Abstract The ground motion pulse-like effect depends on its orientation, it is thus necessary to identify the direction of the ground motion with the strongest pulse. A simple yet efficient method to identify the strongest pulse over all orientations in multicomponent ground motions is presented in this study, through rotating the ground motions to the orientation associated with the maximum peak ground velocity (PGV). It is demonstrated that the pulse-like ground motion components in the orientation with the maximum PGV value have the potential to produce the largest mean/median ductility than the components rotated to all remaining orientations. A comparison of the proposed methodology with an existing method is also performed, further demonstrating that the proposed maximum PGV methodology can accurately identify the strongest pulse. The determined strongest pulse can be utilized in engineering practice to estimate the maximum seismic demands on structures.

中文翻译：

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最强速度脉冲的方向和对脉冲状地面运动的最大结构响应

摘要 地震动的类脉冲效应取决于其方向，因此需要识别脉冲最强的地震动方向。本研究提出了一种简单而有效的方法来识别多分量地面运动中所有方向的最强脉冲，通过将地面运动旋转到与最大峰值地速 (PGV) 相关的方向。结果表明，与旋转到所有剩余方向的分量相比，具有最大 PGV 值的方向上的脉冲状地面运动分量有可能产生最大的平均/中值延展性。还对所提出的方法与现有方法进行了比较，进一步证明所提出的最大 PGV 方法可以准确识别最强脉冲。