摘要
1972年召开的地应力会议发表了一篇探讨地震破坏模式的论文:“一个平面剪切破坏前的应力场”。该文认为地震孕育过程晚期,断层填充物失去了抗剪能力。地壳构造运动使断层增长的剪切荷载都集中在闭锁段上。由此可导出临震前地应力分布特征:离震源稍远处总有一个主应力指向震源(即闭锁段)。
This paper deals with some characteristics of the stress field around the block-segments of faults immediately before strong shock waves take place.Analytic results show that the main additional stresses are all directed at the block-segments of faults with the exception of some narrow areas.This has been confirmed by data on the stresses measured a number of times immediately before some strong shocks.Thus,dangerous zones of strong earthquakes can be determined if precise measurements of ground stresses are available.
出处
《科学通报》
1979年第14期650-653,共4页
Chinese Science Bulletin
