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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: Behavior of Multiple Lap Splices in
Author(s): M. A. Thompson, J. 0. Jirsa, J. E. Breen, and D. F.
Publication: Journal Proceedings
Appears on pages(s): 227-248
Keywords: anchorage (structural); beams (supports); bond (concrete to reinforcement); cover;deformed reinforcement; failure; lap connections; reinforced concrete; reinforcing steels; splicing;strength; stress transfer.
Abstract:The performance of lap splices in narrow beam sections (with two bars spliced) has been the subject of extensive investigation. Previous tests have indicated that the failure of spliced sections may initiate at an edge. Twenty-five tests were conducted to study reinforcing bar splice behavior in wide sections. All test specimens were subjected to a two-point loading to produce a constant moment along the splice. Bar sizes ranged from #6 to #14. Other variables included splice length, ratio of bottom cover to clear spacing between splices, transverse reinforcement, and casting position. While test results from wide sections containing multiple lap splices indicate that edge splices may be somewhat weaker than interior splices, a modification of the design equations for the strength of splices in wide sections does not appear to be needed.
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