mlt": [{"subitem_description": "application/pdf", "subitem_description_type": "Other"}]}, "item_4_description_5": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "The increasing number of structures with long natural periods (between 3 sec and 15 sec) makes it necessary to study the strongmotion characteristics in this period range. The damping coefficient of these objects is small and it may cause serious damage at the resonance period. The authors propose the method for estimating the site amplification factors in terms of period by analyzing the large number of strong-motion displacement records of the Kita-Mino earthquake of August 19, 1961, Japan. The observed spectra corrected for the geometrical spreading of surface waves and attenuation factor were compared with the synthetic spectra computed utilizing the normal mode solution. Good agreement was obtained between observations and synthetics at the stations close to the epicenter which are located on the standard crustal structure, so that the difference between the observed and synthetic spectral amplitudes at the other stations reflect the site amplification factor. The site amplification factor, ratios of observed spectra to synthetics, distribute from 0.3 to 14. At certain sites, they strongly depend on period.", "subitem_description_type": "Abstract"}, {"subitem_description": 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