【摘要】 5%阻尼比的加速度反应谱S_a与其他强度指标（intensity measures, IM）之间的经验相关性已被广泛研究，且已被应用于概率地震危险性分析中。然而，多阻尼比S_a与其他IM之间的经验相关性却少有涉及，海洋工程结构的阻尼比往往不为5%。基于日本S-net台网获取的7 276条海底地震动记录，讨论了多阻尼比S_a与常见的9个IM的经验相关性，进一步比较了在不同阻尼比情况下加速度谱强度、速度谱强度与其他IM之间的经验相关性。结果表明，阻尼比的变化对ρ_{IM,Sa（T,ξ%）}的部分周期段具有显著影响，极差为0.2。阻尼比对ρ_{IM,ASI（ξ%）}和ρ_{IM,VSI（ξ%）}的影响相较于阻尼比对的影响较小，相关系数的极差为0.1。所给出的经验相关系数模型在预测精度方面表现出了良好的性能，可应用于广义条件地震动参数方法，为海洋工程的设计地震动时程选取以及概率地震危险性分析提供参考。更多还原

【Abstract】 The empirical correlations between the acceleration response spectrum（S_a） with 5% damping ratio and other ground motion intensity measures（IM） have been extensively studied and applied in probabilistic seismic hazard analysis. However, the empirical correlation between S_a with multiple damping ratios and other IM has rarely been explored, Furthermore, the damping ratios of marine structures often differ from 5%.Based on 7,276 records of offshore ground motions, obtained from S-net located in Japan, the empirical correlation between spectral acceleration（S_a） with multiple damping ratios and nine common intensity measures was investigated. Furthermore, the correlations between acceleration spectrum intensity, velocity spectrum intensity, and other IM under different damping ratios were compared. The results indicate that the variation in damping ratio has a significant impact on certain period ranges of, with a range of 0.2. The influence of the damping ratio on ρ_{IM,ASI（ξ%）}and ρ_{IM,VSI（ξ%）}are less pronounced compared to its effect on ρ_{IM,Sa（T,ξ%）}, with a range of correlation coefficients of 0.1.The proposed empirical correlation model demonstrates high predictive accuracy. It is applicable to the generalized conditional intensity measure method, supporting the selection of design ground motions and probabilistic seismic hazard analysis for marine structures.更多还原