台湾地震对华南及华东地区应力场影响的数值模拟研究

Numerical simulation study on the influence of Taiwan Earthquake on stress field of South China and East China

利用有限元方法,研究了台湾地震发生所产生的应力变化对华东南地区应力场调整的影响,给出了这些地区地震发生后所产生的扰动应力场分布特征,解释了台湾地震活动与大陆地震活动同步的问题。研究结果认为,台湾东部地震带地震发生所产生的应力扰动主要影响福建至广东和广西沿海地区的应力场;如果地震发生在台湾东南角,其扰动应力会影响到华东沿海地区;台湾北部地震带地震发生所产生的扰动应力场除影响福建至广东沿海外,还会影响到华东沿海地区。

This paper studies the influence of changeable stress brought by Taiwan earthquake on the stress field adjustment in Southeast China by means of finite element, shows the distribution characteristics of disturbance stress field brought by the above earthquakes, and explains the synchronism of seismic activity in Taiwan and in mainland. It is proposed that the distrurbance brought by earthquakes occurred along East Taiwan earthquake belt mainly affects stress field stretching from Fujian Province to coastal Guangdong Province and Guangxi Province. But if earthquake occurs in southeast corner of Taiwan, its disturbance stress will also affect coastal East China. The disturbance stress field brought by earthquakes occurring along North Taiwan earthquake belt will affect coastal East China in addition to the area stretching from Fujian Province to coastal Guangdong Province.