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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 and distribution of 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: Influence of Width-to-Effective Depth Ratio on Shear Strength of Reinforced Concrete Elements without Web Reinforcement
Author(s): Antonio Conforti, Fausto Minelli, and Giovanni A. Plizzari
Publication: Structural Journal
Appears on pages(s): 995-1006
Keywords: bar spacing-to-effective depth ratio; code predictions; shear cracking; shear failure; shear strength; width-to-effective depth ratio
Abstract:It is well-known that the shear strength of reinforced concrete elements without web reinforcement is affected by different factors. Among them, tensile strength of concrete, longitudinal reinforcement ratio, shear span-depth ratio, size effect, axial force, and maximum aggregate size seem to be the most important. Concerning other parameters—for example, the width-toeffective depth ratio (b/d)—there is still disagreement within the research community about its possible influence on shear bearing capacity. In this context, the present research evaluates the influence of both the b/d and bar spacing-to-effective depth ratio (s/d) on the shear strength by means of an experimental program on 17 full-scale specimens characterized by b/d ranging from 0.5 to 3.5 and an s/d from 0.24 to 0.71. Results showed that, for b/d > 1, an increase in the b/d determines a non-negligible increment in the shear strength, whereas the s/d (in the considered range) does not affect the shear bearing capacity.
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