When bridge abutments are constructed on soft ground, EPS embankments are installed behind the abutments as a countermeasure against soft ground. In this study, a full-scale bridge with EPS embankment applied to the back of a rigid-frame abutment was modeled and its seismic behavior was verified analytically. The bridge was modeled in accordance with the specifications for highway bridges, using the same procedure as in actual design. As a result, it was confirmed that the application of EPS embankment to the back of the rigid-frame abutment causes more significant seismic earth pressure than the normal backfill soil at the location of the reinforced concrete slab, similar to the results of previous studies of inverted-T abutments. It was confirmed that the seismic earth pressure at the location where the concrete slab was installed could be reduced by replacing a part of the concrete slab with EPS blocks.
"},{"@language":"ja","@value":"軟弱地盤上に橋台を建設する際，軟弱地盤対策として橋台背面にEPS盛土を設置する場合がある．本研究では，ラーメン式橋台背面にEPS盛土を適用した実規模橋梁のモデル化を行い，その地震時挙動を解析的に検証した．橋梁は道路橋示方書に基づき，実際の設計と同様の手順でモデル化した．検討の結果，ラーメン式橋台背面にEPS盛土を適用した場合には，既往の逆T式橋台の研究結果と同様に，鉄筋コンクリート製の床版敷設位置において，橋台には通常の裏込め土の土圧よりも卓越した衝突力が作用することが確認できた．さらに，コンクリート床版の一部をEPSブロックに置き換える対策工により，コンクリート床版敷設位置の地震時衝突力を低減できることを確認した．
"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410023328278832640","@type":"Researcher","foaf:name":[{"@language":"ja","@value":"松田 泰治"},{"@language":"en","@value":"MAZDA Taiji"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"九州大学"}]},{"@id":"https://cir.nii.ac.jp/crid/1410023328278832642","@type":"Researcher","foaf:name":[{"@language":"ja","@value":"中野 壮士郎"},{"@language":"en","@value":"NAKANO Soshiro"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"（株）春日建設エンジニア"}]},{"@id":"https://cir.nii.ac.jp/crid/1410023328278832641","@type":"Researcher","foaf:name":[{"@language":"ja","@value":"梶田 幸秀"},{"@language":"en","@value":"KAJITA Yukihide"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"九州大学大学院 工学研究院社会基盤部門"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"24366021"}],"prism:publicationName":[{"@language":"ja","@value":"土木学会論文集"},{"@language":"en","@value":"Japanese Journal of JSCE"},{"@language":"ja","@value":"土木学会論文集"},{"@language":"en","@value":"Japanese Journal of JSCE"}],"dc:publisher":[{"@language":"en","@value":"Japan Society of Civil Engineers"},{"@language":"ja","@value":"公益社団法人 土木学会"}],"prism:publicationDate":"2025","prism:volume":"81","prism:number":"13","prism:startingPage":"n/a"},"reviewed":"false","url":[{"@id":"https://www.jstage.jst.go.jp/article/jscejj/81/13/81_24-13477/_pdf"}],"availableAt":"2025","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=EPS%20(Expanded%20Poly-Styrene)","dc:title":"EPS (Expanded Poly-Styrene)"},{"@id":"https://cir.nii.ac.jp/all?q=ramen-type%20abutment","dc:title":"ramen-type abutment"},{"@id":"https://cir.nii.ac.jp/all?q=lightweight%20embankment","dc:title":"lightweight embankment"},{"@id":"https://cir.nii.ac.jp/all?q=earth%20pressure","dc:title":"earth pressure"},{"@id":"https://cir.nii.ac.jp/all?q=dynamic%20analysis","dc:title":"dynamic analysis"}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:2014327469"},{"@type":"CROSSREF","@value":"10.2208/jscejj.24-13477"}]}