Abstract
鉄道構造物境界におけるバラスト軌道では，地震時に局所的変位が生じると道床横抵抗力が低下し，軌道の水平安定性が損なわれる．しかし，現場で生じる様々な条件下の道床横抵抗力特性を調べることは難しく，いままでに蓄積された資料は乏しい．そこで本研究では局所的変位をもたらすものとして，角折れに着目し，室内で角折れが発生できる装置を製作して模型試験を実施した．模型試験では道床横抵抗力に折れ角の大きさや回数，開閉状態が及ぼす影響，そして1本引き載荷試験と軌きょう引き載荷試験における違いなどについて調べた．
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