WEKO3
インデックスリンク
アイテム
{"_buckets": {"deposit": "aefd3ab1-1386-498d-ac8c-de3c3b9c957f"}, "_deposit": {"created_by": 18, "id": "43533", "owners": [18], "pid": {"revision_id": 0, "type": "depid", "value": "43533"}, "status": "published"}, "_oai": {"id": "oai:kanazawa-u.repo.nii.ac.jp:00043533", "sets": ["2827"]}, "author_link": ["71295", "71296"], "item_9_biblio_info_8": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2007-03", "bibliographicIssueDateType": "Issued"}, "bibliographicPageStart": "9p.", "bibliographicVolumeNumber": "2004-2006", "bibliographic_titles": [{"bibliographic_title": "平成18(2006)年度 科学研究費補助金 基盤研究(B) 研究成果報告書"}, {"bibliographic_title": " 2006 Fiscal Year Final Research Report", "bibliographic_titleLang": "en"}]}]}, "item_9_creator_33": {"attribute_name": "著者別表示", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Torii, Kazuyuki"}], "nameIdentifiers": [{"nameIdentifier": "71296", "nameIdentifierScheme": "WEKO"}, {"nameIdentifier": "50115250", "nameIdentifierScheme": "e-Rad", "nameIdentifierURI": "https://kaken.nii.ac.jp/ja/search/?qm=50115250"}]}]}, "item_9_description_21": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "本研究の成果は以下の4つの項目に分類することができる.\n(1)鉄筋破断による劣化事例調査---石川県内では,平成18年の時点で,せん断補強筋および帯鉄筋に関しては,橋脚の枕梁6基,柱部2基,フーチング4基で,橋台の本体4基,フーチング4基で,鉄筋破断が確認された.主鉄筋に関しては,橋脚の枕梁3基で圧接部のはずれ(破断面は平滑であり,施工不良が原因と推察される)を確認した.橋脚以外では,鉄筋コンクリート堤体2基,トンネル坑口1基で,同様な鉄筋破断を確認した.\n(2)鉄筋破断のメカニズム解明---破断した鉄筋は鉄筋の径がD16からD32の範囲の電炉鉄筋であった.鉄筋の曲げ加工部の破断面は,絞りがなく,脆性的であった.鉄筋破断面は3つの破壊過程(1次亀裂,2次亀裂および3次亀裂の形成とそれらの進展過程)に分類することができ,ASRによる鉄筋破断のメカニズムを提案した.\n(3)ASR劣化橋梁のアセットマネージメント---橋梁のアセットマネージメントには,橋梁の劣化度,補修・補強の要否,費用の算定などを記載したデータベースの作成が不可欠となる.能登有料道路以外の,能登地方の橋梁(昭和61年以前のものを対象)のASR発生状況を詳細に調べた結果,奥能登では橋梁数347の内の166のもの(48%),中能登では橋梁数263の内のもの(23%),加賀では橋梁数417の内の64のもの(15%)に,ASRによる劣化の兆候があることが判明した.\n(4)ASR劣化橋脚の補強およびモニタリングの技術開発---ASR劣化橋脚では,鉄筋破断が発生した枕梁を鋼製支保工で仮受けした後に,打替えることに決めた.ASR劣化橋脚の補強技術は未確立であるので,モニタリングを同時に実施し,その計測結果を今後の補強設計に反映させた.現在も,能登有料道路では打替えを実施した橋脚や補強したフーチング,供用中のトンネルなどで自動計測によるモニタリングを実施している.", "subitem_description_type": "Abstract"}, {"subitem_description": "Research results obtained in this study are summarized as follows ;\n(1)Investigation on fracture of steel bars in ASR-affected structures\nResearch works revealed that the embrittle fracture of steel bars at the bending corner of stirrup or bent-up steel bars, due to excessive expansion of concrete due to ASR, occurred in the pillow beam or footing of piers and the abutment in bridges located in Ishikawa Prefecture, leading to the significant loss of structural integrity of concrete elements.\n(2)Mechanisms of fracture of steel bar due to ASR\nIn the pillow beam or foundation of bridge pier, a lot of stirrup steel bars fractured at the bending corners, without any elongation of steel bar. The fracture surface of steel bar seemed to be very flat and smooth, which indicated the typical embrittlement fracture of steel bar. Whether or not the fracture of steel bars may be associated with the stress corrosion cracking and/or the hydrogen embrittlement fracture was discussed.\n(3)Asset management for ASR-deteriorated bridges\nFor all bridge piers located in Ishikawa prefecture, which is considered to be the most serious ASR case in Japan, the degree of deterioration of bridge pier due to ASR was investigated by the visual inspection of cracking. Corresponding to the classification of ASR deterioration level of each bridge pier, the repair/strengthening method and maintenance procedure were proposed.\n(4)Strengthening and monitoring of ASR-deteriorated bridge piers\nIn the case study of the pillow beam of Kashima Bridge and the foundation of Tokuda No.2 Bridge in Ishikawa Prefecture, the degree of deterioration of bridge pier due to ASR was also investigated by the non-destructive inspection. Based on the classification of ASR deterioration level of each element, the most appropriate strengthening methods were adopted for them. In the maintenance of these bridges, the monitoring using crack sensors was successfully applied in order to ensure the daily safety of these bridges.", "subitem_description_type": "Abstract"}]}, "item_9_description_22": {"attribute_name": "内容記述", "attribute_value_mlt": [{"subitem_description": "研究課題/領域番号:16360218, 研究期間(年度):2004-2006", "subitem_description_type": "Other"}, {"subitem_description": "出典:「鉄筋破断が発生したASR劣化橋脚の調査診断及び補強技術の実用化のための研究開発」研究成果報告書 課題番号16360218\n (KAKEN:科学研究費助成事業データベース(国立情報学研究所))\n 本文データは著者版報告書より作成", "subitem_description_type": "Other"}]}, "item_9_identifier_registration": {"attribute_name": "ID登録", "attribute_value_mlt": [{"subitem_identifier_reg_text": "10.24517/00049875", "subitem_identifier_reg_type": "JaLC"}]}, "item_9_publisher_17": {"attribute_name": "公開者", "attribute_value_mlt": [{"subitem_publisher": "金沢大学自然科学研究科"}]}, "item_9_relation_28": {"attribute_name": "関連URI", "attribute_value_mlt": [{"subitem_relation_name": [{"subitem_relation_name_text": "https://kaken.nii.ac.jp/search/?qm=50115250"}], "subitem_relation_type_id": {"subitem_relation_type_id_text": "https://kaken.nii.ac.jp/search/?qm=50115250", "subitem_relation_type_select": "URI"}}, {"subitem_relation_name": [{"subitem_relation_name_text": "https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16360218/"}], "subitem_relation_type_id": {"subitem_relation_type_id_text": "https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16360218/", "subitem_relation_type_select": "URI"}}, {"subitem_relation_name": [{"subitem_relation_name_text": "https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-16360218/163602182006kenkyu_seika_hokoku_gaiyo/"}], "subitem_relation_type_id": {"subitem_relation_type_id_text": "https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-16360218/163602182006kenkyu_seika_hokoku_gaiyo/", "subitem_relation_type_select": "URI"}}]}, "item_9_version_type_25": {"attribute_name": "著者版フラグ", "attribute_value_mlt": [{"subitem_version_resource": "http://purl.org/coar/version/c_ab4af688f83e57aa", "subitem_version_type": "AM"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "鳥居, 和之"}], "nameIdentifiers": [{"nameIdentifier": "71295", "nameIdentifierScheme": "WEKO"}, {"nameIdentifier": "50115250", "nameIdentifierScheme": "e-Rad", "nameIdentifierURI": "https://kaken.nii.ac.jp/ja/search/?qm=50115250"}]}]}, "item_files": {"attribute_name": "ファイル情報", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2018-01-26"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "TE-PR-TORII-K-kaken 2007-9p.pdf", "filesize": [{"value": "568.7 kB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_11", "mimetype": "application/pdf", "size": 568700.0, "url": {"label": "TE-PR-TORII-K-kaken 2007-9p.pdf", "url": "https://kanazawa-u.repo.nii.ac.jp/record/43533/files/TE-PR-TORII-K-kaken 2007-9p.pdf"}, "version_id": "15b954ca-a4c2-45d6-8649-c49ccfe81ce6"}]}, "item_keyword": {"attribute_name": "キーワード", "attribute_value_mlt": [{"subitem_subject": "アルカリシリカ反応(ASR", "subitem_subject_scheme": "Other"}, {"subitem_subject": "反応性骨材", "subitem_subject_scheme": "Other"}, {"subitem_subject": "鉄筋破断", "subitem_subject_scheme": "Other"}, {"subitem_subject": "橋脚", "subitem_subject_scheme": "Other"}, {"subitem_subject": "補強", "subitem_subject_scheme": "Other"}, {"subitem_subject": "補修", "subitem_subject_scheme": "Other"}, {"subitem_subject": "モニタリング", "subitem_subject_scheme": "Other"}, {"subitem_subject": "非破壊検査", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Alkali Silica reaction (ASR)", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Reactive Aggregate", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Fracture of Steel Reinforcement", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Bridge Pier", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Strengthening", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Repair", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Monitoring", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Non-destructive Inspection", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "jpn"}]}, "item_resource_type": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"resourcetype": "research report", "resourceuri": "http://purl.org/coar/resource_type/c_18ws"}]}, "item_title": "鉄筋破断が発生したASR劣化橋脚の調査診断及び補強技術の実用化のための研究開発", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "鉄筋破断が発生したASR劣化橋脚の調査診断及び補強技術の実用化のための研究開発"}, {"subitem_title": "Practical Research Work on Diagnosis and Strengthening for ASR Deteriorated Bridge Piers with Fracture of Steel Reinforcement", "subitem_title_language": "en"}]}, "item_type_id": "9", "owner": "18", "path": ["2827"], "permalink_uri": "https://doi.org/10.24517/00049875", "pubdate": {"attribute_name": "公開日", "attribute_value": "2018-01-26"}, "publish_date": "2018-01-26", "publish_status": "0", "recid": "43533", "relation": {}, "relation_version_is_last": true, "title": ["鉄筋破断が発生したASR劣化橋脚の調査診断及び補強技術の実用化のための研究開発"], "weko_shared_id": -1}
鉄筋破断が発生したASR劣化橋脚の調査診断及び補強技術の実用化のための研究開発
https://doi.org/10.24517/00049875
https://doi.org/10.24517/00049875790f022a-bbe6-43e9-9c15-4f511ce614a7
名前 / ファイル | ライセンス | アクション |
---|---|---|
TE-PR-TORII-K-kaken 2007-9p.pdf (568.7 kB)
|
Item type | 報告書 / Research Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2018-01-26 | |||||
タイトル | ||||||
タイトル | 鉄筋破断が発生したASR劣化橋脚の調査診断及び補強技術の実用化のための研究開発 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Practical Research Work on Diagnosis and Strengthening for ASR Deteriorated Bridge Piers with Fracture of Steel Reinforcement | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||
資源タイプ | research report | |||||
ID登録 | ||||||
ID登録 | 10.24517/00049875 | |||||
ID登録タイプ | JaLC | |||||
著者 |
鳥居, 和之
× 鳥居, 和之 |
|||||
著者別表示 |
Torii, Kazuyuki
× Torii, Kazuyuki |
|||||
書誌情報 |
平成18(2006)年度 科学研究費補助金 基盤研究(B) 研究成果報告書 en : 2006 Fiscal Year Final Research Report 巻 2004-2006, p. 9p., 発行日 2007-03 |
|||||
出版者 | ||||||
出版者 | 金沢大学自然科学研究科 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 本研究の成果は以下の4つの項目に分類することができる. (1)鉄筋破断による劣化事例調査---石川県内では,平成18年の時点で,せん断補強筋および帯鉄筋に関しては,橋脚の枕梁6基,柱部2基,フーチング4基で,橋台の本体4基,フーチング4基で,鉄筋破断が確認された.主鉄筋に関しては,橋脚の枕梁3基で圧接部のはずれ(破断面は平滑であり,施工不良が原因と推察される)を確認した.橋脚以外では,鉄筋コンクリート堤体2基,トンネル坑口1基で,同様な鉄筋破断を確認した. (2)鉄筋破断のメカニズム解明---破断した鉄筋は鉄筋の径がD16からD32の範囲の電炉鉄筋であった.鉄筋の曲げ加工部の破断面は,絞りがなく,脆性的であった.鉄筋破断面は3つの破壊過程(1次亀裂,2次亀裂および3次亀裂の形成とそれらの進展過程)に分類することができ,ASRによる鉄筋破断のメカニズムを提案した. (3)ASR劣化橋梁のアセットマネージメント---橋梁のアセットマネージメントには,橋梁の劣化度,補修・補強の要否,費用の算定などを記載したデータベースの作成が不可欠となる.能登有料道路以外の,能登地方の橋梁(昭和61年以前のものを対象)のASR発生状況を詳細に調べた結果,奥能登では橋梁数347の内の166のもの(48%),中能登では橋梁数263の内のもの(23%),加賀では橋梁数417の内の64のもの(15%)に,ASRによる劣化の兆候があることが判明した. (4)ASR劣化橋脚の補強およびモニタリングの技術開発---ASR劣化橋脚では,鉄筋破断が発生した枕梁を鋼製支保工で仮受けした後に,打替えることに決めた.ASR劣化橋脚の補強技術は未確立であるので,モニタリングを同時に実施し,その計測結果を今後の補強設計に反映させた.現在も,能登有料道路では打替えを実施した橋脚や補強したフーチング,供用中のトンネルなどで自動計測によるモニタリングを実施している. |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Research results obtained in this study are summarized as follows ; (1)Investigation on fracture of steel bars in ASR-affected structures Research works revealed that the embrittle fracture of steel bars at the bending corner of stirrup or bent-up steel bars, due to excessive expansion of concrete due to ASR, occurred in the pillow beam or footing of piers and the abutment in bridges located in Ishikawa Prefecture, leading to the significant loss of structural integrity of concrete elements. (2)Mechanisms of fracture of steel bar due to ASR In the pillow beam or foundation of bridge pier, a lot of stirrup steel bars fractured at the bending corners, without any elongation of steel bar. The fracture surface of steel bar seemed to be very flat and smooth, which indicated the typical embrittlement fracture of steel bar. Whether or not the fracture of steel bars may be associated with the stress corrosion cracking and/or the hydrogen embrittlement fracture was discussed. (3)Asset management for ASR-deteriorated bridges For all bridge piers located in Ishikawa prefecture, which is considered to be the most serious ASR case in Japan, the degree of deterioration of bridge pier due to ASR was investigated by the visual inspection of cracking. Corresponding to the classification of ASR deterioration level of each bridge pier, the repair/strengthening method and maintenance procedure were proposed. (4)Strengthening and monitoring of ASR-deteriorated bridge piers In the case study of the pillow beam of Kashima Bridge and the foundation of Tokuda No.2 Bridge in Ishikawa Prefecture, the degree of deterioration of bridge pier due to ASR was also investigated by the non-destructive inspection. Based on the classification of ASR deterioration level of each element, the most appropriate strengthening methods were adopted for them. In the maintenance of these bridges, the monitoring using crack sensors was successfully applied in order to ensure the daily safety of these bridges. |
|||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 研究課題/領域番号:16360218, 研究期間(年度):2004-2006 | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 出典:「鉄筋破断が発生したASR劣化橋脚の調査診断及び補強技術の実用化のための研究開発」研究成果報告書 課題番号16360218 (KAKEN:科学研究費助成事業データベース(国立情報学研究所)) 本文データは著者版報告書より作成 |
|||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://kaken.nii.ac.jp/search/?qm=50115250 | |||||
関連名称 | https://kaken.nii.ac.jp/search/?qm=50115250 | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16360218/ | |||||
関連名称 | https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16360218/ | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-16360218/163602182006kenkyu_seika_hokoku_gaiyo/ | |||||
関連名称 | https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-16360218/163602182006kenkyu_seika_hokoku_gaiyo/ |