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作者:

Liu, Ping (Liu, Ping.) | Li, Ning (Li, Ning.) | Ma, Hua (Ma, Hua.) | Xie, Lili (Xie, Lili.) | Zhou, Baofeng (Zhou, Baofeng.)

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摘要:

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.

关键词:

velocity pulse relative energy zero-crossing ratio short-time input energy pulse-like ground motion short-time zero crossing rate

作者机构:

  • [ 1 ] [Liu, Ping]Tianjin Univ, Sch Civil Engn, Key Lab Coast Civil Struct Safety, Minist Educ, Tianjin 300072, Peoples R China
  • [ 2 ] [Li, Ning]Tianjin Univ, Sch Civil Engn, Key Lab Coast Civil Struct Safety, Minist Educ, Tianjin 300072, Peoples R China
  • [ 3 ] [Liu, Ping]Tianjin Univ, Renai Coll, Tianjin 301636, Peoples R China
  • [ 4 ] [Li, Ning]Tianjin Univ, China Earthquake Adm, Key Lab Earthquake Engn Simulat & Seism Resilienc, Tianjin 300350, Peoples R China
  • [ 5 ] [Ma, Hua]Beijing Univ Technol, Key Lab Engn & Struct Retrofit, Beijing 100124, Peoples R China
  • [ 6 ] [Xie, Lili]China Earthquake Adm, Inst Engn Mech, Key Lab Earthquake Engn & Engn Vibrat, Harbin 150080, Peoples R China
  • [ 7 ] [Zhou, Baofeng]China Earthquake Adm, Inst Engn Mech, Key Lab Earthquake Engn & Engn Vibrat, Harbin 150080, Peoples R China

通讯作者信息:

  • [Li, Ning]Tianjin Univ, Sch Civil Engn, Key Lab Coast Civil Struct Safety, Minist Educ, Tianjin 300072, Peoples R China

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来源 :

EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION

ISSN: 1671-3664

年份: 2020

期: 1

卷: 19

页码: 1-16

2 . 8 0 0

JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:115

被引次数:

WoS核心集被引频次: 12

SCOPUS被引频次: 9

ESI高被引论文在榜: 0 展开所有

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