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

作　　者：卜良桃[1] 汪文渊[1] 何放龙[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2014年第6期52-56,共5页Journal of Hunan University:Natural Sciences

基　　金：国家火炬计划资助项目(2013GH561393)

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.Abstraet：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 ca- pacity 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. Key words： Polyvinyl Alchohol-Engineered Cementitious Composite; strengthening; shear behavior reinforced concrete; overhanging beams

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 

分 类 号：TU375.1[建筑科学—结构工程]