Study on deformation behavior and structural performance of RC beams subjected to Delayed Ettringite Formation
Study on deformation behavior and structural performance of RC beams subjected to Delayed Ettringite Formation
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延迟钙矾石形成RC梁变形行为及结构性能研究
DOI：
10.11532/structcivil.67a.645
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
石川靖晃，上田尚史
中科院分区：
文献类型：
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作者：
達柊介;伊藤始;南亮多;巳野寛貴;白上新;細野恭成;今井龍一，中村健二，塚田義典，鹿間美咲;石川靖晃，上田尚史
本文主要研究钢筋混凝土梁在延迟钙矾石形成（delay etalingite Formation， DEF）作用下的变形及延迟钙矾石形成对结构性能的影响。从钢筋混凝土梁的试验结果来看，钢筋对混凝土梁的膨胀有抑制作用，这种抑制作用引起了混凝土梁的翘曲变形。DEF改变了RC梁的承载能力和破坏模式。基于机械能守恒假设，采用三维有限元法进行了数值模拟。仿真结果表明，该假设适用于DEF扩展，可以清晰地评估DEF对RC梁的影响及其性能变化机制。
This study focused on deformation of RC beam subjected to Delayed Ettringite Formation (DEF) and structural performance changes due to DEF deterioration. From the experimental results of RC beams, DEF expansion was restrained by rebars and its restraint caused warp deformation. And DEF changed the both load capacity and failure mode of RC beams. Numerical simulations by 3DFEM based on mechanical energy conservation hypothesis were also conducted. The simulation results showed that the hypothesis was applicable to DEF expansion and influences of DEF on the RC beams and mechanisms of performance changing could be clearly evaluated.