阻尼比是一个重要的结构动力特性参数,它对结构的动力响应有重要影响。目前结构抗震计算通常取阻尼比为常数,这不能真实反映建筑物的阻尼机理,与阻尼比的实测结果也有很大的差距。本文以选取的混凝土框架现场脉动实测阻尼数据、混凝土框架模型振动台试验实测阻尼数据、由地震记录识别的混凝土框架阻尼数据及自行完成的混凝土悬臂试件自由振动实测阻尼数据为依据,对混凝土强度、实验方法、结构方位、结构自振频率和结构变形大小等对混凝土框架阻尼性能的影响进行了分析,在此基础上,统计得到了混凝土框架弹性阻尼比、弹塑性阻尼比与频率或变形相关的计算公式。通过与国内外已有公式的比较,论证了本文建立的阻尼比计算公式的合理性和有效性。 Damping ratio is an important structural dynamic characteristic parameter, which has a significant impact on the dynamic response of the structure. At present, the calculation of anti-seismic structure usually takes the damping ratio as a constant, which can not truly reflect the damping mechanism of the building, and there is a big gap between the measured results and the measured damping ratio. In this paper, the measured damping data of the concrete frame pulsation field, the measured damping data of concrete frame model shaker test, the damping data of the concrete frame identified by the earthquake records and the measured free vibration data of the concrete cantilever specimen, , Experimental method, structural orientation, natural frequency of structure and the size of structural deformation on the damping performance of concrete frame are analyzed. Based on this, the relationship between the elastic damping ratio of concrete frame and the elasto-plastic damping ratio is related to the frequency or deformation The formula. By comparing with the existing formulas both at home and abroad, the rationality and validity of the formulas for calculating the damping ratio established in this paper are demonstrated.