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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Failure Paths and Safety Factors for Multiaxial Stress in Concrete
Author(s): Harald Kreuzer and Karl Bury
Publication: Structural Journal
Appears on pages(s): 639-645
Keywords: concrete dams; evaluation; failure; failure mechanisms; mass concrete; Mohr circle; safety; safety factor; strength; stress analysis; stresses; Structural Research
Abstract:Although mass concrete structures, such as dams, are governed by multiaxial stress patterns, their safety is commonly evaluated in terms of a uniaxil safety measure. To assess such a structure's safety more realistically, a multiaxial failure criterion and a relevant stress path to failure could be chosen in a reformulation of the safety measure. This paper compares the Mohr failure envelope with the principal stress failure envelope in terms of feasible paths, and their effects on the safety factor for a medium-strength concrete. Different values of the commonly defined safety factor are shown to be obtained for identical states of stress because of different assumptions for the initial stress state. To evaluate the safety of existing structures, the most likely failure path should be considered, and a distinction made between new and existing structures in the assumption of the initial state of stress.
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