Abstract Filtering is one of the critical steps of earthquake ground motion processing before its application to engineering practice, and high-pass filtering is particularly important due to rich contents of low frequency in ground motion signals. In particular, the impulsive properties of the ground motion recorded in near-fault zones are susceptible to the high-pass filtering, and thus selecting a reasonable filtering method becomes a critical issue that determines the reliability of the structural analysis results. This study investigates how the high-pass filtering of pulse-like ground motions affect the subsequent responses of long-period base-isolated building. A set of near-fault ground motions were selected and classified into short-to-mid and mid-to-long period groups, with 2 s being the threshold, and they were subjected to filter with varied parameters. The filtering induced variations of elastic response spectra, inelastic response spectra, and the impulsive property identification were analyzed. The highest cutting frequency of 0.20 Hz and 0.10 Hz of the high-pass filter were recommended for short-to-mid and mid-to-long period pulse records, respectively, while the impulse properties and spectral properties of engineering interest were not disturbed considerably. The ground motions were input to a high-rise base-isolated building, and the responses were computed from different filtering settings and compared, which further verified the suggested high-pass filtering method for pulse-like ground motions.

中文翻译：

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近断层地震记录高通滤波对隔震建筑物响应的影响

摘要 滤波是地震地震动处理应用于工程实践之前的关键步骤之一，而由于地震动信号中低频内容丰富，高通滤波显得尤为重要。特别是近断层带记录的地震动脉冲特性容易受到高通滤波的影响，因此选择合理的滤波方法成为决定结构分析结果可靠性的关键问题。本研究探讨了脉冲状地面运动的高通滤波如何影响长周期基础隔震建筑的后续响应。选取一组近断层地震动，分为中短周期组和中长周期组，以2 s为阈值，他们接受了不同参数的过滤。分析了滤波引起的弹性响应谱、非弹性响应谱和脉冲特性识别的变化。高通滤波器的最高截止频率分别为 0.20 Hz 和 0.10 Hz 分别推荐用于中短周期脉冲记录，而工程兴趣的脉冲特性和频谱特性没有受到很大干扰. 将地震动输入到高层基础隔震建筑物中，通过不同的滤波设置计算响应并进行比较，进一步验证了所建议的脉冲式地震动高通滤波方法。并对脉冲属性识别进行了分析。高通滤波器的最高截止频率分别为 0.20 Hz 和 0.10 Hz 分别推荐用于中短周期脉冲记录，而工程兴趣的脉冲特性和频谱特性没有受到很大干扰. 将地震动输入到高层基础隔震建筑物中，通过不同的滤波设置计算响应并进行比较，进一步验证了所建议的脉冲式地震动高通滤波方法。并对脉冲属性识别进行了分析。高通滤波器的最高截止频率分别为 0.20 Hz 和 0.10 Hz 分别推荐用于中短周期脉冲记录，而工程兴趣的脉冲特性和频谱特性没有受到很大干扰. 将地震动输入到高层基础隔震建筑物中，通过不同的滤波设置计算响应并进行比较，进一步验证了所建议的脉冲式地震动高通滤波方法。而工程兴趣的脉冲特性和光谱特性没有受到很大的干扰。将地震动输入到高层基础隔震建筑物中，通过不同的滤波设置计算响应并进行比较，进一步验证了所建议的脉冲式地震动高通滤波方法。而工程兴趣的脉冲特性和光谱特性没有受到很大的干扰。将地震动输入到高层基础隔震建筑物中，通过不同的滤波设置计算响应并进行比较，进一步验证了所建议的脉冲式地震动高通滤波方法。