| DOI: | 10.1002/2015GL064281
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| 论文题名: | Barrier-induced supershear ruptures on a slip-weakening fault |
| 作者: | Weng H.; Huang J.; Yang H.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8666
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| EISSN: | 1944-8397
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| 出版年: | 2015
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| 卷: | 42, 期:12 | | 起始页码: | 4824
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| 结束页码: | 4832
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| 语种: | 英语
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| 英文关键词: | barrier
; supershear
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| Scopus关键词: | Earth sciences
; Geophysics
; Barrier
; Effective normal stress
; Lower boundary
; Numerical experiments
; Subshear speed
; Supershear
; Supershear rupture
; Upper boundary
; Seismographs
; barrier (equipment)
; coseismic process
; fault
; fracture propagation
; numerical model
; rupture
; shear stress
; size effect
; slip
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| 英文摘要: | Here we investigate the effects of a patch with elevated effective normal stress (barrier) on two-dimensional in-plane supershear rupture propagation on a planar fault from numerical experiments. Our results confirm that the barrier may slow down or stop coseismic ruptures but may also induce supershear ruptures. We demonstrate that the supershear rupture may emerge in a region that is delineated by two approximate linear boundaries. If the barrier size is below the lower boundary, ruptures can overcome the barrier and propagate at subshear speeds. If the barrier size is larger than the upper boundary, ruptures are always stopped by the barrier. Furthermore, we find that the barrier-induced supershear ruptures may eventually slow down into subshear speed, depending on the size and the location of the barrier. The duration of supershear ruptures increases as the barrier sizes grow from the lower to the upper boundary, which are proportional to the reduction in rupture speeds caused by the barrier. These results indicate that a barrier on the fault may not stop coseismic ruptures. Rather, the barrier may induce ruptures propagating at supershear speeds that play important roles in near-field ground shaking and damage. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84948716139&doi=10.1002%2f2015GL064281&partnerID=40&md5=be2c14c05353b4e388ae2cd6efc53e3c
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8282
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China
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| Recommended Citation: | |
Weng H.,Huang J.,Yang H.. Barrier-induced supershear ruptures on a slip-weakening fault[J]. Geophysical Research Letters,2015-01-01,42(12).
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