【摘要】 针对土体材料具有不均匀性的特点，动力参数存在一定的不确定性问题，基于正交试验法，以一堰塞坝为例，采用等效线性模型，对堰塞坝坝体竖向地震峰值加速度和竖向永久变形进行了等效线性模型参数的敏感性分析。结果表明：动力模型中参数k₂、n、λ_max对于坝体竖向地震峰值加速度的影响较大，其中k₂的敏感性最大，其次是n;参数k₂、k₁、λ_max对坝体竖向永久变形的影响较大，其中k₂的敏感性最大，其次是k₁。更多还原

【Abstract】 In response to the non-uniformity of soil materials and the uncertainty of dynamic parameters, based on the orthogonal experimental method and taking a dam as an example, an equivalent li-near model was used to analyze the sensitivity of equivalent linear model parameters to the vertical seismic peak acceleration and vertical permanent deformation of the dam body. The results indicate that the parameters k₂, n, and λ_max have significant impacts on the vertical seismic peak acceleration of the dam body, with k₂ being the most sensitive, followed by n. The parameters k₂, k₁, and λ_max have significant impacts on the vertical permanent deformation of the dam body, with k₂ being the most sensitive, fo-llowed by k₁.更多还原