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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: A Reevaulation of Test Data on Development Length and Splices
Author(s): C. O. Orangun, J. O. Jirsa, and J. E. Breen
Publication: Journal Proceedings
Appears on pages(s): 114-122
Keywords: anchorage (structural); beams (supports); bond (concrete to reinforcement); cover;deformed reinforcement; failure: lap connections; regression analysis; reinforced concrete;reinforcing steels; splicing;stress transfer;structural engineering.
Abstract:An equation is developed for calculating development and splice lengths for deformed bars. The equation is based on a nonlinear regression analysis of test results of beams with lap splices and reflects the effect of length, cover, spacing, bar diameter, concrete strength, and transverse reinforcement on the strength of anchored bars. Design recommendations are proposed and compared with current provisions for development splice length. The comparison shows that for the minimum cover and spacing (no transverse reinforcement) the proposed provisions require increases in anchorage lengths of IO to 25 percent over current provisions. If cover is increased or transverse reinforcement is added, the splice length for large bars may be reduced by as much as 60 percent over that required by present provisions.
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