{"created":"2021-03-01T06:34:06.050862+00:00","id":28306,"links":{},"metadata":{"_buckets":{"deposit":"d35de975-e606-4dc6-88c3-53eb31647c4a"},"_deposit":{"id":"28306","owners":[],"pid":{"revision_id":0,"type":"depid","value":"28306"},"status":"published"},"_oai":{"id":"oai:niigata-u.repo.nii.ac.jp:00028306","sets":["453:456","485:872:1583:1591"]},"item_7_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"東日本大震災で被災したコンクリート構造物の損傷度評価に関する研究"}]},"item_7_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2013-03","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2","bibliographicPageEnd":"163","bibliographicPageStart":"157","bibliographicVolumeNumber":"65","bibliographic_titles":[{"bibliographic_title":"新潟大学農学部研究報告"},{"bibliographic_title":"新潟大学農学部研究報告","bibliographic_titleLang":"en"}]}]},"item_7_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The Great East-Japan Earthquake hit Tohoku area in Japan on March 11, 2011. A large number of concrete structures were damaged due to the 9.0 magnitude earthquake of the Richter-scale. Prior to reconstruction and retrofit of these structures, damage evaluation of in-situ concrete structures and its materials are now in urgent demand. In this concern, quantitative damage estimation of concrete is proposed to be performed, applying acoustic emission (AE) measurement in the compression test of core samples. The procedure is named DeCAT (Damage Estimation of Concrete by Acoustic Emission Technique), which is based on the rate process analysis and is applied to theoretically estimate the intact modulus of elasticity in concrete. Prior to the compression test, distribution of micro-cracks in a concrete-core sample is inspected by helical X-ray computed tomography (CT), which scans at one-millimeter intervals. Then, damaged samples are tested by the compression test. Concrete-core samples were taken out of a concrete water canal before and after the earthquake. It is demonstrated that the decrease in mechanical properties could be evaluated by comparing an average CT number with the rate of AE generation, which is analyzed by AE rate process. A relation between AE rate and damage parameters is correlated in the DeCAT system, and thus the damage of concrete is quantitatively estimated.","subitem_description_type":"Abstract"},{"subitem_description":"東日本大震災 (2011年3月11日発生) により被災したコンクリート構造物では、補修・補強工の前提として既存施設の損傷度評価が技術的課題となっている。本研究では、震災の影響を受けたコンクリート製開水路を対象にコンクリート・コアを用いて材料損傷の定量的評価を試みた結果を報告する。実験的検討では、微小ひび割れの分布をX線CT法により同定した後に、DeCAT システムとして開発しているAE計測を含む圧縮強度試験により損傷度を評価した。検討の結果、地震損傷によるコンクリート力学特性の低下傾向はCT値とAE発生頻度の関係から評価可能であることが示唆された。AE発生頻度と損傷パラメータとは密接に関連しており、そのことを前提にコンクリートの定量的損傷度評価は可能であることが示唆された。","subitem_description_type":"Abstract"}]},"item_7_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"162703","nameIdentifierScheme":"WEKO"}],"names":[{"name":"鈴木, 哲也"}]},{"nameIdentifiers":[{"nameIdentifier":"162704","nameIdentifierScheme":"WEKO"}],"names":[{"name":"森井, 俊広"}]},{"nameIdentifiers":[{"nameIdentifier":"162705","nameIdentifierScheme":"WEKO"}],"names":[{"name":"河合, 隆行"}]}]},"item_7_publisher_7":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"新潟大学農学部"}]},"item_7_select_19":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_select_item":"publisher"}]},"item_7_source_id_11":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00183393","subitem_source_identifier_type":"NCID"}]},"item_7_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"03858634","subitem_source_identifier_type":"ISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Suzuki, Tetsuya"}],"nameIdentifiers":[{"nameIdentifier":"162700","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Morii, Toshihiro"}],"nameIdentifiers":[{"nameIdentifier":"162701","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kawai, Takayuki"}],"nameIdentifiers":[{"nameIdentifier":"162702","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2019-08-20"}],"displaytype":"detail","filename":"65(2)_157-163.pdf","filesize":[{"value":"1.3 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"65(2)_157-163.pdf","url":"https://niigata-u.repo.nii.ac.jp/record/28306/files/65(2)_157-163.pdf"},"version_id":"96d18629-c8d0-4915-8fdd-86a73a7856cc"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Acoustic Emission (AE)","subitem_subject_scheme":"Other"},{"subitem_subject":"Damage Mechanics","subitem_subject_scheme":"Other"},{"subitem_subject":"Concrete Damage","subitem_subject_scheme":"Other"},{"subitem_subject":"The Great East Japan Earthquake","subitem_subject_scheme":"Other"},{"subitem_subject":"損傷力学","subitem_subject_scheme":"Other"},{"subitem_subject":"コンクリート損傷","subitem_subject_scheme":"Other"},{"subitem_subject":"東日本大震災","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Damage Evaluation of Concrete Structure in Disaster Areas due to the Great East Japan Earthquake","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Damage Evaluation of Concrete Structure in Disaster Areas due to the Great East Japan Earthquake"},{"subitem_title":"Damage Evaluation of Concrete Structure in Disaster Areas due to the Great East Japan Earthquake","subitem_title_language":"en"}]},"item_type_id":"7","owner":"1","path":["456","1591"],"pubdate":{"attribute_name":"公開日","attribute_value":"2013-05-29"},"publish_date":"2013-05-29","publish_status":"0","recid":"28306","relation_version_is_last":true,"title":["Damage Evaluation of Concrete Structure in Disaster Areas due to the Great East Japan Earthquake"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-15T03:58:20.569539+00:00"}