Item Description
The purpose of this investigation is to clarify analytically the main mechanism of
ruptures of elastomeric bearings used on the East viaduct due to the 2011 off the Pacific coast of Tohoku Earthquake. We made reproduction analysis using the acceleration waveform that was observed in Sendai Higashi interchange near this viaduct. The response of the non-linear dynamic analysis with the general design model did not match the real situation of the damages.
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Japanese Title
八千代エンジニアリング｜東北地方太平洋沖地震により被災した東部高架橋のゴム支承に関する解析的検討 [PDF]
Japanese Description
平成 23 年 3 月 11 日に発生した東北地方太平洋沖地震により，東日本高速道路株式会社が管理する高規格幹線道路では，東北および関東地方の広域で被害が生じた．損傷した橋梁数は，小さな損傷を含めて約250 橋に及ぶ．本地震では，平成16 年の新潟県中越地震や平成19 年の新潟県中越沖地震の損傷と同様に主に鋼製支承本体，同取付部，および伸縮装置に多くの損傷がみられた．また，過去に事例の無い新たな損傷形態として，H8 道路橋方書 1)（以下，H8 道示と称す）を基準に設計された 2橋（仙台東部道路・東部高架橋，仙台北部道路・利府高架橋）の一部において，タイプB の地震時水平力分散型ゴム支承（以下，ゴム支承と称す）の破断が生じた．本稿は，東部高架橋のゴム支承の破断メカニズムについて，被災後の損傷状況を踏まえてモデル化し，非線形動的解析等により検討したものである．
English Title
An analytical investigation into causes of ruptures of the elastomeric bearings used on the East viaduct due to the 2011 off the Pacific coast of Tohoku Earthquake [PDF]
English Description
The purpose of this investigation is to clarify analytically the main mechanism of ruptures of elastomeric bearings used on the East viaduct due to the 2011 off the Pacific coast of Tohoku Earthquake. We made reproduction analysis using the acceleration waveform that was observed in Sendai Higashi interchange near this viaduct. The response of the non-linear dynamic analysis with the general design model did not match the real situation of the damages.
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http://wayback.archive-it.org/2438/20110301000000/https://www.yachiyo-eng.co.jp/case/papers/pdf/2013_10_nagoya.pdf
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https://www.yachiyo-eng.co.jp/case/papers/pdf/2013_10_nagoya.pdf