Equivalent-bodyforce approach on modeling elastic dislocation problem using finite element method
文献类型：期刊论文
| 作者 | Zhang Bei; Zhang Huai; Shi Yao-Lin |
| 刊名 | Chinese journal of geophysics-chinese edition
 |
| 出版日期 | 2015-05-01 |
| 卷号 | 58期号:5页码:1666-1674 |
| 关键词 | Discontinuous finite element method Earthquake dislocation theory Co-seismic coulomb failure stress change Tohoku-oki earthquake North china |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg20150518 |
| 通讯作者 | Shi yao-lin(shiyl@gucas.ac.cn) |
| 英文摘要 | Dislocation theory is well applied to calculate coseismic and postseismic effects. a key signature of the theory is that the solution of displacement is discontinuous. various numerical methods can handle such discontinuous problems using a mesh which includes the discontinuous plane explicitly. however, generating such a mesh could be challenging and time consuming. we introduce an equivalent-bodyforce approach to handle discoritinuities appearing in elastic dislocation theory. this approach gets rid of meshing the fault plane explicitly and simplifies the fem modeling process. based on burridge and knopoff's work, we deduced a close-formed formula representing equivalent-bodyforce in fem framework, and then compared our numerical results with okada's analytical solution in a test case in order to check the correctness of our formula and codes. at last, the 2011 m(w)9. 0 tohoku-oki earthquake was studied. we compared our numerical results with gps observations to check the correctness of our formula and codes again, and discussed the co-seismic effects in north china of this earthquake. in the test case, our numerical results differ from okada's analytical solution by less than 3% in most computing regions. in modelling co-seismic effects of the 2011 m(w)9. 0 tohoku-oki earthquake, our numerical results of displacement field agree well with gps observations in both direction and magnitude. the co-seismic stress changes in north china are in east-west tension with a magnitude about 1 kpa. the north-south compression is one order of magnitude smaller. the coulomb failure stress changes on active faults in north china are negative which indicates more stable, except at the north end of the tanlu fault zone where the coulomb failure stress changes are about 100 pa. equivalent-bodyforce approach is applicable and accurate in fem modeling. the 2011 m(w)9. 0 tohoku-oki earthquake makes faults in north china more stable except the north end of the tanlu fault zone. |
| WOS关键词 | TOHOKU-OKI EARTHQUAKE ; PACIFIC COAST ; DISCONTINUITIES ; DEFORMATION ; SPACE |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000355639800018 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2376662 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Shi Yao-Lin |
| 作者单位 | Chinese Acad Sci, Univ Chinese Acad Sci, Key Lab Computat Geodynam, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Bei,Zhang Huai,Shi Yao-Lin. Equivalent-bodyforce approach on modeling elastic dislocation problem using finite element method[J]. Chinese journal of geophysics-chinese edition,2015,58(5):1666-1674. |
| APA | Zhang Bei,Zhang Huai,&Shi Yao-Lin.(2015).Equivalent-bodyforce approach on modeling elastic dislocation problem using finite element method.Chinese journal of geophysics-chinese edition,58(5),1666-1674. |
| MLA | Zhang Bei,et al."Equivalent-bodyforce approach on modeling elastic dislocation problem using finite element method".Chinese journal of geophysics-chinese edition 58.5(2015):1666-1674. |
入库方式： iSwitch采集
来源：中国科学院大学
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。