{"_buckets": {"deposit": "d7dbb044-7e5e-42eb-ae2f-d60bd2dbb690"}, "_deposit": {"id": "5966", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "5966"}, "status": "published"}, "_oai": {"id": "oai:nied-repo.bosai.go.jp:00005966", "sets": []}, "author_link": [], "item_10001_biblio_info_7": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2021-02", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "1", "bibliographicPageEnd": "1_158", "bibliographicPageStart": "1_135", "bibliographicVolumeNumber": "21", "bibliographic_titles": [{"bibliographic_title": "日本地震工学会論文集", "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\u003e2016年熊本地震では阿蘇カルデラにおいて特殊な帯状の陥没が多く発生し，住宅や道路，上下水道，農地，護岸が甚大な被害を受けた．その発生のメカニズムを研究するため，種々の現地調査，土質試験，解析を行った．合成開口レーダの測定結果によると陥没が発生した地区では局所的に2～3 mの水平変位が発生していた．この地区では9,000年前頃に湖が形成されていた．ボーリングや微動アレイ観測結果によると，湖底はお椀状で，そこに珪藻や軽石を含んだ特殊な粘性土層が堆積していた．この湖成層の土質試験を行ったところ，繰返しせん断力を受けると緩い砂の液状化と同様にせん断剛性が激減することが分かった．そこで地震応答解析および残留変形解析を行ったところ，地震動による湖成層のせん断剛性の急減により湖成層が湖底に沿って回り込むように変形し，それに引きずられて湖の縁付近の表層土に水平方向の引張り力が生じ，陥没が発生したと考えられた．\u003c/p\u003e", "subitem_description_language": "ja", "subitem_description_type": "Other"}, {"subitem_description": "\u003cp\u003eMany grabens, which are special and strange, belt-like subsidences, formed in the caldera of the Aso Volcano during the 2016 Kumamoto Earthquake. These grabens caused severe damage to houses, roads, water and sewage pipes, rice fields, and river dikes. The authors conducted various site investigations, soil tests and analyses to determine the mechanism of the grabens. The measurement of the displacement by SAR from satellites showed horizontal displacements of about 2 to 3 m. In this area, an old lake was formed approximately 9,000 years ago. Borings and microtremor measurements demonstrated a special cohesive soil layer with diatom and pumice sediment in the lake, and the bottom of the lake is U-shaped. Soil tests on the lake sediment soil clarified that the shear modulus decreases drastically under cyclic loadings, similar to the liquefaction of loose sand. The authors conducted a seismic response analysis and a residual deformation analysis and concluded that the lake sediment soil deformed to wrap around the U-shaped bottom of the lake due to the sharp decrease in shear stiffness during the earthquake, resulting in horizontal tensile stress on the surface soil and the grabens near the edge of the lake.\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.21.1_135"}}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "安田 進", "creatorNameLang": "ja"}, {"creatorName": "YASUDA Susumu", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "大保 直人", "creatorNameLang": "ja"}, {"creatorName": "OHBO Naoto", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "島田 政信", "creatorNameLang": "ja"}, {"creatorName": "SHIMADA Masanobu", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "千葉 達朗", "creatorNameLang": "ja"}, {"creatorName": "CHIBA Tatsuro", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "永瀬 英生", "creatorNameLang": "ja"}, {"creatorName": "NAGASE Hideo", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "村上 哲", "creatorNameLang": "ja"}, {"creatorName": "MURAKAMI Satoshi", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "先名 重樹", "creatorNameLang": "ja"}, {"creatorName": "SENNA Shigeki", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "北田 奈緒子", "creatorNameLang": "ja"}, {"creatorName": "KITADA Naoko", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "石川 敬祐", "creatorNameLang": "ja"}, {"creatorName": "ISHIKAWA Keisuke", "creatorNameLang": "en"}]}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "jpn"}]}, "item_title": "2016年熊本地震により阿蘇カルデラで発生した帯状陥没のメカニズム", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "2016年熊本地震により阿蘇カルデラで発生した帯状陥没のメカニズム", "subitem_title_language": "ja"}, {"subitem_title": "Mechanism of the Grabens that formed in the Aso Caldera during the 2016 Kumamoto Earthquake", "subitem_title_language": "en"}]}, "item_type_id": "40001", "owner": "1", "path": ["1670839190650"], "permalink_uri": "https://nied-repo.bosai.go.jp/records/5966", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2023-03-30"}, "publish_date": "2023-03-30", "publish_status": "0", "recid": "5966", "relation": {}, "relation_version_is_last": true, "title": ["2016年熊本地震により阿蘇カルデラで発生した帯状陥没のメカニズム"], "weko_shared_id": -1}