关于“用单元降刚法探索中国大陆强震远距离跳迁及主体活动区域转移”的讨论——横向各向同性“杀伤单元”才是更好的途径
|
摘要
《地球物理学报》第55卷第1期的"用单元降刚法探索中国大陆强震远距离跳迁及主体活动区域转移"一文提出用减小剪切模量的方法模拟地震断层错动的效应,这种处理虽然可以模拟压扭性走滑断层错动时的剪应力降低,但会导致垂直于断层的正应力也剧烈变化,因此这种简单的减小弹性模量的方法并不合理.本文探讨了一种更好的方法——横向各向同性"杀伤单元",利用该方法模拟断层滑动效应得到了较为合理的结果,与Okada解析解吻合较好,能够正确反映断层滑动时的应力变化.
In a paper titled "The mechanism of long-distance jumping and the migration of main active areas for strong earthquakes occurred in the Chinese continent" (Vol.55, No.1 of Chinese J. Geophys. (Chinese Edition)), Yang et al. proposed to simulate the effects of earthquake fault slip by reducing shear modulus of the elements in calculation. Although this method can simulate the shear stress drop of a fault under compression and shear, it will produce a significant drop of normal stress on the fault which is incorrect. In this paper, we propose a better method—transverse isotropic "wounded element", and get a reasonable result, which is in good agreement with analytic solutions in the stress calculation as a result of fault slip.
In a paper titled "The mechanism of long-distance jumping and the migration of main active areas for strong earthquakes occurred in the Chinese continent" (Vol.55, No.1 of Chinese J. Geophys. (Chinese Edition)), Yang et al. proposed to simulate the effects of earthquake fault slip by reducing shear modulus of the elements in calculation. Although this method can simulate the shear stress drop of a fault under compression and shear, it will produce a significant drop of normal stress on the fault which is incorrect. In this paper, we propose a better method—transverse isotropic "wounded element", and get a reasonable result, which is in good agreement with analytic solutions in the stress calculation as a result of fault slip.
引文
[1]杨树新,陆远忠,陈连旺等.用单元降刚法探索中国大陆强震远距离跳迁及主体活动区域转移.地球物理学报,2012,55(1):105-116.Yang S X,Lu Y Z,Chen L W,et al.The mechanism oflong-distance jumping and the migration of main active areasfor strong earthquakes occurred in the Chinese continent.Chinese J.Geophys.(in Chinese),2012,55(1):105-116.
[2]阎波,方云.基于ANSYS的边坡开挖模拟.山西建筑,2008,34(1):93-94.Yan B,Fang Y.Simulation of slope excavation based uponANSYS.Shanxi Architecture(in Chinese),2008,34(1):93-94.
[3]谢海国,章广成,杨昌斌.边坡分级开挖过程的动态模拟.土工基础,2007,21(3):54-56.Xie H G,Zhang G C,Yang C B.Achievement of dynamicsimulation of excavation of slope in a hydropower station.Soil Eng.and Foundation(in Chinese),2007,21(3):54-56.
[4]Lu Y,Yang S,Chen L,et al.Mechanism of the spatialdistribution and migration of the strong earthquakes in Chinainferred from numerical simulation.Journal of Asian EarthSciences,2011,40(4):990-1001.
[5]陆远忠,叶金铎,蒋淳等.中国强震前兆地震活动图像机理的三维数值模拟研究.地球物理学报,2007,50(2):499-508.Lu Y Z,Ye J D,Jiang C,et al.3Dnumerial simulation onthe mechanism or precursory seismicity pattern before strongearthquake in China.Chinese J.Geophys.(in Chinese),2007,50(2):499-508.
[6]Lakes R S.Foam structures with a negative Poisson′s ratio.Science,1987,235(4792):1038-1040.
[7]Slawinski M A.Waves and Rays in Elastic Continua:2nd Ed.World Scientific,2007.
[8]Okada Y.Surface deformation due to shear and tensile faults in a half-space.Bulletin of the Seismological Society of America,1985,75(4):1135-1154.
[9]Wang R,Martin F L,Roth F.Computation of deformation induced by earthquakes in a multi-layered elastic crust-FORTRAN programs EDGRN/EDCMP.Computers&Geosciences,2002,29(2):195-207.
[2]阎波,方云.基于ANSYS的边坡开挖模拟.山西建筑,2008,34(1):93-94.Yan B,Fang Y.Simulation of slope excavation based uponANSYS.Shanxi Architecture(in Chinese),2008,34(1):93-94.
[3]谢海国,章广成,杨昌斌.边坡分级开挖过程的动态模拟.土工基础,2007,21(3):54-56.Xie H G,Zhang G C,Yang C B.Achievement of dynamicsimulation of excavation of slope in a hydropower station.Soil Eng.and Foundation(in Chinese),2007,21(3):54-56.
[4]Lu Y,Yang S,Chen L,et al.Mechanism of the spatialdistribution and migration of the strong earthquakes in Chinainferred from numerical simulation.Journal of Asian EarthSciences,2011,40(4):990-1001.
[5]陆远忠,叶金铎,蒋淳等.中国强震前兆地震活动图像机理的三维数值模拟研究.地球物理学报,2007,50(2):499-508.Lu Y Z,Ye J D,Jiang C,et al.3Dnumerial simulation onthe mechanism or precursory seismicity pattern before strongearthquake in China.Chinese J.Geophys.(in Chinese),2007,50(2):499-508.
[6]Lakes R S.Foam structures with a negative Poisson′s ratio.Science,1987,235(4792):1038-1040.
[7]Slawinski M A.Waves and Rays in Elastic Continua:2nd Ed.World Scientific,2007.
[8]Okada Y.Surface deformation due to shear and tensile faults in a half-space.Bulletin of the Seismological Society of America,1985,75(4):1135-1154.
[9]Wang R,Martin F L,Roth F.Computation of deformation induced by earthquakes in a multi-layered elastic crust-FORTRAN programs EDGRN/EDCMP.Computers&Geosciences,2002,29(2):195-207.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心