1999年台湾集集MW7.6地震跨断层场地相对运动

徐龙军 吕淼 张恒 于越 谢礼立

徐龙军,吕淼,张恒,于越,谢礼立. 2023. 1999年台湾集集MW7.6地震跨断层场地相对运动. 地震学报,45(0):1−16 doi: 10.11939/jass.20220170
引用本文: 徐龙军,吕淼,张恒,于越,谢礼立. 2023. 1999年台湾集集MW7.6地震跨断层场地相对运动. 地震学报,45(0):1−16 doi: 10.11939/jass.20220170
Xu L J,Lü M,Zhang H,Yu Y,Xie L L. 2023. Relative motions for cross-fault sites of the 1999 MW7.6 Taiwan Chi-Chi earthquake. Acta Seismologica Sinica,45(0):1−16 doi: 10.11939/jass.20220170
Citation: Xu L J,Lü M,Zhang H,Yu Y,Xie L L. 2023. Relative motions for cross-fault sites of the 1999 MW7.6 Taiwan Chi-Chi earthquake. Acta Seismologica Sinica45(0):1−16 doi: 10.11939/jass.20220170

1999年台湾集集MW7.6地震跨断层场地相对运动

doi: 10.11939/jass.20220170
基金项目: 国家自然科学(地震联合)基金(U2139207)资助
详细信息
    通讯作者:

    徐龙军,博士,教授,主要从事防灾减灾工程方面的研究,e-mail:jhxulongjun@163.com

  • 中图分类号: P315.8

Relative motions for cross-fault sites of the 1999 MW7.6 Taiwan Chi-Chi earthquake

  • 摘要: 为了获得断层地震动准确的残余位移信息,提出了一种变步长网格搜索地震动基线校正处理方法。基于1999年我国台湾MW7.6集集地震强震运动数据,探讨了断层附近地震动的位移特征,又通过地震动时程初始时刻的校正,获得了集集地震多组上、下盘台站之间的相对运动时程数据,分析了分别靠近断层的上、下盘场地之间相对运动的位移时程特征。结果显示,地震动的滑冲效应显著,断层的平均滑冲速度可高达1.4 m/s;断层盘间的相对运动类似于断层地震动的运动特征,且幅值更大;断层的残余位移约是盘间最大相对位移的80%.

     

  • 图  1  1999年9月21日台湾集集地震断层和台站分布示意图

    Figure  1.  Schematic diagram of the fault and stations distribution of the Chi-Chi earthquake in Taiwan on 21 September 1999

    图  2  速度时程基线校正示意图

    Figure  2.  Schematic diagram of baseline correction for velocity time history

    图  3  本文方法与PEER方法处理的断层地震动位移时程比较

    Figure  3.  Comparison of fault ground motion displacement time histories processed by the proposed method and PEER method

    4  上盘台站强震记录三分量EW (右),NS (中),UD (右)的位移时程

    蓝色划线表示位移的最值;红色划线表示位移初始值或最终值(下图同)

    4.  Displacement time histories of strong earthquake records at the hanging wall station

    The blue line indicates the maximum displacement;The red line indicates the initial or final displacement value,the same below(a) TCU068;(b) TCU052; (c) TCU072;(d) TCU071

    图  4  上盘台站强震记录三分量EW (右),NS (中),UD (右)的位移时程

    蓝色划线表示位移的最值;红色划线表示位移初始值或最终值(下图同)

    Figure  4.  Displacement time histories of strong earthquake records at the hanging wall station

    The blue line indicates the maximum displacement;The red line indicates the initial or final displacement value,the same below(e) TCU089;(f) TCU078

    图  5  强震位移时程形态典型特征

    (a) TCU052台站EW分量;(b) TCU054台站NS分量;(c) TCU075台站UD分量

    Figure  5.  Typical morphological characteristics of strong earthquake displacement time history

    (a) EW component of TCU052 station;(b) N-S component at TCU054 station;(c) U-D component at TCU075 station

    6  六组上、下盘台站的EW (左),NS (中)和UD (右)分量的相对位移时程

    6.  Relative displacement time history of six groups of the hanging wall and footwall stations

    (a) TCU068-TCU103;(b) TCU052-TCU054;

    图  6  六组上、下盘台站的EW (左),NS (中)和UD (右)分量的相对位移时程

    Figure  6.  Relative displacement time history of six groups of the hanging wall and footwall stations

    (c) TCU072-TCU067; (d) TCU071-TCU075;(e) TCU089-TCU076;(f) TCU078-TCU122

    图  7  上下盘台站相对最大位移与残余位移关系

    Figure  7.  Relationship between relative maximum displacement and residual displacement of hanging wall and footwall stations

    图  8  上、下盘台站强震相对位移时程典型特征

    (a) TCU052-TCU054 EW分量的相对位移时程;(b) TCU072-TCU067 EW分量的相对位移时程;(c) TCU072-TCU067 UD分量的相对位移时程

    Figure  8.  Typical characteristics of relative displacement time history of strong earthquake records at hanging wall and footwall stations

    (a) TCU052—054 E-W relative displacement time history (b) TCU072—067 E-W relative displacement time history (c) TCU072—067 U-D relative displacement time history

    图  9  集集地震土木工程断层破坏7例

    (a) 石岗大坝(TCU068-TCU103);(b) 北丰桥(TCU068-TCU103);(c) 欢乐谷公寓群(TCU068-TCU103);(d) 第一公园大桥(TCU052-TCU054);(e) 光复中学(TUC071-TCU075);(f) 乌溪桥(TUC071-TCU075);(g) 刘眉桥(TCU078-TCU122)

    Figure  9.  Seven cases of civil engineering fault failure in Chi-Chi earthquake

    (a) Shigang Dam (TCU068-TCU103);(b) Beifeng Bridge (TCU068-TCU103);(c) Happy Valley Apartments (TCU068-TCU103);(d) The First Park Bridge (TCU052-TCU054);(e) Guangfu Middle School (TUC071-TCU075);(f) Wuxi Bridge (TUC071-TCU075);(g) Liumei Bridge (TCU078-TCU122)

    图  10  四组上、下盘台站的空间相对位移时程

    不同颜色代表不同时间。0 s—20.312 5 s红色;20.312 5 s—40.625 s橘色; 40.625 s—60.937 5 s黄色;60.937 5 s—81.25 s绿色;81.25 s—101.562 5 s浅蓝色;101.562 5 s —121.875 s深蓝色;超过121.875 s 粉红色

    Figure  10.  Spatial relative displacement time history of the four groups of hanging wall and footwall stations

    Different colors represent different times,0 s−20.312 5 s red;20.312 5 s−40.625 s Orange;40.625 s−60.937 5 s Yellow; 60.937 5 s−81.25 s green;81.25 s−101.562 5 s light blue; 101.562 5 s−121.875 s dark blue;Pink for more than 121.875 s(a) TCU068-TCU103;(b)TCU052-TCU054;(c) TCU071-TCU075;(d) TCU078-TCU122

    图  11  跨断层场点间相对位移值与场点间距的关系

    Figure  11.  Relationship between relative displacement values and field spacing across fault sites

    图  12  逆断层盘间相对位移趋势示意图

    Figure  12.  Schematic diagram of relative displacement trend between reverse fault disks

    表  1  台湾集集地震地震动台站位置信息

    Table  1.   Location information of ground motion station of Chi-Chi earthquake in Taiwan region

    断层盘台站东经/°度(E)北纬/° (N)海拔/km (km)断层距/km (km)
    上盘TCU068120.824.30.2760.071
    TCU052120.724.20.1700.092
    TCU072120.824.00.36313.021
    TCU071120.824.00.18710.003
    TCU089120.923.90.02015.277
    TCU078120.823.80.27214.402
    下盘TCU103120.724.30.2225.982
    TCU054120.724.20.0977.029
    TCU067120.724.10.0730.716
    TCU075120.724.00.0961.209
    TCU120120.624.00.2287.793
    TCU118120.424.00.00830.496
    TCU076120.724.00.1033.653
    TCU129120.723.90.1103.059
    TCU122120.623.80.07510.996
    CHY024120.623.80.08512.255
    数据来源于台湾气象厅公开发行的光盘(Lee et al,2001
    下载: 导出CSV

    表  2  1999年集集地震上、下盘台站本文所选组对情况

    Table  2.   Group matching of hanging wall and footwall stations of the 1999 Chi-Chi earthquake in this paper

    台站组队
    上盘TCU068TCU052TCU072TCU071TCU089TCU078
    下盘TCU103TCU054TCU067TCU075TCU075TCU122
    下载: 导出CSV

    表  3  上盘台站强震记录位移最大值及残余位移

    Table  3.   Maximum displacement and residual displacement of strong earthquake records at the hanging wall stations

    上盘台站EWNSUD
    最大位移/m残余位移/m最大位移/m残余位移/m最大位移/m残余位移/m
    TCU068 7.06 5.81 8.61 5.94 4.52 3.45
    TCU052 4.99 3.94 7.18 6.78 3.92 3.16
    TCU072 2.02 1.80 2.35 2.00 1.33 1.16
    TCU071 1.76 1.19 2.61 0.15 2.26 1.74
    TCU089 1.91 1.81 1.37 1.18 0.24 0.03
    TCU078 1.21 1.19 0.85 0.66 0.35 0.25
    下载: 导出CSV

    表  4  上、下盘台站强震相对位移最大值及残余位移

    Table  4.   Maximum relative displacement and residual displacementof strong earthquake records at hanging wall and footwall stations

    上、下盘台站EW分量 NS分量 UD分量
    最大位移/m残余位移/m 最大位移/m残余位移/m 最大位移/m残余位移/m
    TCU068-TCU103 7.54 6.21 9.11 6.47 4.09 3.33
    TCU052-TCU054 5.57 4.50 7.81 7.08 3.81 3.29
    TCU072-TCU067 3.46 3.02 3.27 2.97 1.59 1.41
    TCU071-TCU075 2.89 2.28 2.99 2.52 2.55 1.74
    TCU089-TCU067 2.82 2.50 1.72 1.42 0.39 0.26
    TCU078-TCU122 2.06 1.82 1.26 1.16 0.35 0.18
    下载: 导出CSV

    表  5  工程破坏现场地表位错与附近断层上、下盘台站位错计算值的比较

    Table  5.   Comparison of calculated values of surface dislocations at the site of engineering failure with those at the hanging wall and footwall stations nearby faults

    工程名称上、下盘台站台站间距/km位错观察值/m位错计算值/m备注
    石岗大坝TCU068-TCU1036.058.003.33上下
    北丰桥5.50上下
    欢乐公寓群3.50上下
    第一公园大桥TCU052-TCU0547.124.003.29上下
    光复中学TCU071-TCU07511.212.501.74上下
    乌溪桥2.002.61水平
    刘眉桥TCU078-TCU12225.400.200.18上下
    下载: 导出CSV
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  • 收稿日期:  2022-09-12
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