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Title: メナーゼヒンジを有するロッカー橋脚のUBRC補強による耐震性能向上に関する検討
Other Titles: Improvement of Seismic Performance by Unbonded Bar Reinforced Concrete Reinforcement for Rocker Piers with Mesnager Hinges
Authors: 植村, 佳大  kyouindb  KAKEN_id
高橋, 良和  kyouindb  KAKEN_id  orcid (unconfirmed)
長崎, 裕貴  KAKEN_name
Author's alias: UEMURA, Keita
TAKAHASHI, Yoshikazu
Keywords: rocker pier
mesnager hinge
seismic strengthening
cyclic loading test
dynamic analysis
Issue Date: 2019
Publisher: Japan Society of Civil Engineers
Journal title: 土木学会論文集A1
Volume: 75
Issue: 4
Start page: I_391
End page: I_407
Abstract: 柱基部にメナーゼヒンジを有するロッカー橋脚は,設計上の想定を超える変位が生じると自立性を失うことが知られており,水平・鉛直方向に対する安定性の確保が求められている.そこで本研究では,ロッカー橋脚への耐震補強方策として,柱断面外に配置したPC鋼棒を治具を介して取り付けるUBRC補強を提案し,正負交番載荷実験によりその耐震性能向上効果を検討した.その結果,PC鋼棒の引張力が実験当初の想定ほどは発揮されなかったものの,UBRC補強により抵抗モーメントが増加し,ロッカー橋脚の水平方向に対する安定性が確保された.また,正負交番載荷実験の再現解析では,PC鋼棒固定用治具の緩みをモデル化することで実験結果を再現できた.また,動的解析の検討例を示し,UBRC補強によるロッカー橋脚の倒壊挙動防止効果を確認した.The rocker piers with the mesnager hinges are known to become unstable when large displacement occurs, and it is necessary to secure the stability in the horizontal and vertical directions. Therefore, in this research, a unbonded bar reinforced concrete reinforcement (UBRC reinforcement) for rocker piers was proposed, and the effect of improving seismic performance was examined by cyclic loading test. As a result, it was found that resistance moment was increased by UBRC reinforcement and stability of the rocker piers in the horizontal direction was secured. Moreover, the experimental results of the test specimens could be reproduced in the static analysis of the cyclic loading test, and UBRC reinforcement was found to improve dynamic response characteristics of rocker piers in dynamic analysis.
Rights: © 2019 公益社団法人 土木学会
DOI(Published Version): 10.2208/jscejseee.75.I_391
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