 |
 |
Recent Issues |
Volume 13, 4 issues
Volume 13
Issue 4, 421–605
Issue 3, 247–419
Issue 2, 141–246
Issue 1, 1–139
Volume 12, 5 issues
Volume 12
Issue 5, 563–722
Issue 4, 353–561
Issue 3, 249–351
Issue 2, 147–247
Issue 1, 1–146
Volume 11, 5 issues
Volume 11
Issue 5, 491–617
Issue 4, 329–490
Issue 3, 197–327
Issue 2, 91–196
Issue 1, 1–90
Volume 10, 5 issues
Volume 10
Issue 5, 537–630
Issue 4, 447–535
Issue 3, 207–445
Issue 2, 105–206
Issue 1, 1–103
Volume 9, 5 issues
Volume 9
Issue 5, 465–574
Issue 4, 365–463
Issue 3, 259–363
Issue 2, 121–258
Issue 1, 1–119
Volume 8, 8 issues
Volume 8
Issue 8-10, 385–523
Issue 5-7, 247–384
Issue 2-4, 109–246
Issue 1, 1–107
Volume 7, 10 issues
Volume 7
Issue 10, 887–1007
Issue 8-9, 735–885
Issue 7, 613–734
Issue 6, 509–611
Issue 5, 413–507
Issue 4, 309–412
Issue 3, 225–307
Issue 2, 119–224
Issue 1, 1–117
Volume 6, 9 issues
Volume 6
Issue 9-10, 1197–1327
Issue 7-8, 949–1195
Issue 6, 791–948
Issue 5, 641–790
Issue 1-4, 1–639
Volume 5, 6 issues
Volume 5
Issue 6, 855–1035
Issue 5, 693–854
Issue 4, 529–692
Issue 3, 369–528
Issue 2, 185–367
Issue 1, 1–183
Volume 4, 10 issues
Volume 4
Issue 10, 1657–1799
Issue 9, 1505–1656
Issue 7-8, 1185–1503
Issue 6, 987–1184
Issue 5, 779–986
Issue 4, 629–778
Issue 3, 441–627
Issue 2, 187–440
Issue 1, 1–186
Volume 3, 10 issues
Volume 3
Issue 10, 1809–1992
Issue 9, 1605–1807
Issue 8, 1403–1604
Issue 7, 1187–1401
Issue 6, 1033–1185
Issue 5, 809–1031
Issue 4, 591–807
Issue 3, 391–589
Issue 2, 195–389
Issue 1, 1–193
Volume 2, 10 issues
Volume 2
Issue 10, 1853–2066
Issue 9, 1657–1852
Issue 8, 1395–1656
Issue 7, 1205–1394
Issue 6, 997–1203
Issue 5, 793–996
Issue 4, 595–791
Issue 3, 399–594
Issue 2, 201–398
Issue 1, 1–200
Volume 1, 8 issues
Volume 1
Issue 8, 1301–1500
Issue 7, 1097–1299
Issue 6, 957–1095
Issue 5, 837–956
Issue 4, 605–812
Issue 3, 407–604
Issue 2, 205–406
Issue 1, 3–200
|
|
 |
 |
|
Abstract
|
A compressive echelon fault structure is modeled using an explicit finite difference
code (FLAC). The Weibull distribution is used to reflect the heterogeneity of
elemental parameters. The released elastic strain energies due to shear and tensile
failures are calculated using FISH functions. We examine the failed zone propagation
process and the temporal and spatial distribution of the released strain energy,
emphasizing those during the jog intersection.
A specimen including two parallel faults with an overlap is divided into square
elements. Rock and faults are considered as nonhomogeneous materials with
uncorrelated mechanical parameters (elastic modulus, tensile strength and cohesion).
A Mohr–Coulomb criterion with tension cut-off and a post-peak brittle law are used.
During the jog intersection, high values of released
tensile strain energy are found at
wing failure zones and at fault tips, while high values of released
shear strain energy
are found at faults. Despite the jog intersection, the released strain energy in the jog
is not high.
We also introduce a quantity
describing the slope of the curve connecting the number of failed
elements and the energy released. This is similar to the quantity
found in the literature, but is expressed in units of
J. Before
the jog intersection, some anomalies associated with shear sliding of rock blocks along
faults can be observed from the number of failed elements (in shear, in tension and in
either), the accumulated released strain energy due to shear and tensile
failures, the strain energy release rates in shear and in tension, and the value of
. As deformation
proceeds, the evolution of
is calculated according to two kinds of the released energy: total energy due to shear
and tensile failures and shear strain energy. The two exhibit similar behavior,
suggesting that the released strain energy in shear is much higher than in
tension.
|
Keywords
compressive echelon fault structure, jog intersection,
failed zone, released strain energy, heterogeneity, shear
failure
|
Milestones
Received: 22 July 2010
Revised: 13 October 2010
Accepted: 14 October 2010
Published: 1 January 2011
|
|