Experimental study on impact resistant capacity for RC beams damaged due to freezing and thawing action

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  • Kurihashi Yusuke
    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
  • Mizuta Maki
    （国研）土木研究所 寒地土木研究所 耐寒材料チーム
  • Shimata Akinori
    （国研）土木研究所 寒地土木研究所 耐寒材料チーム
  • Katsumi Yuta
    室蘭工業大学大学院 環境創生工学系専攻
  • Kishi Norimitsu
    （独）国立高専機構 釧路工業高等専門学校

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  • 凍害劣化RC梁の耐衝撃性能に関する実験的研究
  • トウガイ レッカ RCリョウ ノ タイショウゲキ セイノウ ニ カンスル ジッケンテキ ケンキュウ

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Abstract

In this study, in order to investigate the influence of freeze-thaw action on impact resistant capacity of RC beams, falling-weight impact loading tests were conducted. Here, relative dynamic elastic modulus (RDM) of the concrete for evaluating frost damage index of concrete was set in the region between 100 % through 70 %. From this experiment, following results were obtained: i) if RDMs near the mid-span area of the beam were smaller than those in the other area, the beam tends to be failed accompanying with the upper concrete crushing; ii) if RDMs in the shear span area were smaller than those in the other area, the beam tends to reach the ultimate state with severe shear cracks opening; and iii) the failure mode of the beam may be largely depended upon the location of the damaged area.

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