{"_buckets": {"deposit": "482ed7c1-9f91-409e-9bb6-e5a24a49c680"}, "_deposit": {"created_by": 10, "id": "5586", "owners": [10], "pid": {"revision_id": 0, "type": "depid", "value": "5586"}, "status": "published"}, "_oai": {"id": "oai:nied-repo.bosai.go.jp:00005586", "sets": []}, "author_link": [], "item_10001_biblio_info_7": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2006", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "3", "bibliographicPageEnd": "721", "bibliographicPageStart": "707", "bibliographicVolumeNumber": "62", "bibliographic_titles": [{"bibliographic_title": "土木学会論文集 C", "bibliographic_titleLang": "ja"}, {"bibliographic_title": "土木学会論文集 C", "bibliographic_titleLang": "en"}]}]}, "item_10001_description_5": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "落石の挙動は，斜面の傾斜や構成材質，落石の形状や規模など，さまざまな条件によって複雑に変化するため予測の難しい現象である．そのメカニズム解明や防災計画を目的として，数多くの落石シミュレーション手法が開発されているが，入力定数の特性や地盤との対応関係など，未解明な点が多く残されている．本研究では，落石シミュレーションに用いるこのような係数のうち，衝突時の法線方向速度比(\u003ci\u003eR\u003csub\u003en\u003c/sub\u003e\u003c/i\u003e)と線速度エネルギー比(\u003ci\u003eE\u003csub\u003ev\u003c/sub\u003e\u003c/i\u003e)の変化に着目し，実際の挙動観察を通じて，それらが入射角度に大きく依存する性質があることを明らかにした．そして，この特性を不連続変形法(DDA)に導入することで，軌跡や速度が大きく改善されることを，再現解析によって確認した．", "subitem_description_language": "ja", "subitem_description_type": "Other"}, {"subitem_description": "Rockfall behaviour should vary with changes in various conditions, such as inclination of slope, slope materials, the shape and size of falling rocks. Thus it is not easy to predict its behaviour. On the other hand, a lot of numerical methods of rockfall are developed to conduct a plan of disaster prevention. However some probrems of characteristics of input parameters are not solved. Forthermore, under the present situation, rockfall simulations are restricted to perform back analysis method. In this study, the properties of normal velocity ratio(\u003ci\u003eR\u003csub\u003en\u003c/sub\u003e\u003c/i\u003e) and velocity energy ratio(\u003ci\u003eE\u003csub\u003ev\u003c/sub\u003e\u003c/i\u003e) at impact, which are dependence on the incident angle through observations, are discussed. To use improved DDA considering these properties, we verified that the motion of rockfall by DDA simulation shows good agreements with the observations through the trajectory and the velocity of falling rocks.", "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 土木学会", "subitem_publisher_language": "ja"}, {"subitem_publisher": "Japan Society of Civil Engineers", "subitem_publisher_language": "en"}]}, "item_10001_relation_14": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_type_id": {"subitem_relation_type_id_text": "10.2208/jscejc.62.707"}}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "島内哲哉", "creatorNameLang": "ja"}, {"creatorName": "島内哲哉", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "大西有三", "creatorNameLang": "ja"}, {"creatorName": "大西有三", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "西山哲", "creatorNameLang": "ja"}, {"creatorName": "西山哲", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "酒井直樹", "creatorNameLang": "ja"}, {"creatorName": "酒井直樹", "creatorNameLang": "en"}]}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "jpn"}]}, "item_title": "衝突時の特性を考慮した不連続変形法の落石シミュレーションへの適用性に関する研究", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "衝突時の特性を考慮した不連続変形法の落石シミュレーションへの適用性に関する研究", "subitem_title_language": "ja"}, {"subitem_title": "STUDY ON VERIFICATION OF ROCKFALL SIMULATION USING IMPROVED DDA CONSIDERING THE CHARACTERISTICS OF VELOCITY ENERGY RATIO AT IMPACT", "subitem_title_language": "en"}]}, "item_type_id": "40001", "owner": "10", "path": ["1670839190650"], "permalink_uri": "https://nied-repo.bosai.go.jp/records/5586", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2024-05-06"}, "publish_date": "2024-05-06", "publish_status": "0", "recid": "5586", "relation": {}, "relation_version_is_last": true, "title": ["衝突時の特性を考慮した不連続変形法の落石シミュレーションへの適用性に関する研究"], "weko_shared_id": -1}