{"_buckets": {"deposit": "d016cdcd-fd63-4b3f-b34c-349116bef244"}, "_deposit": {"id": "5957", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "5957"}, "status": "published"}, "_oai": {"id": "oai:nied-repo.bosai.go.jp:00005957", "sets": []}, "author_link": [], "item_10001_biblio_info_7": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2017", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "1", "bibliographicPageEnd": "1_62", "bibliographicPageStart": "1_43", "bibliographicVolumeNumber": "17", "bibliographic_titles": [{"bibliographic_title": "日本地震工学会論文集(Web)", "bibliographic_titleLang": "ja"}, {"bibliographic_title": "Journal of Japan Association for Earthquake Engineering", "bibliographic_titleLang": "en"}]}]}, "item_10001_description_5": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "\u003cp\u003e本論文は, 2011年3月11日に発生した東北地方太平洋沖地震による液状化発生地点の分布の特徴を俯瞰すると共に, 液状化の発生と地震動強さ, 微地形区分, 土地条件の関係について検討している．液状化の発生は, 東北・関東地方の1都12県193市区町村に及んだ．液状化の広がりを250mメッシュ単位でカウントすると合計で8680メッシュとなった．東北地方より関東地方の方が圧倒的に多く約12倍である．液状化発生地点は, 東京湾岸地域や利根川, 阿武隈川, 鳴瀬川などの規模が大きい河川の沿岸地域に集中していた．本震の震央から最も遠い液状化地点は, 神奈川県平塚市で震央距離約440kmである．地震動強さとの関係を調べた結果, 液状化メッシュの約95%が推定震度5強以上, 98%が140cm/s\u003csup\u003e2\u003c/sup\u003e以上, 99%が15cm/s以上の地域であった．震度5強以上の地域における微地形区分ごとの液状化発生率は, 埋立地, 砂丘, 旧河道・旧池沼, 砂州・砂礫州, 干拓地の順に高かった．東北地方と関東地方で液状化の発生率等に大きな差異が生じた理由を探るために, 液状化発生地点において「宅地の液状化可能性判定に係る技術指針」に示された二次判定手法により液状化被害の可能性の判定を行った．その結果, 関東地方の方が東北地方に比べて液状化被害を受けやすい地盤が多いことが分かった．\u003c/p\u003e", "subitem_description_language": "ja", "subitem_description_type": "Other"}, {"subitem_description": "\u003cp\u003eThe Tohoku Earthquake of March 11, 2011 was associated with widespread liquefaction-induced damage in the eastern part of Japan. Our continuing surveys nearly five years from soon after the earthquake revealed that the earthquake induced liquefaction at a significant number of locations in a 650-km long zone extending in the eastern part of Japan. This paper summarized the characteristics of liquefaction during the earthquake. Approximately 8600 grid cells identified to contain liquefied sites; the size of each grid cell was approximately 250 m × 250 m. The intensities of the ground motion of the liquefied grid cells were examined, and approximately 95 % of liquefied grid cells were found to be distributed in the areas where the \u003ci\u003eI\u003c/i\u003e\u003csub\u003eJMA\u003c/sub\u003e exceeded 5 upper during the main shock. Approximately 98% and 99% of liquefied grid cells were distributed in the areas where PGAs exceed 140cm/s\u003csup\u003e2\u003c/sup\u003e or where PGVs exceed 15cm/s, respectively. The liquefaction occurrence ratios (number of liquefaction grid cells divided by total number of grid cells) of different geomorphological unit were calculated where \u003ci\u003eI\u003c/i\u003e\u003csub\u003eJMA\u003c/sub\u003e exceed 5 upper. Those for artificial fills, sand dune, former river channel are large in this order. There was much difference between Tohoku and Kanto regions both in number of liquefaction and liquefaction occurrence ratios. To reveal the cause of the differences between two regions, the factor of safety (\u003ci\u003eF\u003csub\u003eL\u003c/sub\u003e\u003c/i\u003e) against liquefaction was evaluated at 231 sites where liquefaction occurred during the 2011 earthquake. Furthermore, likelihood of liquefaction-induced damage was evaluated based on the combination of liquefaction potential index \u003ci\u003eP\u003csub\u003eL\u003c/sub\u003e\u003c/i\u003e and thickness of surface un-liquefiable layer, \u003ci\u003eH\u003csub\u003e1\u003c/sub\u003e\u003c/i\u003e overlying liquefiable layers, which were determined from the result of the \u003ci\u003eF\u003csub\u003eL\u003c/sub\u003e\u003c/i\u003e analysis. Comparing the result of these analyses of two regions, it was found that the ground of Kanto region is much more likely to liquefy than Tohoku region.\u003c/p\u003e", "subitem_description_language": "en", "subitem_description_type": "Other"}]}, "item_10001_publisher_8": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "公益社団法人 日本地震工学会", "subitem_publisher_language": "ja"}, {"subitem_publisher": "JAPAN ASSOCIATION FOR EARTHQUAKE ENGINEERING", "subitem_publisher_language": "en"}]}, "item_10001_relation_14": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_type_id": {"subitem_relation_type_id_text": "10.5610/jaee.17.1_43"}}]}, "item_10001_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "1884-6246", "subitem_source_identifier_type": "ISSN"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "若松加寿江", "creatorNameLang": "ja"}, {"creatorName": "WAKAMATSU Kazue", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "先名重樹", "creatorNameLang": "ja"}, {"creatorName": "SENNA Shigeki", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "小澤京子", "creatorNameLang": "ja"}, {"creatorName": "OZAWA Kyoko", "creatorNameLang": "en"}]}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "jpn"}]}, "item_title": "2011年東北地方太平洋沖地震による液状化発生の特性", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "2011年東北地方太平洋沖地震による液状化発生の特性", "subitem_title_language": "ja"}, {"subitem_title": "Liquefaction and its Characteristics during the 2011 Tohoku Earthquake", "subitem_title_language": "en"}]}, "item_type_id": "40001", "owner": "1", "path": ["1670839190650"], "permalink_uri": "https://nied-repo.bosai.go.jp/records/5957", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2023-03-30"}, "publish_date": "2023-03-30", "publish_status": "0", "recid": "5957", "relation": {}, "relation_version_is_last": true, "title": ["2011年東北地方太平洋沖地震による液状化発生の特性"], "weko_shared_id": -1}