The service life of concrete structures is often threatened by unfavorable dynamic loads. Optimizing the material damping can improve the vibration damping of the structure. In this study, a polyvinyl alcohol fiber-reinforced high-volume fly ash (PVA-HVFA) cementitious composite was developed with high damping characteristics and moderate mechanical properties. The coupling effects of frequency and temperature on the damping were further clarified. Experiments combined with MIP and SEM tests were performed to analyze the pore structure distribution, fiber–matrix morphology, and enhanced damping mechanism. The results showed that the large amount of FA adversely affected strengths of the PVA-HVFA but significantly improved the damping and energy dissipation capacity. Meanwhile, the PVA fibers enhanced both strengths and damping characteristics. Vibration damping and energy dissipation were hypothesized to be affected by the matrix, fibers, and fiber–matrix interface. PVA-HVFA is expected to be applicable to beam–column plastic hinges and other vibrational damping fields.

混凝土结构的使用寿命通常受到不利的动态载荷的威胁。优化材料阻尼可以改善结构的振动阻尼。在这项研究中，开发了一种具有高阻尼特性和适度机械性能的聚乙烯醇纤维增强大体积粉煤灰（PVA-HVFA）水泥基复合材料。频率和温度对阻尼的耦合作用进一步明确。结合MIP和SEM测试进行了实验，以分析孔结构分​​布，纤维-基质形态和增强的阻尼机理。结果表明，大量的FA不利地影响了PVA-HVFA的强度，但显着提高了阻尼和能量消散能力。同时，PVA纤维增强了强度和阻尼特性。假设振动阻尼和能量耗散受到基质，纤维和纤维-基质界面的影响。PVA-HVFA有望应用于梁柱塑料铰链和其他振动阻尼领域。