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本文用平面应变弹塑性的有限元方法,在前人研究的基础上,对中国大陆及邻区选用30条左右主要断裂,采用降低摩擦系数,保留断层错距(考虑地震之间相互影响又作一些改正)等方法,进一步计算得到中国及邻区现代构造应力场及其图象,并针对华北及西南(川滇)地区强震的相关性作一些探讨。为此,在华北及西南两区选用四对即八个强震序列,进行强震迁移关系的研究。计算结果表明:(1)我国及邻区构造应力场的演变及强震活动受到以印度板块为主的印度、太平洋、菲律宾三大板块联合作用的结果。(2)华北与西南或其它地区强震迁移是有联系又是及其复杂的。表现在华北及西南地区强震迁移是有联系,但不是随时间相对应。(3)初步给出我国可能发生地震断裂危险的地区或地段。
In this paper, based on the previous studies, based on the previous studies, about 30 main faults are selected in the Chinese mainland and adjacent areas. The friction coefficient is reduced and the fault dislocations are preserved (considering the interaction between earthquakes Some corrections) and other methods to further calculate the modern tectonic stress field and its image in China and its neighboring regions. Some discussions are made on the correlation between strong earthquakes in North China and Southwest China (Sichuan and Yunnan Provinces). Therefore, four or eight strong earthquakes sequences were selected in North China and Southwest China to study the relationship between strong earthquakes and their migration. The calculation results show that: (1) The tectonic stress field evolution and strong earthquakes in China and its adjacent areas are the result of the combined action of the three major plates of India, the Pacific Ocean and the Philippines dominated by the Indian plate. (2) The migration of strong earthquakes in North China, Southwest China and other regions is related and complex. There is a correlation between the strong earthquakes in North China and Southwest China, but not in time. (3) Give a preliminary analysis of the areas or locations in our country where earthquake breaks may occur.