Shear strength evaluation of reinforced concrete beams subjected to freeze-thaw action
Shear strength evaluation of reinforced concrete beams subjected to freeze-thaw action
复制标题
冻融作用下钢筋混凝土梁抗剪强度评价
DOI：
10.11532/structcivil.66a.703
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
成田 達哉
中科院分区：
文献类型：
--
作者：
金澤 健;成田 達哉
本文对钢筋混凝土梁在冻害作用下的抗剪承载力进行了全面的研究。利用上限理论对41根冻融受剪破坏的钢筋混凝土梁的试验数据进行了迭代分析，结果表明，试验值与预测值吻合较好。在此分析的基础上进行了计算评估，以考察损伤区域的影响：钢筋混凝土梁的受压侧或拉侧，其高度，以及剪力配筋率对抗剪强度的影响。结果表明，损伤分布对倾角和混凝土对抗剪强度的贡献有很大影响。
This paper presents a comprehensive examination of shear capacity of RC beams subjected to frost damage. Available test data of 41 RC beams failing in shear after freeze-thaw exposure were evaluated by iterative analysis using upper bound theorem, and the evaluation showed that close agreement was observed between the experimental and predicted shear strength. The computational assessment based on the developed analysis was then conducted to examine the effects of damaged zones: compression or tension side of RC beams, its depth, and shear reinforcement ratio on the shear strength. Results demonstrated that the damage distribution considerably influenced the angles of inclination and concrete contribution to shear strength.