東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Role of geometric complexities and o...

Bhat, Harsha Suresh.

Linked to FindBook

Google Book

Amazon

博客來

Role of geometric complexities and off-fault damage in dynamic rupture propagation.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Role of geometric complexities and off-fault damage in dynamic rupture propagation./
Author:	Bhat, Harsha Suresh.
Description:	246 p.
Notes:	Adviser: James R. Rice.
Contained By:	Dissertation Abstracts International68-05B.
Subject:	Applied Mechanics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3265157
ISBN:	9780549023166

Role of geometric complexities and off-fault damage in dynamic rupture propagation.
Bhat, Harsha Suresh.

Role of geometric complexities and off-fault damage in dynamic rupture propagation. - 246 p.

Adviser: James R. Rice.

Thesis (Ph.D.)--Harvard University, 2007.

To analyze the effect of fault branches on dynamic rupture propagation we numerically simulated the observed dynamic slip transfer from the Denali to Totschunda faults during the Mw 7.9, November 3, 2002, Denali fault earthquake, Alaska and show that the theory and methodology of Poliakov et al. [2002] and Kame et al. [2003] is valid for the 2002 Denali fault event. To understand the effect of fault branch length on dynamic rupture propagation we analyze earthquake ruptures propagating along a straight "main" fault and encountering a finite-length branch fault. We show finite branches have the tendency of stopping or re-nucleating rupture on the main fault depending on their length in addition to the parameters singled out by Kame et al. [2003]. We also illustrate branch-related complexities in rupture velocity and slip evolution. We illustrate the effect of backward branches (branches at obtuse angle to the main fault with the same sense of slip as the main fault) and propose a mechanism of backward branching. As a field example we simulate numerically, using a two-dimensional elastodynamic boundary integral equation formulation incorporating slip-weakening rupture, the backward branching phenomenon observed during the Landers 1992 earthquake.

ISBN: 9780549023166Subjects--Topical Terms:

1018410
Applied Mechanics.

Role of geometric complexities and off-fault damage in dynamic rupture propagation.
LDR:03507nam 2200289 a 45 001 940425
005 20110518
008 110518s2007 ||||||||||||||||| ||eng d
020 $a 9780549023166
035 $a (UMI)AAI3265157
035 $a AAI3265157
040 $a UMI $c UMI
100 1 $a Bhat, Harsha Suresh. $3 1264553
245 1 0 $a Role of geometric complexities and off-fault damage in dynamic rupture propagation.
300 $a 246 p.
500 $a Adviser: James R. Rice.
500 $a Source: Dissertation Abstracts International, Volume: 68-05, Section: B, page: 3136.
502 $a Thesis (Ph.D.)--Harvard University, 2007.
520 $a To analyze the effect of fault branches on dynamic rupture propagation we numerically simulated the observed dynamic slip transfer from the Denali to Totschunda faults during the Mw 7.9, November 3, 2002, Denali fault earthquake, Alaska and show that the theory and methodology of Poliakov et al. [2002] and Kame et al. [2003] is valid for the 2002 Denali fault event. To understand the effect of fault branch length on dynamic rupture propagation we analyze earthquake ruptures propagating along a straight "main" fault and encountering a finite-length branch fault. We show finite branches have the tendency of stopping or re-nucleating rupture on the main fault depending on their length in addition to the parameters singled out by Kame et al. [2003]. We also illustrate branch-related complexities in rupture velocity and slip evolution. We illustrate the effect of backward branches (branches at obtuse angle to the main fault with the same sense of slip as the main fault) and propose a mechanism of backward branching. As a field example we simulate numerically, using a two-dimensional elastodynamic boundary integral equation formulation incorporating slip-weakening rupture, the backward branching phenomenon observed during the Landers 1992 earthquake.
520 $a To characterize the effect of supershear ruptures on off-fault materials we extend a model of a two-dimensional self-healing slip pulse, propagating dynamically in steady-state with slip-weakening failure criterion, to the supershear regime and show that there exists a non-attenuating stress field behind the Mach front which radiates high stresses arbitrarily far from the fault (practically this would be limited to distances comparable to the depth of the seismogenic zone). We apply this model to study damage features induced during the 2001 Kokoxili (Kunlun) event in Tibet. We also study the 3D effects of supershear ruptures by simulating bilateral ruptures on a finite-width vertical strike-slip fault breaking the surface of an elastic half-space, and focus on the wavefield in the near-source region. We provide numerical evidence for the existence of Rayleigh Mach fronts, in addition to shear Mach fronts. We conclude that radiating Mach waves of three-dimensional supershear ruptures do transmit large-amplitude ground motions and stresses far from the fault. The amplitudes along the shear Mach front would be moderated at distances greater than the fault width by decay with distance due to geometrical spreading. However, in an ideally elastic material, we do not expect any geometrical attenuation along the Rayleigh Mach front.
590 $a School code: 0084.
650 4 $a Applied Mechanics. $3 1018410
650 4 $a Geophysics. $3 535228
690 $a 0346
690 $a 0373
710 2 $a Harvard University. $3 528741
773 0 $t Dissertation Abstracts International $g 68-05B.
790 $a 0084
790 1 0 $a Rice, James R., $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3265157