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Housner谱烈度的一种快速近似算法

张立宝 王玉石 李小军 兰日清

张立宝, 王玉石, 李小军, 兰日清. Housner谱烈度的一种快速近似算法[J]. 震灾防御技术, 2018, 13(4): 775-783. doi: 10.11899/zzfy20180405
引用本文: 张立宝, 王玉石, 李小军, 兰日清. Housner谱烈度的一种快速近似算法[J]. 震灾防御技术, 2018, 13(4): 775-783. doi: 10.11899/zzfy20180405
Zhang Libao, Wang Yushi, Li Xiaojun, Lan Riqing. A Fast Approximation Algorithm for Housner's Spectral Intensity[J]. Technology for Earthquake Disaster Prevention, 2018, 13(4): 775-783. doi: 10.11899/zzfy20180405
Citation: Zhang Libao, Wang Yushi, Li Xiaojun, Lan Riqing. A Fast Approximation Algorithm for Housner's Spectral Intensity[J]. Technology for Earthquake Disaster Prevention, 2018, 13(4): 775-783. doi: 10.11899/zzfy20180405

Housner谱烈度的一种快速近似算法

doi: 10.11899/zzfy20180405
基金项目: 

中国地震局地球物理研究所基本科研业务费专项 DQJB15C11

国家自然科学基金 51578514

国家自然科学基金 51639006

详细信息
    作者简介:

    张立宝, 男, 生于1992年。硕士研究生。主要从事强震动观测数据分析与处理研究。E-mail:zhou45118@outlook.com

    通讯作者:

    王玉石, 男, 生于1982年。副研究员。主要从事地震场地效应与强震动观测技术研究。E-mail:wangyushi1982@126.com

A Fast Approximation Algorithm for Housner's Spectral Intensity

  • 摘要: Housner谱烈度及修正谱烈度作为基于加速度记录时程直接得到的地震动强度参数,与建筑结构破坏及地震宏观烈度存在较高的相关性,是可靠的地震仪器烈度物理参数指标。然而,相对于地面加速度峰值、地面速度峰值等地震动峰值参数,三分量加速度记录对应的谱烈度计算过程较为复杂,耗时相对较长,影响了利用谱烈度确定地震仪器烈度的时效性。基于对强震动加速度记录的统计分析,本文提出了谱烈度的快速近似算法,仅计算4个方向上的谱烈度值,采用其中3点作圆即可获得水平面内谱烈度迹线的近似最大值,使计算速度提高了45倍,且保持了谱烈度作为地震仪器烈度物理指标的精度。利用在汶川MS 8.0地震等386次MS > 3.0地震中获取的2701组强震动加速度记录,经可靠性检验,结果表明所提出的Housner谱烈度快速近似算法的计算误差在±4.5%以内,可以同时满足地震仪器烈度速报的可靠性和时效性需求。
  • 图  1  谱烈度计算方法(以汶川地震绵竹清平台记录为例)

    Figure  1.  Calculation method for Housner spectum intensity at station 051MZQ in the Wenchuan earthquake

    图  2  谱烈度迹线统计特征

    Figure  2.  Statistical characteristics for the trace of Housner spectum intensity in the horizontal plane

    图  3  加速度记录谱烈度快速算法

    Figure  3.  Fast calculating algorithm for Housner spectum intensity of a three-component acceleration record

    图  4  加速度记录谱烈度快速算法可靠性

    Figure  4.  Reliability of fast calculating algorithm for Housner spectum intensity

    表  1  算法可靠性验证所用强震动记录的数量统计

    Table  1.   Acceleration records used in reliability veritification of fast calculating algorithm for Housner spectum intensity

    震级 PGA/cm·s-2
    PGA<3 3≤PGA<10 10≤PGA<30 30≤PGA<100 100≤PGA<300 300≤PGA<500 PGA≥500
    MS=8.0 64 135 132 64 44 6 5
    MS=7.0 20 39 31 21 7 5 3
    MS=6.5 26 31 11 3 2 1
    6.0≤MS<6.5 21 84 76 29 7
    5.5≤MS<6.0 29 103 65 40 8 1
    5.0≤MS<5.5 36 201 89 31 6
    4.5≤MS<5.0 74 270 119 27 3
    4.0≤MS<4.5 96 296 145 30 7
    3.0≤MS<4.0 18 84 43 13
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  • 收稿日期:  2018-02-10
  • 刊出日期:  2018-12-01

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