{"created":"2023-06-19T12:45:45.510606+00:00","id":5588,"links":{},"metadata":{"_buckets":{"deposit":"bf9c59a3-628e-42fc-b09c-8be63b098684"},"_deposit":{"created_by":3,"id":"5588","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"5588"},"status":"published"},"_oai":{"id":"oai:tokyo-metro-u.repo.nii.ac.jp:00005588","sets":["521:613:616:763:1321"]},"author_link":["18588","18587"],"item_3_alternative_title_19":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"On Level 2 Earthquake Motions Required for Seismic Design of Civil Structures"}]},"item_3_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1996","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"61","bibliographicPageEnd":"191","bibliographicPageStart":"183","bibliographic_titles":[{"bibliographic_title":"総合都市研究"}]}]},"item_3_creator_3":{"attribute_name":"著者別名","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Omachi, Tatsuo"}],"nameIdentifiers":[{"nameIdentifier":"18588","nameIdentifierScheme":"WEKO"}]}]},"item_3_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"阪神・淡路大震災における社会基盤施設の被害が極めて深刻であったことから、土木学会では「耐震基準等基本問題検討会議」を設置して検討を重ね、2度にわたり「提言」が行われた。この「提言」には、構造物の耐震性能の照査においては、供用期間中における発生確率は低いものの極めて強い地震動(レベル2地震動)を用いるべきことが、新たに求められている。さらに、内陸活断層によるレベル2地震動は、地域ごとに脅威となる活断層を同定し、その震源メカニズムを想定して定めることが基本とされている。一方、「提言」の記述は概念的で具体性を欠き、レベル2地震動の設定は困難との批判的意見や混乱も少なくない。小文は、この混乱の解消に若干なりとも資することを目的に、レベル2地震動に関わる問題点の抽出を行うとともに、高層建築物に対して従来使用されてきたレベル2地震動の考え方や具体的な強さを紹介し、最近までの研究成果をもとにレベル2地震動を設定する手順や課題の整理を行っている。建築物に対するレベル2地震動は、従来、内陸活断層による直下地震の想定とは無関係に設定されていたので、これを想定する場合には、震源近傍効果を新たに考慮する必要があるが、その効果は地震動の周期によって変化する。基準地震動を定める基盤面にしても、短周期構造物に対しては工学的基盤でよいが、長周期構造物に対しては地震基盤とする必要がある。さらに、震源断層をもとに地震動を設定する手法は、理論的手法、半経験的手法、経験的手法に大別できるが、各手法には適用可能な周期範囲がある。これらをもとに、レベル2地震動を設定する手順をフロー図で示した。最後に、緊急の解決・検討を要する課題について私見をまとめた。","subitem_description_type":"Abstract"},{"subitem_description":"Following the 1995 Hyogo-ken Nanbu earthquake，PROPOSAL ONE ARTHQUAKE RESISTANCE FOR CIVIL ENGINEERING STRUCURES was issued by the Japan Society of Civil Engineers. In the proposal, there are descriptions about earthquakes and earthquake motions that need to be considered in earthquake-resistant design，and Level 2 earthquake motions are newly required to be taken into account. Level 2 earthquake motions having extremely large intensity are said to be very low in the probability of occurrence during a life time of a structure，and they are closely related to near-field motions caused by active faults. Due to ambiguity in the proposal，there seems to be some confusion and difficulties in specifying Level 2 motions. To facilitate any effort to specify them，this paper summarizes the similar motions that have been used for high-rise buildings，and state-of-the-arts regarding methods and procedures to evaluate Level 2 motions taking account of active faults. The methods are classified into 3 groups: analytical，semi-empirical and empirical methods. In the evaluation，one has to pay attention to the facts that every method has advantages and disadvantages of itself，and that the basement where Level 2 motions are specified are dependent on vibration periods of a structure concerned. Finally，some comments on issues that need urgent solutions are also stated.","subitem_description_type":"Abstract"}]},"item_3_description_40":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"subitem_description":"postprint","subitem_description_type":"Other"}]},"item_3_publisher_33":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京都立大学都市研究センター"}]},"item_3_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00134354","subitem_source_identifier_type":"NCID"}]},"item_3_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"03863506","subitem_source_identifier_type":"ISSN"}]},"item_3_version_type_16":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"大町, 達夫"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-03-17"}],"displaytype":"detail","filename":"20024-061-014.pdf","filesize":[{"value":"395.2 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"20024-061-014.pdf","url":"https://tokyo-metro-u.repo.nii.ac.jp/record/5588/files/20024-061-014.pdf"},"version_id":"4e49921a-8426-482c-8b67-cfc172efa686"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"1995 Hyogo-ken Nanbu Earthquake","subitem_subject_scheme":"Other"},{"subitem_subject":"Active Faults","subitem_subject_scheme":"Other"},{"subitem_subject":"Near-field Motions","subitem_subject_scheme":"Other"},{"subitem_subject":"Level 2 Earthquake Motions","subitem_subject_scheme":"Other"},{"subitem_subject":"1995年兵庫県南部地震","subitem_subject_scheme":"Other"},{"subitem_subject":"活断層","subitem_subject_scheme":"Other"},{"subitem_subject":"震源近傍の地震動","subitem_subject_scheme":"Other"},{"subitem_subject":"レベル2地震動","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":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"土木構造物の耐震性能の照査に用いるレベル2地震動について","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"土木構造物の耐震性能の照査に用いるレベル2地震動について"}]},"item_type_id":"3","owner":"3","path":["1321"],"pubdate":{"attribute_name":"公開日","attribute_value":"2017-03-31"},"publish_date":"2017-03-31","publish_status":"0","recid":"5588","relation_version_is_last":true,"title":["土木構造物の耐震性能の照査に用いるレベル2地震動について"],"weko_creator_id":"3","weko_shared_id":3},"updated":"2023-06-19T17:10:30.786399+00:00"}