Journal
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
Volume 108, Issue B2, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2000JB000123
Keywords
unified constitutive formulation; constitutive scaling law; inhomogeneous fault surfaces; characteristic length scale; physical scaling relation
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[1] It is widely recognized that some of the physical quantities inherent in a rupture are scale- dependent, and the scale dependence is one of the most notable facts and features of rupture phenomena. The paper addresses how such scale- dependent shear rupture of a broad range from laboratory- scale frictional slip failure and shear fracture of intact rock to field- scale rupture as an earthquake source can be unified by a single constitutive law. Noting that the earthquake rupture is a mixed process between frictional slip failure and the shear fracture of intact rock, it is concluded that the constitutive law for the earthquake rupture be formulated as a unifying law that governs both frictional slip failure and shear fracture of intact rock. It is demonstrated that the slip- dependent constitutive law is such a unifying law, and a constitutive scaling law is derived from laboratory data on both frictional slip failure and shear fracture of intact rock. This constitutive scaling law enables one to provide a consistent and unified comprehension for scale- dependent physical quantities inherent in the rupture, over a broad range from small- scale frictional slip failure and shear fracture in the laboratory to large- scale earthquake rupture in the field.
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