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Relative energy zero ratio-based approach for identifying pulse-like ground motions

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Abstract

Pulse-like ground motions are capable of inflicting significant damage to structures. Efficient classification of pulse-like ground motion is of great importance when performing the seismic assessment in near-fault regions. In this study, a new method for identifying the velocity pulses is proposed, based on different trends of two parameters: the short-time energy and the short-time zero crossing rate of a ground motion record. A new pulse indicator, the relative energy zero ratio (REZR), is defined to qualitatively identify pulse-like features. The threshold for pulse-like ground motions is derived and compared with two other identification methods through statistical analysis. The proposed procedure not only shows good accuracy and efficiency when identifying pulse-like ground motions but also exhibits good performance for classifying records with high-frequency noise and discontinuous pulses. The REZR method does not require a waveform formula to express and fit the potential velocity pulses; it is a purely signal-based classification method. Finally, the proposed procedure is used to evaluate the contribution of pulse-like motions to the total input energy of a seismic record, which dramatically increases the seismic damage potential.

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Authors and Affiliations

  1. School of Civil Engineering /Key Laboratory of Coast Civil Structure Safety, Ministry of Education (Tian** University), Tian**, 300072, China

    ** Liu & Ning Li

  2. Ren’ai College, Tian** University, Tian**, 301636, China

    ** Liu

  3. Key Laboratory of Earthquake Engineering Simulation and Seismic Resilience of China Earthquake Administration (Tian** University), Tian**, 300350, China

    Ning Li

  4. Key Laboratory of Engineering and Structural Retrofit, Bei**g University of Technology, Bei**g, 100124, China

    Hua Ma

  5. Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin, 150080, China

    Lili **e & Baofeng Zhou

Authors
  1. ** Liu
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  2. Ning Li
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  3. Hua Ma
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  4. Lili **e
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  5. Baofeng Zhou
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Corresponding author

Correspondence to Ning Li.

Additional information

Supported by: National Natural Science Foundation of China under Grant Nos. 51378341, 51427901 and 51678407, and National Key Research and Development Program under Grant No. 2016YFC0701108

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Liu, P., Li, N., Ma, H. et al. Relative energy zero ratio-based approach for identifying pulse-like ground motions. Earthq. Eng. Eng. Vib. 19, 1–16 (2020). https://doi.org/10.1007/s11803-020-0544-3

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  • DOI: https://doi.org/10.1007/s11803-020-0544-3

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