凍害劣化したRCはりの耐衝撃挙動と残存耐力に関する実験的研究

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  • 栗橋 祐介
    室蘭工業大学大学院　くらし環境系領域社会基盤ユニット
  • 水田 真紀
    （国研）理化学研究所　光量子工学研究領域
  • 岸 徳光
    （独）国立高専機構　釧路工業高等専門学校
  • 池田 和隆
    室蘭工業大学大学院　環境創生工学系専攻

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タイトル別名
  • Experimental study on impact resistant behavior and residual capacity of RC beam damaged by freezing and thawing
  • トウガイ レッカ シタ RCハリ ノ タイショウゲキ キョドウ ト ザンソン タイリョク ニ カンスル ジッケンテキ ケンキュウ

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抄録

In this study, in order to investigate the effects of freezing and thawing action on impact resistant behavior and residual load-carrying capacity of RC beam, falling-weight impact loading tests of frost damaged RC beam were conducted taking height of weight-falling as variable. After that, static loading tests were conducted. Here, frost damage levels were evaluated by means of relative dynamic elastic modulus. From this experiment, following results were obtained: i) failure mode of frost damaged RC beam subjected to impact loading could be expected by means of the distribution of relative dynamic elastic modulus; ii) residual load-carrying capacity of frost damaged RC beam after impact loading is almost the same as the case of non-frost damaged one if any typical diagonal cracks cannot be observed.

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