断层面位错不均匀性对地表同震变形的影响研究

doi:10.13722/j.cnki.jrme.2020.0431

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Abstract In this paper，the distribution of dislocations on the fault plane is discussed，and a new type of dislocation distribution mode, taking into account the unevenness of the dislocations on the fault plane, is proposed based on the asperity model. This model is based on Somerville theory and empirical formulas to divide the distribution of asperity on the fault plane and to analyze the influence of fault dislocation on the co-seismic deformation. By solving the co-seismic deformation in the asperity dislocation distribution mode，the variation characteristics of the surface displacement field with the asperity position were obtained. Taking the Mw6.95 Loma Prieta earthquake in 1989 as an example，the calculation results of the asperity dislocation distribution mode were compared with the uniform distribution and the real distribution to verify the accuracy of the asperity distribution mode. Finally，the effect of dislocation distribution mode on the surface co-seismic deformation under different fault types is analyzed，which reveals the shortcomings of the uniform dislocation distribution mode. The research results can provide a guidance for the risk assessment of active faults.

Key words： earthquake engineering earthquake disaster active fault surface deformation dislocation asperity model

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	ZHAO Boming1
	2
	ZHAO Tianci1
	2
	ZHOU Yushu1
	2

Cite this article:

ZHAO Boming1,2,ZHAO Tianci1, et al. Study on the influence of dislocation unevenness of fault plane on ground co-seismic deformation[J]. , 2020, 39(12): 2517-2529.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0431 OR https://rockmech.whrsm.ac.cn/EN/Y2020/V39/I12/2517

[1] STEKETEE J A. On Volterra¢s dislocations in a semi-infinite elastic medium[J]. Canadian Journal of Physics，1958，36(2)：192–205.
[2] IWASAKI T，SATO R. Strain field in a semi-infinite medium due to an inclined rectangular fault[J]. Journal of Physics of the Earth，1979，27(4)：285–314.
[3] 赵大江. 位错模型模拟昆仑山断层不均匀错动引起的地面变形[硕士学位论文][D]. 西安：长安大学，2008.(ZHAO Dajiang. Dislocation model simulates ground deformation caused by uneven displacement of Kunlun Mountain fault[M. S. Thesis][D]. Xi¢an：Chang'an University，2008. (in Chinese))
[4] 徐昊，孙玉军，吴中海. 岩石圈结构对大地震震后形变的影响——以1976年唐山大地震和2001年昆仑山大地震为例[J]. 地球物理学报，2018，61(8)：3 170–3 184.(XU Hao，SUN Yujun，WU Zhonghai. Effects of lithospheric structure on post-earthquake deformation of large earthquakes：A case study of the Tangshan earthquake in 1976 and the Kunlun earthquake in 2001[J]. Chinese Journal of Geophysics，2018，61(8)：3 170–3 184.(in Chinese))
[5] 郝民. 断层运动引起的地面永久变形分析[C]// 第一届全国工程安全与防护学术会议论文集. [S. l.]：[s. n.]，2008：5.(HAO Min. Analysis of ground permanent deformation caused by fault movement[C]// Proceedings of the First National Conference on Engineering Safety and Protection. [S. l.]：[s. n.]，2008：5.(in Chinese))
[6] 白玉柱，徐杰，徐锡伟，等. 2008年汶川8.0级地震地表位移场的模拟——映秀—北川断裂逆冲兼右旋走滑错动形成的地表位移场[J]. 地震地质，2010，32(1)：16–27.(BAI Yuzhu，XU Jie，XU Xiwei，et al. Simulation of surface displacement field of Wenchuan M8.0 earthquake in 2008—The surface displacement field formed by Yingxiu—Beichuan fault thrust and right-lateral strike-slip movement[J]. Seismology and Geology，2010，32(1)：16–27.(in Chinese))
[7] 吴章明，袁岩光. 地震地表破裂与发震断层的性状[J]. 灾害学，1990，(4)：14–19.(WU Zhangming，YUAN Yanguang. Characteristics of Earthquake Surface Rupture and Seismogenic Faults[J]. Journal of Catastrophology，1990，(4)：14–19.(in Chinese))
[8] 谈洪波，申重阳，李辉，等. 断层位错引起的地表形变特征[J].大地测量与地球动力学，2009，29(3)：42–49.(TAN Hongbo，SHEN Chongyang，LI Hui，et al. Surface deformation characteristics caused by fault dislocations[J]. Journal of Geodesy and Geodynamics，2009，29(3)：42–49.(in Chinese))
[9] OKADA Y. Surface deformation due to shear and tensile faults in a half-space[J]. Bulletin of the Seismological Society of America，1985，75(4)：1 135–1 154.
[10] OKADA Y. Internal deformation due to shear and tensile faults in a half-space[J]. Bulletin of the Seismological Society of America，1992，82(2)：1 018–1 040.
[11] HEKI K，MIYAZAKI S I，TSUJI H. Silent fault slip following an interplate thrust earthquake at the Japan Trench[J]. Nature，1997，386：595–598.
[12] FU G，SUN W. Effects of spatial distribution of fault slip on calculating co-seismic displacement：Case studies of the Chi-Chi earthquake(Mw7.6) and the Kunlun earthquake(Mw7.8)[J]. Geophysical research letters，2004，31(21)：L21 601.
[13] SUN W. Asymptotic theory for calculating deformations caused by dislocations buried in a spherical earth：geoid change[J]. Journal of Geodesy，2003，77(7/8)：381–387.
[14] 吴忠良. 地震断层面上的位错分布[J]. 地震学报，2004，(5)：489–494.(WU Zhongliang. Dislocation distribution on earthquake fault level[J]. Acta Seismologica Sinica，2004，(5)：489–494.(in Chinese))
[15] BANERJEE P，POLLITZ F F，BÜRGMANN R. The size and duration of the Sumatra-Andaman earthquake from far-field static offsets[J]. Science，2005，308(5729)：1 769–1 772.
[16] SOMERVILLE P，IRIKURA K，GRAVES R，et al. Characterizing crustal earthquake slip models for the prediction of strong ground motion[J]. Seismological Research Letters，1999，70(1)：59–80.
[17] 韩竹军，冉勇康，徐锡伟. 隐伏活断层未来地表破裂带宽度与位错量初步研究[J]. 地震地质，2002，(4)：484–494.(HAN Zhujun，RAN Yongkang，XU Xiwei. Preliminary study on the future surface rupture zone width and dislocation amount of hidden active fault[J]. Seismology and Geology，2002，(4)：484–494.(in Chinese))
[18] 李红，邓志辉，陈连旺，等. 走滑断层地震地表破裂带分布影响因素数值模拟研究——以1973年炉霍M_S7.6地震为例[J]. 地球物理学报，2019，62(8)：2 871–2 884.(LI Hong，DENG Zhihui，CHEN Lianwang，et al. Numerical simulation study on the influencing factors of the distribution of the surface rupture zone of strike-slip faults——Taking the 1973 Huhuo M_S7.6 earthquake as an example[J]. Chinese Journal of Geophysics，2019，62(8)：2 871–2 884.(in Chinese))
[19] 王爱国，石玉成，马巍. 地震地表变形三维有限元数值分析[J].岩石力学与工程学报，2004，23(24)：4 124–4 130.(WANG Aiguo，SHI Yucheng，MA Wei. Three-dimensional finite element numerical analysis of seismic surface deformation[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(24)：4 124–4 130.(in Chinese))
[20] 张永志，赵大江，王卫东. 断层走滑不均匀性对地面变形的影响[J].地球物理学报，2009，52(8)：2 113–2 118.(ZHANG Yongzhi，ZHAO Dajiang，WANG Weidong. The influence of fault strike-slip heterogeneity on ground deformation[J]. Journal of Geophysics，2009，52(8)：2 113–2 118.(in Chinese))
[21] AKI K，RICHARDS P G. Quantitative seismology：theory and methods[M]. [S. l.]：W. H. Freeman，1980.
[22] HANKS T C，KANAMORI H. A moment magnitude scale. Journal of Geophysical Research[J]. Solid Earth，1979，84(B5)：2 348–2 350.
[23] WELLS D L，COPPERSMITH K J. New empirical relationships among magnitude，rupture length，rupture width，rupture area，and surface displacement[J]. Bulletin of the Seismological Society of America，1994，84(4)：974–1 002.
[24] WALD D J，HELMBERGER D V，HEATON T H . Rupture model of the 1989 Loma Prieta earthquake from the inversion of strong-motion and broadband teleseismic data[J]. Bulletin of the Ssmological Society of America，1991，81(5)：1 540–1 572.