| A two－dimensional earthquake fault modeling with fractal structure strength distribution |
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| 引用本文： | 陈祥熊.A two－dimensional earthquake fault modeling with fractal structure strength distribution[J].地震学报(英文版),1996,9(4):593-603. |
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| 作者姓名： | 陈祥熊 |
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| 作者单位： | XIANG XIONG CHEN Seismological Bureau of Fujian Province，Fuzhou 350003，China |
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| 摘 要： | Ａｔｗｏ┐ｄｉｍｅｎｓｉｏｎａｌｅａｒｔｈｑｕａｋｅｆａｕｌｔｍｏｄｅｌｉｎｇｗｉｔｈｆｒａｃｔａｌｓｔｒｕｃｔｕｒｅｓｔｒｅｎｇｔｈｄｉｓｔｒｉｂｕｔｉｏｎＸＩＡＮＧ－ＸＩＯＮＧＣＨＥＮ（陈祥熊）ＳｅｉｓｍｏｌｏｇｉｃａｌＢｕｒｅａｕｏｆＦｕｊｉ...
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| 收稿时间： | 19 November 1994 |
| 修稿时间： | 25 April 1995 |
A two-dimensional earthquake fault modeling with fractal structure strength distribution |
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| XIANG XIONG CHEN Seismological Bureau of Fujian Province,Fuzhou ,China.A two-dimensional earthquake fault modeling with fractal structure strength distribution[J].Acta Seismologica Sinica(English Edition),1996,9(4):593-603. |
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| Authors: | XIANG XIONG CHEN Seismological Bureau of Fujian Province Fuzhou China |
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| Institution: | (1) Seismological Bureau of Fujian Province, 350003 Fuzhou, China |
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| Abstract: | In this paper a two dimensional (2 D) model of earthquake fault rupturing was presented. It was estabilished on the basis of 1 D spring block model. Using this model, we studied the dynamical plane strain fracture problem, modeled the whole dynamical process of nucleating, expanding and propagating of fracture on a 2 D fault with homogeneous or inhomogeneous rupture strength distribution. Our studies show that under homogeneous prestress condition, the fault will gain enough momentum to tear strong obstacles in their propagating path. The rupturing fronts can also propagate forth around the isolated barriers. It is shown that the stopping conditions for rupturing processes play an important role in modeling whole earthquake process. We also studied the dynamical rupturing problems of the fault on which the rupture strength distribution is inhomogeneous, and modeled the earthquake sequence generated on a 2 D fault with the strength distribution of fractal structure. It possesses some similar features as a seismic sequence in the nature. These features mainly depend on the distribution of rupture strength on the fault plane and the level of initial stress drop. The modeling studies which were established on the basis of experiments and observations provided the physical basis for explaining some statistical rules of seismicity. |
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| Keywords: | earthquake fault fracture strength fractal dynamical rupture process |
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