Numerical modelling of exciting seismic waves for a simplified bridge pier model under high-speed train passage over the viaduct
文献类型：期刊论文
| 作者 | Wang ZhiYang1,3; Li YouMing2,3; Bai WenLei1,3 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2020-12-01 |
| 卷号 | 63期号:12页码:4473-4484 |
| 关键词 | Bridge piers model Train source Numerical modelling Modified couple stress theory |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg2020O0156 |
| 英文摘要 | Most of the time, high-speed trains run on the viaducts, and when high-speed trains pass over the viaducts, the process of exciting seismic waves is not exactly the same as that of exciting seismic waves on the ground due to exciting seismic waves through bridge piers coupled with the ground. We explore the mechanism and process of excitation of seismic waves through bridge piers when high-speed trains passage over the viaducts. To simplify the analysis, we consider the high-speed train as a moving linear source along one direction, and the high-speed train exerts forces on bridge piers which insert into the ground at a depth of tens of meters, coupled with the topsoil and surrounding rock, through front and rear wheels of each car. After this analysis, the time function of high-speed-train source under high-speed train passage over the viaduct is derived. Meanwhile, we derive the elastic wave equation including the characteristic scale parameter, based on the modified couple stress theory in the frame of the generalized continuum mechanics, and apply this elastic wave equation, the time function of the high-speed-train source and the optimized staggered grid finite difference scheme in performing numerical modelling. By comparing and analyzing the synthetic seismograms with the field seismograms, the conclusions will provide a theoretical basis for further research of imaging and inversion based on train source. |
| WOS关键词 | COUPLE-STRESS THEORY ; SPACE SOIL MEDIUM ; DYNAMIC-RESPONSE ; INTERFEROMETRY ; ELASTICITY |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000595589000016 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/99853]  |
| 专题 | 地质与地球物理研究所_中国科学院油气资源研究重点实验室 |
| 通讯作者 | Li YouMing |
| 作者单位 | 1.Beijing Univ Chem Technol, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resource Res, Beijing 100029, Peoples R China 3.Joint Res Grp High Speed Rail Seismol, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang ZhiYang,Li YouMing,Bai WenLei. Numerical modelling of exciting seismic waves for a simplified bridge pier model under high-speed train passage over the viaduct[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2020,63(12):4473-4484. |
| APA | Wang ZhiYang,Li YouMing,&Bai WenLei.(2020).Numerical modelling of exciting seismic waves for a simplified bridge pier model under high-speed train passage over the viaduct.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(12),4473-4484. |
| MLA | Wang ZhiYang,et al."Numerical modelling of exciting seismic waves for a simplified bridge pier model under high-speed train passage over the viaduct".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.12(2020):4473-4484. |
入库方式： OAI收割
来源：地质与地球物理研究所
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