ABSTRACT

This manuscript quantifies the effects of aftershocks with pulse characteristics on the cumulative damage of structures. The revised randomization method is developed to generate the artificial mainshock-aftershock (MSAS) ground motions showing pulse characteristics. The efficiency of period normalization is discussed from the point of view of dispersion, and the effects of the aftershocks are quantitatively studied. It is found that strong aftershock can contaminate the efficiency of period normalization, and the effects of strong aftershocks in the near-fault region on cumulative damage can exceed 20% and reach 40%. The equations are proposed for the prediction of damage induced by pulse-like MSAS sequences.

摘要

这份手稿量化了具有脉冲特征的余震对结构累积损伤的影响。改进的随机化方法用于生成显示脉冲特征的人工主震-余震 (MSAS) 地震动。从离散的角度讨论了周期归一化的效率，定量研究了余震的影响。研究发现，强余震会污染周期归一化效率，近断层区强余震对累积破坏的影响可超过20%，达到40%。所提出的方程用于预测由类似脉冲的 MSAS 序列引起的损伤。