卜良桃,汪文渊,何放龙.RC伸臂梁采用PVA-ECC加固抗剪试验研究[J].湖南大学学报:自然科学版,2014,41(6):52~56
RC伸臂梁采用PVA-ECC加固抗剪试验研究
Shear Behavior of RC Overhanging Beams Strengthened with PVA-ECC
  
DOI:
中文关键词:  聚乙烯醇纤维水泥砂浆  加固  抗剪  钢筋混凝土;伸臂梁
英文关键词:Polyvinyl Alchohol-Engineered Cementitious Composite  strengthening  shear behavior  reinforced concrete  overhanging beams
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作者单位
卜良桃,汪文渊,何放龙 (湖南大学 土木工程学院,湖南 长沙410082) 
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中文摘要:
      基于2根对比梁和2根聚乙烯醇纤维水泥砂浆(PVA-ECC)钢筋网加固的钢筋混凝土伸臂梁的抗剪试验,分析了不同剪跨比下的对比梁及加固试验梁的斜裂缝开展、破坏形态、挠度、应变的变化规律.试验表明,该加固方法对梁的剪切刚度、抗裂性能及抗剪承载力均有一定的提高.依据实验结果,提出了聚乙烯醇纤维水泥砂浆钢筋网加固RC伸臂梁的抗剪承载力计算公式, 计算结果与试验结果吻合得较好,可为实际加固工程设计提供理论参考.
英文摘要:
      Based on the experimental research on the shear test behavior of two general beams and two overhanging RC beams strengthened with PVA-ECC, the regulations for the change of the mode of diagonal cracks, failure, deflection and strain have been analyzed in the experiment. The results show that this reinforced method can increase the crack-resisiting capacity and impove the shear stiffness and the load-bearing capacity of the beam. According to the test results, the computational formula of the shear load capacity of overhanging RC beams strengthened with PVA-ECC was established. The calculated results fit well with the experimental results, thus providing a theoretical reference for practical engineering designs.
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