Advanced Search
ZHANG ZHI-LIup, LI QIN-ZUup2, GU JI-CHENGup, JIN YA-MINup2, YANG MAO-YUANup3, LIU WAN-QINupers a. 1980: THE FRACTURE PROCESSES OF THE TANGSHAN EARTHQUAKE AND ITS MECHANICAL ANALYSIS. Acta Seismologica Sinica, 2(2): 111-129.
Citation: ZHANG ZHI-LIup, LI QIN-ZUup2, GU JI-CHENGup, JIN YA-MINup2, YANG MAO-YUANup3, LIU WAN-QINupers a. 1980: THE FRACTURE PROCESSES OF THE TANGSHAN EARTHQUAKE AND ITS MECHANICAL ANALYSIS. Acta Seismologica Sinica, 2(2): 111-129.
shu

THE FRACTURE PROCESSES OF THE TANGSHAN EARTHQUAKE AND ITS MECHANICAL ANALYSIS

More Information
  • Published Date: August 31, 2011
    Graphical Abstract
    • Abstract
  • Fault-plane solutions of the mainshock and 17 large aftershocks are computed on the DJS-6 computer from the data of the first motions of P waves. Based on the model of finite moving source, the fracture processes and the source parameters of the mainshock and three largest aftershocks are estimated. The Mainshock occurred on a nearly vertical right-lateral strike-slip fault, striking N30°E, with an asymmetric bilateral fracture which propagated 70 km northeastward and 45 km southwestward with an average velocity of 2.7 km/sec. Source parameters of the mainshock such as the average dislocation, seismic moment and stress-drop are estimated to be 136 cm, 1.24×1027 dyne, cm and 12 bars respectively.Most of the aftershocks with ML>5.0 occurred near the main fault plane and along the fracture branches at both of its ends. These fracture branches are located in the dilatational quarters and make about 80 angles with the mam fault plane. On the two fracture branches, most of the major aftershocks are concentrated. A mechanical analysis of this phenomenon of fracture propagation is attempted in this paper.It is shown that for complex deformations, the fracture propagation no longer takes place along the original plane for brittle materials but deviates from it by a certain angle. The mechanical model used to calculate this deviation angle of fault yields results which agree essentially with the observation.Based on the above results, it can be inferred that the characteristics and mechanical conditions of the Tangshan earthquake as well as those of the Haicheng earthquake are quite different from those of the earthquakes occurring on some great faults which may be explained by stick-slip mechanisms. These two earthquakes are not only caused by the horizontal stress fields but also by local vertical forces induced from the movement of the underground materials. It is also worthy of note that Tangshan earthquake is different from Haicheng earthquake in that it occurs in a relatively homogeneous and brittle medium and therefore no foreshocks took place before the mainshock.
    • FullText(HTML)
    • References (1)
  • [1] L. Knopoff, Analytical calculation of the fault—plane problem, publ. Domin. Obs, 24, 309—315, 1961.

    [2] A. , J. Wickens and J. H. Hodgson, Computer re—evaluation of earthquake mechanism, Publ.Domin. Obs. 33, 1, 1—10, 1967.

    [3] Hoang—Trong Pho, Extended distances and angles of incidence of P waves, Bull. Seism. Soc. Am., 62, 4, 885—902, 1972.

    [4] A. Ben—Menahem, Radiation of seismic surface wave from finite moving sources, Bull. Seis. Soc Am., 51, 401, 1961.

    [5] N. A. Haskell, Total energy and energy spectral density of elastic wave radiation from pro—pagation faults, Bull. Seism. Soc. Am., 54, 6, 1811—1841, 1964.

    [6] T. Hirasawa and W. Stauder, On the seismic body wave from a finite moving source, Bull Seism. Soc. Am., 55, 237—262, 1965.

    [7] J. C. Savage, Relation of corner frequency to fault dimensions, J. Geophys. Res., 77, 20, 3788——3795, 1972.

    [8] T. C. Hanks and M. Wyss, The use of body wave spectra in the determination of seismic source parameters, Bull. Seis. Soc. Am., 62, 561—589, 1972.

    [9] H. Berekhemer and K. H. Jacob, Investigation of the dymayical process in earthquake foci by analyzing the pulse shape of body wave, AD—738953, 1968

    [10] 中国科学院地球物理研究所, 地震仪器概论, 科学出版社, 90—104, 1975.

    [11] 虢顺民等, 唐山地震区域构造背景和发震模式的讨论, 地质科学, 4, 305—320, 1977.

    [12] J. N. Brune, Toctonic stress and the spectra of seismic shear wave from earthquakes. J. Geophys. Res., 75, 26, 4997—5009, 1970.

    [13] M. A. Chinnery, Theoretical fault models, Publ. Domin. Obs., 37, 7, 221—223, 1969.

    [14] G. S. Stewart, R. Butler, and H. Kanamori, Surface and body wave analysis for the Feb. 4, 1975 Haicheng and July 27, 1976 Tangshan Chinese earthquakes (abstract) EOS, Trans. Amer. Geophys. Union, 57, 12, 953, 1976.

    [15] 陈运泰等, 巧家、石棉的小震震掠参数的侧定及其地震危险性的估计, 地球物理学报, 19, 3, 206—231, 1976.

    [16] G. C. Sih and H. Liebowitz, Mathematical theories of brittle fracture, Fracture, 11, 68—188, 1968.

    [17] G, C. Sih, Mechanics of fracture 1, Methods of analysis and solutions of crack problems, 1973.

    [18] О.Г.Шамина, А.А0Павлв, Ю.ф.Копничев, Исследование Процесса подговки Грешены, Изв.АН.СССР.фчз.Зем., 8, 17—30, 1973.

    [19] E. Hoek and Z. T. Bieniawski, Brittle fracture propagation in rock under compression. International J. of Fracture Mech., 3, 137—155, 1965.

    [20] 傅承义, 地球十讲, 科学出版社, 1976.

    [21] 郭增建等, 震源孕育模式的初步讨论, 地球物理学报, 16, 43—48, 1973.
    • Related Articles

  • Related Articles

    Xie Zhangdi, Yu Xiangwei, Zhang Wenbo. 2025: Dynamic source rupture process of the 2022 Menyuan MW6.6 earthquake，Qinghai Province. Acta Seismologica Sinica, 47(1): 21-36. DOI: 10.11939/jass.20230144
    Zhang Kaizhi, Wan Yongge. 2024: Inversion of rupture process of the Japan MW7.6 earthquake on January 1，2024. Acta Seismologica Sinica: 1-18. DOI: 10.11939/jass.20240055
    Yang Ya qiong, Wang Xiao shan, Wan Yong ge, Sheng Shu zhong, Chen Ting. 2016: Seismogenic fault segmentation of Tangshan earthquake sequence derived from focal mechanism solutions. Acta Seismologica Sinica, 38(4): 632-644.
    Hu Caibo, Cai Yongen. 2016: A possible mechanism of Omori-Utsu’s law through an example of the great Tangshan earthquake. Acta Seismologica Sinica, 38(4): 580-589.
    Zhang Yong, Xu Lisheng, Chen Yun-tai, Wang Rongjiang. 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. Acta Seismologica Sinica, 36(2): 159-164. DOI: 10.3969/j.issn.0253-3782.2014.02.001
    Zhang Lifen, Yao Yunsheng. 2013: Review on numerical simulation of dynamic rupture process of earthquake source. Acta Seismologica Sinica, 35(4): 604-615. DOI: 10.3969/j.issn.0253-3782.2013.04.014
    Chen Yun-Tai, Yang Zhixian, Zhang Yong, Liu Chao. 2013: A brief talk on the 20 April 2013 Lushan MW6.7 earthquake. Acta Seismologica Sinica, 35(3): 285-295. DOI: 10.3969/j.issn.0253-3782.2013.03.001
    Zhang Zhili, Wang Chengbao, Fang Xing, Yan Hongcom sh. 1989: AN ECHELON FRACTURE MODEL FOR THE TANGSHAN EARTHQUAKE SEQUENCE AS WELL AS SIMULATION IN THEORY AND EXPERIMENT. Acta Seismologica Sinica, 11(3): 291-302.
    ZHANG ZHILI, FANG XING. 1988: A NEW METHOD TO STUDY EARTHQUAKE FRACTURE PROCESS AND ITS APPLICATIONS. Acta Seismologica Sinica, 10(1): 1-10.
    1984: THREE DIMENSIONAL ANALYSIS OF FRACTURE PROCESS OF THE 1976 TANGSHAN EARTHQUAKE. Acta Seismologica Sinica, 6(1): 22-28.

Catalog

    Get Citation
    PDF
    XML
    Article views (1772) PDF downloads (135) Cited by()
    Turn off MathJax
    Article Contents
    Abstract
    References
    Related Articles

    Supported by: Beijing Renhe Information Technology Co., Ltd.   

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return