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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 Mode and Ultimate Strength of Precast Concrete Barrier
Author(s): Se-Jin Jeon, Myoung-Sung Choi, and Young-Jin Kim
Publication: Structural Journal
Appears on pages(s): 99-107
Keywords: guardrail; precast concrete barrier; railing; ultimate strength; yield line theory
Abstract:A new type of precast concrete barrier system was developed and a full-scale static test was performed. An efficient method was devised to combine the barrier and deck by using protruded reinforcements and a mortar filling. Five specimens were fabricated with different test variables that simulate the cantilevered part of the deck and a series of precast barriers. Test levels and the corresponding loading patterns simulating a vehicle crash were adopted from AASHTO LRFD specifications. The developed precast barriers attained an ultimate capacity equivalent to that of a conventional cast-in-place barrier. The cracking patterns were analyzed in terms of the yield line theory presented in AASHTO LRFD specifications. An alternative failure mode and corresponding predictive equations were proposed for the ultimate strength by reflecting characteristics of the barrier shape. The longitudinal discontinuity of precast barrier segments was also addressed by accounting for the crashing location and possible failure modes.
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