当前的抗震设计方法并不能有效地控制非结构构件的地震损坏，由此造成巨大 的经济损失． 文中考虑地震易损性曲线生成和地震损失率评估过程中的不确定性因素，以 地震易损性参数和地震损失率参数作为地震损失评估过程中的基本随机变量，分析了各 基本随机变量取不同变异系数时，非结构构件地震损失率变异性的变化． 进而通过经验拟 合的方式，建立了非结构构件地震损失率的概率评估模型． 基于建立的概率评估模型，一 旦确定非结构构件的地震响应参数值，即可计算位移敏感型和加速度敏感型非结构构件 地震损失率的均值和标准差． 研究结果表明:非结构构件的地震损失率曲线随层间位移角 和楼面加速度的增加，离散性逐渐增大，但最终趋于稳定． 严重破坏( LS) 和倒塌( CP) 性 能点的地震易损性参数和地震损失率参数的变异性对非结构构件地震损失率曲线的变异 性影响显著． 研究结果可为非结构构件的地震损失评估提供概率依据． 

Current seismic design method can hardly be effective to avoid the seismic damage of nonstructural components，which results in a large number of economic losses． In this paper，uncertainties involved in the generation of seismic fragility curves and evaluation of seismic loss ratio were taken into account，where the capacity median， capacity dispersion and damage factors are regarded as basic random variables with different coefficient of variation ( COV) to investigate the influence on the COV of seismic loss ratio of nonstructural components． Furthermore，a probabilistic approach is developed to estimate the seismic loss ratio of nonstructural components based on empirical regression analysis approach． As a result，once the magnitude of seismic response parameters of nonstructural components is determined，the mean value and standard deviation ( STD) of seismic loss ratio of drift-sensitive and acceleration-sensitive nonstructural components can be predicted directly． The conclusion indicates that the dispersion of seismic loss ratio of nonstructural components increases with the rise of inter-storey drift ratio and floor acceleration，but becomes stable in the end． The variation of seismic fragility parameters at life-safety ( LS) ，collapse prevention ( CP) performance level and seismic damage factors affect the variation of seismic loss ratio of nonstructural components significantly． Such observation benefits the estimation of seismic loss ratio of nonstructural components in probability．