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EXPERIMENTAL STUDY ON LOW STRENGTH CAVITY WALLS STRENGTHENED WITH HIGH STRENGTH STEEL WIRE AND POLYMER MORTAR
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摘要: 进行3片采用高强钢绞线-聚合物砂浆加固的低强度空斗墙和1片未加固空斗墙的低周反复荷载试验,研究加固前后空斗墙的破坏形态、承载能力、变形能力、刚度退化、滞回特性以及耗能能力等抗震性能。试验结果表明,高强钢绞线-聚合物砂浆加固能有效提高低强度空斗墙的承载力和变形能力,提高初始刚度并延缓刚度退化过程。采用已有的经验公式对加固前、后空斗墙的抗剪承载力的计算结果表明,计算值与试验结果基本吻合。Abstract: One unstrengthened low strength cavity wall and three cavity walls strengthened with high strength steel wire and polymer mortar were tested under low frequency cyclic horizontal load.The failure mode,ultimate strength,hysteresis loops,stiffness degradation,and energy dissipation of these walls were analyzed.The test results showed that the bearing capacity and deformability of the strengthened cavity walls increased significantly;the initial stiffness was improved and the stiffness degradation was retarded.The shear bearing capacities of cavity walls before and after strengthening were calculated using empiric formulas and the calculation results were close to experimental results.
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