Research on strong ground motion simulation and ShakeMap of 2014 Yutian MS7.3 earthquake
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摘要: 基于地震动的时空衰减规律和传播特征，采用邻近地震监测台站地震动时程对1 km×1 km尺度的网格点进行近实时插值计算，同时结合场地效应对震区地震动参数进行修正，并以2014年2月12日新疆于田MS7.3地震为例，计算震区格网内各点的地震时程，同时以8 s为时间间隔绘制出地震动峰值等值线图并将其连续播放，得到了于田MS7.3地震峰值地震动(PGV，PGA)的空间分布.结果表明，于田县东部至民丰县北部地区受场地条件影响，震区震害在软弱地基土层及浅地下水位等因素作用下对震区地震动具有明显的放大效应，预测的地震动特征与现场宏观调查结果是一致的.在当前强震台网分布不均匀的情形下，本文方法能较好地描述震区地震动特征，较客观地反映灾区的强地面运动特征.Abstract: Based on attenuation law and space-time propagation characteristics of seismic ground motion, we use recorded time histories from adjacent monitoring stations to make near real-time interpolation calculation in a 1 km×1 km grid, and correct ground motion parameters according to the site effects. Taking the 12th February, 2014 Yutian MS7. 3 earthquake as an example, we calculated seismic time history in each grid near the epicenter, and then plot peak ground motion contour maps with 8 s intervals continuously. Finally we showed spatial distribution of peak ground motions (PGV and PGA) of this earthquake. The results show that, influenced by site conditions as well as soft ground soil and shallow groundwater level, ground motions in the region from eastern Yutian County to northern Minfeng County were amplified obviously, which were well consistent with field survey results. On the conditions of uneven distribution of strong ground motion observation stations, the method can be used to describe the characteristics of earthquake ground motions, and reflect the characteristics of strong ground motion in disaster areas objectively.
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Keywords:
- Yutian MS7. 3 earthquake /
- seismic ground motion /
- monitoring station /
- ShakeMap
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图 1 插值计算方法(a)及插值原理(b)示意图(张红才，2008)
Figure 1. Schematic diagram of interpolation calcutation method (a) and interpolation principle (b) (after Zhang, 2008)
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图 3 2014年于田MS7.3地震加速度震动图
Figure 3. ShakeMap of acceleration for 2014 Yutian MS7.3 earthquake
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图 4 2014年于田MS7.3地震速度震动图
Figure 4. ShakeMap of velocity for 2014 Yutian MS7.3 earthquake
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图 5 插值网格点峰值加速度(a)和峰值速度(b)等值线图
Figure 5. Contour map of PGA (a) and PGV (b) of grid nodes
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图 7 预测与现场调查烈度对比图
Figure 7. Comparison of intensity between prediction and investigation
表 1 场地放大系数
Table 1 Site amplification factor
场地条件 Ⅱ类场地PGA/(cm·s-2) 50 100 150 200 300 400 Ⅰ0 0.72 0.74 0.75 0.76 0.85 0.90 Ⅰ1 0.80 0.82 0.83 0.85 0.95 1.00 Ⅱ 1.00 1.00 1.00 1.00 1.00 1.00 Ⅲ 1.30 1.25 1.15 1.00 1.00 1.00 Ⅳ 1.25 1.20 1.10 1.00 0.95 0.90 
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表 2 本文所用台站及其主要参数
Table 2 Stations and main parameters used in this paper
台站名称 震中距/km 岩性 主要仪器类型 于田 61.1 灰绿岩 CTS-1E, EDAS-24IP 应急B 115.2 变质岩 CMG-40T, EDAS-24IP 和田台阵0 214.6 砂岩 CTS-1E, EDAS-24IP 叶城 432.3 石英砾岩 CMG-3ESPC, EDAS-24IP 且末 267.4 灰白色花岗岩 CTS-1E, EDAS-24IP 若羌 423.4 变质泥岩 CTS-1E, EDAS-24IP 狮泉河 419.6 变质泥岩 CTS-1E, EDAS-24IP 改则 432.8 变质泥岩 CTS-1E, EDAS-24IP 阿拉尔 483.4 混合花岗岩 FSS-3BDH, EDAS-24IP 巴楚 493.4 变质岩 CTS-1E, EDAS-24L6 西克尔 499.2 灰岩 BBVS-60, EDAS-24IP 乌什 513.6 变质岩 CTS-1E, EDAS-24IP 阿克苏 502.8 变质岩 CTS-1E, EDAS-24IP 神木园 519.4 变质岩 CTS-1E, EDAS-24IP
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陈鲲, 俞言祥, 高孟潭. 2010.考虑场地效应的ShakeMap系统研究[J].中国地震, 26 (1): 92-102. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGZD201001010.htm Chen K, Yu Y X, Gao M T. 2010. Research on ShakeMap system in terms of the site effect[J]. Earthquake Research in China, 26 (1): 92-102 (in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-ZGZD201001010.htm
霍俊荣, 胡聿贤. 1992.地震动峰值参数衰减规律的研究[J].地震工程与工程振动, 12 (2): 1-11. http://www.cnki.com.cn/Article/CJFDTOTAL-DGGC199202000.htm Huo J R, Hu Y X. 1992. Study on attenuation laws of ground motion parameters[J]. Earthquake Engineering and Engineering Vibration, 12 (2): 1-11 (in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-DGGC199202000.htm
李铂, 董翔, 陈亚红, 何琳, 于澄. 2012.线源地震影响场计算模型[J].地震地磁观测与研究, 33 (3): 14-19. http://www.cnki.com.cn/Article/CJFDTOTAL-DZGJ2012Z1006.htm Li B, Dong X, Chen Y H, He L, Yu C. 2012. Realization of calculation model of line-source effect fields[J]. Seismic Geomagnetic Observation and Research, 33 (3): 14-19 (in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-DZGJ2012Z1006.htm
李海兵, 孙知明, 潘家伟, 刘栋梁, 张佳佳, 李成龙, 刘亢, 云锟, 龚正. 2014. 2014年于田MS7.3地震野外调查:特殊的地表破裂带[J].地球学报, 35 (3): 391-394. http://www.oalib.com/paper/4868084 Li H B, Sun Z M, Pan J W, Liu D L, Zhang J J, Li C L, Liu K, Yun K, Gong Z. 2014. Field study of the 12 February 2014 Yutian MS7.3 earthquake: A special surface rupture zone[J]. Acta Geoscientica Sinica, 35 (3): 391-394 (in Chinese). http://www.oalib.com/paper/4868084
刘军, 宋立军, 胡伟华, 李帅. 2014.新疆地区场地条件分区及其矢量化[J].内陆地震, 28 (1): 70-74. http://www.cnki.com.cn/Article/CJFDTOTAL-LLDZ201401010.htm Liu J, Song L J, Hu W H, Li S. 2014. Zoning and vectorize of site condition in Xinjiang[J]. Inland Earthquake, 28 (1): 70-74 (in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-LLDZ201401010.htm
金星, 张红才, 韦永祥, 李军. 2010.基于地震监测台网资料近实时插值计算震动图的初步研究[J].防灾减灾学报, 26 (1): 1-11. http://www.cnki.com.cn/Article/CJFDTOTAL-DDYJ201001002.htm Jin X, Zhang H C, Wei Y X, Li J. 2010. Preliminary study of near real-time interpolation calculation of ShakeMap based on seismic monitoring network's information[J]. Journal of Disaster Prevention and Reduction, 26 (1): 1-11 (in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-DDYJ201001002.htm
孟令媛, 周龙泉, 刘杰. 2014. 2014年新疆于田MS7.3地震近断层强地面运动模拟及烈度分布估计[J].地震学报, 36 (3): 362-371. http://www.dzxb.org/Magazine/Show?id=28966 Meng L Y, Zhou L Q, Liu J. 2014. Estimation of near-fault strong ground motion and intensity distribution of the 2014 Yutian, Xinjiang MS7.3 earthquake[J]. Acta Seismologica Sinica, 36 (3): 362-371 (in Chinese). http://www.dzxb.org/Magazine/Show?id=28966
姚远, 伊力亚尔·阿不力孜, 吴传勇, 吴国栋, 陈建波. 2014. 2014年2月12日新疆于田MS7.3地震发震构造初步研究[J].内陆地震, 28 (2): 121-126. Yao Y, Yiliyar·Abulizi, Wu C Y, Wu G D, Chen J B. 2014. Preliminary study on seismogenic structure of Yutian MS7.3 earthquake on Feb.12, 2014[J]. Inland Earthquake,28 (2):121-126 (in Chinese).
张红才. 2008.基于地震监测台网资料的震动图及震动烈度研究[D].哈尔滨:中国地震局工程力学研究所: 17-23. Zhang H C. 2008. Research on ShakeMaps and Shaking Intensity Based on Records of Monitoring Network[D]. Harbin: Institute of Engineering Mechanics, China Earthquake Administration: 17-23 (in Chinese).
张勇, 许力生, 陈运泰, 汪荣江. 2014. 2014年2月12日于田MW6.9地震破裂过程初步反演:兼论震源机制对地震破裂过程反演的影响[J].地震学报, 36 (2): 159-164. http://www.dzxb.org/Magazine/Show?id=28961 Zhang Y, Xu L S, Chen Y T, Wang R J. 2014. Fast inversion for the rupture process of the 12 February 2014 Yutian MW6.9 earthquake: Discussion on the impacts of focal mechanisms on rupture process inversions[J]. Acta Seismologica Sinica, 36 (2): 159-164 (in Chinese). http://www.dzxb.org/Magazine/Show?id=28961
张振斌, 唐丽华. 2010.新疆南天山地区土层场地地震动峰值加速度衰减关系[J].中国地震, 26 (4): 401-406. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGZD201004007.htm Zhang Z B, Tang L H. 2010. The attenuation relationship of peak ground motion acceleration on soil site at the south Tianshan region in Xinjiang[J]. Earthquake Research in China, 26 (4): 401-406 (in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-ZGZD201004007.htm
张振国, 张伟, 孙耀充, 朱耿尚, 文健, 陈晓非. 2014. 2014年2月12日新疆于田地震强地面运动初步模拟及烈度预测[J].地球物理学报, 57 (2): 685-689. http://www.cnki.com.cn/Article/CJFDTOTAL-DQWX201402032.htm Zhang Z G, Zhang W, Sun Y C, Zhu G S, Wen J, Chen X F. 2014. Preliminary simulation pf strong ground motion for Yutian, Xinjiang earthquake of 12 February 2014, and hazard implication [J]. Chinese Journal of Geophysics, 57 (2): 685-689 (in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-DQWX201402032.htm
中华人民共和国国家质量监督检验检疫总局, 中国国家标准化管理委员会. 2008.中国地震烈度表(GB/T17742-2008)[S].北京:中国标准出版社:5-7. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China. 2008. The Chinese Seismic Intensity Scale (GB/T 17742-2008)[S].Beijing: Standards Press of China: 5-7.
中华人民共和国国家质量监督检验检疫总局, 中国国家标准化管理委员会. 2015.中国地震动参数区划图(GB/T18306-2015)[S].北京:中国标准出版社: 6-10. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China. 2015. China Seismic Parameter Zoning Map (GB/T 18306-2015)[S]. Beijing: Standards Press of China: 6-10.
Borcherdt R D. 1994. Estimates of site-dependent response spectra for design (methodology and justification)[J]. Earthquake Spectra, 10 (4): 617-653. doi: 10.1193/1.1585791
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