{"created":"2023-05-15T16:30:11.375262+00:00","id":1227,"links":{},"metadata":{"_buckets":{"deposit":"d99069b2-f0f0-4778-8b2f-aea4ff0b4098"},"_deposit":{"created_by":2,"id":"1227","owners":[2],"pid":{"revision_id":0,"type":"depid","value":"1227"},"status":"published"},"_oai":{"id":"oai:nagasaki-u.repo.nii.ac.jp:00001227","sets":["14:21"]},"author_link":["5744","5746","5745"],"item_2_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2018-06-05","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"33","bibliographicPageStart":"21","bibliographicVolumeNumber":"240","bibliographic_titles":[{"bibliographic_title":"Engineering Geology"}]}]},"item_2_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"A large number of laboratory experiments have shown that the rocks in post-peak state present strain-softening behaviour under low confining pressure, and gradually evolved into elastic-perfectly plastic with the increasing of confining pressure. Neither the elastic-perfectly plastic model nor the strain-softening model can accurately describe the behaviour of rock mass surrounding the deep buried excavations. In this paper, a modified strain-softening model was proposed to describe the non-linear evolution of residual strength under the influence of confining pressure. The new model can realize the gradually transition from strain-softening behaviour to elastic-perfectly plastic behaviour with the increasing of confining pressure. The equivalent residual strength was defined to quantify the strength of rocks in post-peak stage. The parameters involved in the model were estimated via non-linear regression analysis upon a series of stress-strain curves. Based on the plane strain axial symmetry assumption and the incremental theory of plasticity, equilibrium equations and compatibility equations of rock mass around a circular tunnel were deduced. The equations were implemented in the Visual Basic development environment, and a semi-analytical solution was obtained. The influence of post-failure behaviour of rock mass was demonstrated through an illustrative case. The distributions of stress, displacement and transitional strength around the tunnel were presented. The differences between the elastic-perfectly plastic model, the strain-softening model and the new model were estimated quantitatively. In addition, the validity of semi-analytical solution was verified by numerical simulations. Parameters analysis showed that the tunnel convergence was influenced by the post-peak behaviour of rock mass dramatically.","subitem_description_type":"Abstract"}]},"item_2_description_63":{"attribute_name":"引用","attribute_value_mlt":[{"subitem_description":"Engineering Geology, 240, pp.21-33; 2018","subitem_description_type":"Other"}]},"item_2_publisher_33":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Elsevier B.V."}]},"item_2_relation_12":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isVersionOf","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1016/j.enggeo.2018.03.031","subitem_relation_type_select":"DOI"}}]},"item_2_rights_13":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"c 2018 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/"}]},"item_2_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"00137952","subitem_source_identifier_type":"ISSN"}]},"item_2_version_type_16":{"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":"Wu, Xuezhen"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Jiang, Yujing"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Guan, Zhenchang"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-12-18"}],"displaytype":"detail","filename":"EngGeo240_21.pdf","filesize":[{"value":"569.0 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"EngGeo240_21.pdf","url":"https://nagasaki-u.repo.nii.ac.jp/record/1227/files/EngGeo240_21.pdf"},"version_id":"82dac86e-bb7d-4ec6-9467-e2846d75a8be"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Confining pressure","subitem_subject_scheme":"Other"},{"subitem_subject":"Post-peak behaviour","subitem_subject_scheme":"Other"},{"subitem_subject":"Residual strength","subitem_subject_scheme":"Other"},{"subitem_subject":"Semi-analytical solution","subitem_subject_scheme":"Other"},{"subitem_subject":"Strain-softening model","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":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"A modified strain-softening model with multi-post-peak behaviours and its application in circular tunnel","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"A modified strain-softening model with multi-post-peak behaviours and its application in circular tunnel"}]},"item_type_id":"2","owner":"2","path":["21"],"pubdate":{"attribute_name":"公開日","attribute_value":"2020-06-05"},"publish_date":"2020-06-05","publish_status":"0","recid":"1227","relation_version_is_last":true,"title":["A modified strain-softening model with multi-post-peak behaviours and its application in circular tunnel"],"weko_creator_id":"2","weko_shared_id":-1},"updated":"2023-05-16T04:05:30.571355+00:00"}