| 破裂速度和地震 |
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| 引用本文： | 姚孝新.破裂速度和地震[J].地球物理学报,1976,19(2):118-124. |
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| 作者姓名： | 姚孝新 |
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| 作者单位： | 中国科学院地球物理研究所 |
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| 摘 要： | 设计了一个二维脆性玻璃板的破裂模拟实验,以研究脆性介质的破裂传播过程。从实验中,发现破裂的传播有两种截然不同的方式,一种是破裂速度极缓慢的蠕裂,另一种是破裂速度极快的崩裂,它们之间相差7个数量级。 联系实验中的破裂现象和地震及崩塌现象,认为:在地震破裂过程中,尤其前、主震之间,很可能存在蠕裂过程;在大规模崩塌之前,也可能存在蠕裂过程。
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| 关 键 词： | 破裂速度 天然地震 玻璃板 主震 微裂 破裂传播 前震 破裂过程 应力场 大地震 |
RUPTURE VELOCITY AND EARTHQUAKES |
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| YAO XIAO-XING.RUPTURE VELOCITY AND EARTHQUAKES[J].Chinese Journal of Geophysics,1976,19(2):118-124. |
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| Authors: | YAO XIAO-XING |
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| Institution: | Institute of Geophysics, Academia Sinica |
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| Abstract: | A simulation experiment using the fracturing of two-dimensional brittle glass plates is designed to study the propagation process of fracture in a brittle medium. From the experiment it is found that the propagation of fracture has two distinct modes. One can be named "creep fracture" which has an extremely low rupture velocity; whereas the other termed "burst fracture" of which the rupture velocity is high. The rupture velocity of the latter is greater than that of the former by the order 107.Eelating the fracturing phenomena in the laboratory to earthquakes and other natural dilapidation phenomena, and taking the local process of earthquakes as a fracture process, we come to the conclusions that the creep fracture may occur before a dilapidation on a large scale, and during the fracture process of earthquakes, particularly during the interval between the foreshocks and the mainshock. |
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