摘要
含穿透裂纹的脆性材料在受到轴压时,裂纹发生拐折破裂,这已被众多的实验所证实。本文根据这一实验事实,对地震观测中发现的现象进行了分析,表明平直断层模式对一些问题不能作出很好的解释,因而提出了拐折破裂模式。对拐折破裂模式进行了理论分析和数值计算,得到了各种参数条件下的理论地震图。结果表明:拐折震源模型可以改进平直断层震源模型的某些不足。
It has been justified by numerous experiments that a specimen of brittle material with a inclined penetrating crack under axial compression, the crack grows in the direction oblique to the original crack. Analyzing some earthquakes,we have found that the plane-fault seismic source model ca't explain some phenomena. Based on the experimental results and field data,a kinking-fracture non-planar source model has been developed in this paper. Using this model we have conducted theoretical analysis and numerical calculating and got the synthetic seismograph and its spectrum with different parameters. The results show that the non-planar model is better than the plane one in some aspects.
出处
《中国地震》
CSCD
北大核心
1989年第3期80-88,共9页
Earthquake Research in China
基金
地震科学联合基金会资助
