• ISSN 2097-1893
  • CN 10-1855/P

近断层速度脉冲型地震动识别方法研究综述

赵晓芬 温增平

引用本文: 赵晓芬,温增平. 2023. 近断层速度脉冲型地震动识别方法研究综述. 地球与行星物理论评(中英文),54(5):532-540
Zhao X F, Wen Z P. 2023. Review of the identification of near-fault velocity pulse-like strong ground motions. Reviews of Geophysics and Planetary Physics, 54(5): 532-540 (in Chinese)

近断层速度脉冲型地震动识别方法研究综述

doi: 10.19975/j.dqyxx.2022-072
基金项目: 国家重点研发资助项目(2020YFA0710603);中国地震局地球物理研究所基本业务费(DQJB21K44)
详细信息
    作者简介:

    赵晓芬(1988-),女,助理研究员,主要从事强地面运动特性、地震动模拟的研究. E-mail:929921908@qq.com

    通讯作者:

    温增平(1964-),男,研究员,主要从事强地面运动、工程结构地震易损性分析、城市地震危险性及灾害风险分析、地震巨灾模型的研究. E-mail:wenzp@cea-igp.ac.cn

  • 中图分类号: P315.9

Review of the identification of near-fault velocity pulse-like strong ground motions

Funds: Supported by the National Key Research and Development Project (Grant No. 2020YFA0710603) and the Special Fund of the Institute of Geophysics, China Earthquake Administration (Grant No. DQJB21K44)
  • 摘要: 速度脉冲型地震动对近断层区域工程结构有特殊的破坏作用,是造成近断层区域震害的主要影响因素之一. 开展近断层速度脉冲型地震动研究对揭示近断层区域工程结构的地震破坏机理、开展抗震设防以及抗震设计具有重要价值. 速度脉冲的有效识别是关键环节,主要历经定性、半定量、定量的过程. 其中定量识别方法具有可重复性、可批量处理等优点,越来越受到广泛认可和应用. 然而目前定量速度脉冲识别方法尚未有统一的、明确的判别原则. 本文从识别条件、基本原理、关键步骤、应用范围等方面系统总结并详细介绍了目前国内外常用的三类定量速度脉冲识别方法,即基于连续小波变换的速度脉冲识别方法、基于能量的速度脉冲识别方法以及多速度脉冲定量识别方法,并推荐了这三类方法中的代表方法,分析了其优缺点. 分析指出速度脉冲识别方法的不同,本质是速度脉冲主要特征波形的提取手段以及量化的判别标准的不同. 各种方法都有自身的优势,但由于速度脉冲记录波形的不稳定性,没有任何一种方法可以达到百分之百的识别率. 此外,现有的定量识别方法都是基于信号处理方法和脉冲特性基本原理,并未考虑速度脉冲产生机制. 因此需要综合上述三点来综合判别速度脉冲,形成完善的脉冲判别体系. 最后,探讨了定量的速度脉冲识别方法进一步提升的关键问题和研究重点.

     

  • 图  1  典型近断层破裂方向性效应速度脉冲(TCU065)和滑冲效应速度脉冲(MZQ-EW)记录的速度时程和位移时程(修改自赵晓芬和温增平,2022

    Figure  1.  The velocity and displacement time histories of typical strong pulse-like ground motions caused by forward directivity and fling effects (modified from Zhao and Wen, 2022)

    图  2  2008年汶川地震51JYT记录出现显著速度脉冲的方位(引自谢俊举等,2017

    Figure  2.  Azimuth showing a distinct pulse for the 51JYT record during the 2008 Wenchuan earthquake (from Xie et al., 2017)

    图  3  以2018年台湾花莲地震中HWA028台站记录为例说明利用小波方法从原始速度脉冲记录中提取长周期脉冲信号的过程(修改自赵晓芬,2021

    Figure  3.  Extraction of long-period pulses from the original strong motion record using the wavelet method. The time history with a velocity pulse for the station, HWA028, from the 2018 Hualien earthquake is shown (modified from Zhao, 2021)

    图  4  以2018年台湾花莲地震中HWA012站为例给出方向性速度脉冲. 其中用垂线标出原始记录能量达到17%和脉冲记录中能量达到5%对应的时间(修改引自赵晓芬和温增平,2022

    Figure  4.  The HWA012 station as an example of an early-arriving pulse. The times correspond to t17%,original and t5%,pulse, and the pulses are marked with vertical lines (modified from Zhao and Wen, 2022)

    图  5  多速度脉冲定量识别方法算例. (a)以1979年美国因皮里尔河谷(Imperial Valley)地震中EI Centro Array#4台站记录为例,说明单循环速度脉冲识别;(b)以1994年北岭地震(Northridge-01)地震中LA Dam台站记录为例,说明多脉冲的识别(修改自Zhai et al., 2018

    Figure  5.  Examples of the multi-velocity pulse quantitative recognition method. (a) A pulse-like ground motion with only one velocity pulse; (b) A pulse-like ground motion with multiple velocity pulses (modified from Zhai et al., 2018)

    表  1  速度脉冲类型及对应脉冲能量临界值

    Table  1.   The types of velocity pulses and corresponding critical pulse energy values

    脉冲类型半脉冲数量脉冲能量临界值
    类型I10.30
    类型II20.42
    类型III30.50
    类型IV40.57
    类型V50.73
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  • 收稿日期:  2022-10-31
  • 修回日期:  2022-12-05
  • 录用日期:  2022-12-08
  • 网络出版日期:  2022-12-14
  • 刊出日期:  2023-09-01

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