【摘要】 针对传统加速度指标在评价大震远场与小震近场边坡地震损伤时存在的破坏程度与峰值离散性显著问题，该文基于质点振动速度理论构建了黄土边坡损伤新型评价体系。通过振动台模型试验与数值模拟相结合的方法，分析了黄土边坡地震损伤演化过程中加速度与速度响应的耦合规律，揭示了动力参数与损伤状态的关联机制。研究结果表明：黄土边坡的加速度放大效应明显，以加速度峰值为评价指标时，位于近场的黄土边坡坡顶计算烈度大于实际烈度。地震动速度与土体抗拉强度间存在线性相关关系，具有典型场地放大效应的黄土边坡建议采用速度峰值作为破坏烈度的评价指标。结合GB/T 17742—2020《中国地震烈度表》,提出包含5级损伤状态的黄土边坡地震烈度评价体系，界定各损伤等级对应的速度阈值区间及典型破坏形态，建立边坡损伤程度-烈度-速度峰值-宏观震害的四元对应准则。研究成果为黄土地区边坡地震损伤评估提供了新的理论依据和量化判据。更多还原

【Abstract】 To address the significant discrepancy between damage degree and peak values when employing traditional acceleration indices for evaluating seismic damage in loess slopes under large earthquakes at far-field and small earthquakes at near-field scenarios, this study developed a novel evaluation system based on particle vibration velocity theory. Through shaking model tests and numerical simulations, the coupling mechanisms between acceleration and velocity responses during seismic damage evolution in loess slopes were systematically investigated, revealing intrinsic correlations between dynamic parameters and damage states. The results indicate the acceleration amplification effect of loess slopes is obvious. When the peak acceleration is taken as the evaluation index, the calculated intensity of loess slope top in the near field is greater than the actual intensity. A linear correlation was established between peak particle velocity and soil tensile strength. It is suggested that the peak velocity should be used as the evaluation index of failure intensity for loess slope with typical site amplification effect. An innovative five-level seismic intensity evaluation system was proposed in accordance with GB/T 17742—2020 specifications, defining velocity threshold intervals and characteristic failure patterns for each damage level, thereby establishing a quaternion correspondence criterion integrating damage degree, intensity, peak velocity, and seismic damage characteristics. This research provides theoretical foundations and quantitative criteria for seismic damage assessment of loess slopes.更多还原