An analytical study about the deformation behavior of a real scale RC bridge deck on steel girders with alkali silica reactions in real environmental conditions

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  • ASR 劣化を受ける実物大鋼主桁上 RC 床版の実環境暴露下における膨張変形挙動に関する解析的研究
  • ASR レッカ オ ウケル ジツブツダイコウ シュゲタ ジョウ RC ショウバン ノ ジツ カンキョウ バクロ カ ニ オケル ボウチョウ ヘンケイ キョドウ ニ カンスル カイセキテキ ケンキュウ

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Abstract

<p>This study investigates the deformation behavior of RC bridge decks suffering from expansions due to alkali silica reactions (ASR). Based on the parametric analyses for reaction coefficient and the effect of the temperature, the long-term free expansions of specimens can be reproduced with the multi-scale calculation scheme. The scheme was applied to the expansion simulations of real scale RC bridge decks on steel girders. The simulation results showed good agreement in the three dimensional deformations with the experimental results. Meanwhile, still the quantitative predictions of expansion strains needs to be improved. It was supposed that the effective gel volume under three dimensional confinement should be investigated to capture the long-term expansion behaviors of RC decks precisely.</p>

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