Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE))
巻
70
号
4
ページ
I_991 - I_1003
発行年
2014
ISSN
2185-4653
DOI
10.2208/jscejseee.70.I_991
出版者
土木学会 Japan Society of Civil Engineers
抄録
日本には，城壁，宅地，鉄道，道路等の伝統的な石積擁壁が膨大な数存在し，これまで地震の度に大きな被害を受けている．しかし，1995年の兵庫県南部地震以降，様々な構造物の耐震補強が進む中，地震時における石積擁壁の崩壊のメカニズムが不明であるため，耐震補強などの対策が未着手な状態にある．したがって，石積擁壁の地震時における崩壊のメカニズムを解明し，適正な耐震補強対策を適切に施す基準を作ることが急務とされている．そこで本論文では，擁壁の模型実験及び不連続変形法（DDA）を用いて崩壊メカニズムの解明を行った．
Since collapse mechanisms of masonry retaining wall caused by earthquakes have been less well understood, there are no guidelines of aseismic design for that structure. To assess aseismic performance of masonry retaining wall, we should collect more data via both shaking model tests and numerical simulations. In this study, we conducted a series of shaking test with 1/6 scaled model and DDA (Discontinuous deformation Analysis) simulations to validate the accuracy of our simulation code.
The results of comparisons revealed that the residual patterns of displacement in the DDA simulations are in good agreement with those measured in the shaking table tests. Additionally, the DDA simulation approximately predicts the starting point and the beginning time of collapse inside the retaining wall. Through these discussions, we have confirmed that the DDA is a powerful tool and is complementally applicable to considerations in seismic design of masonry retaining walls.
石積擁壁の耐震性の実験及び解析に関する研究
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TE-PR-MIYAJIMA-M-70_I_991.pdf
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