In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Become an ACI Member
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.
ACI World Headquarters
38800 Country Club Dr.
Farmington Hills, MI
ACI Middle East Regional Office
Second Floor, Office # 02.01/07
The Offices 02 Building, One Central
Dubai World Trade Center Complex
Phone: +971.4.516.3208 & 3209
Feedback via Email
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: Lapped Splices in Reinforced Concrete
Author(s): James Chinn, Phil M. Ferguson, and J. Neils Thompson
Publication: Journal Proceedings
Appears on pages(s): 201-213
Keywords: no keywords
Abstract:Tests on spliced reinforcement were performed under condit ions where longitudinal splitting was not prevented to study the effect of such splitting on bond capacity. Splices were selected as representative of tension lap splices that might occur in joining precast beams in negative moment regions. Failures were mostly of two kinds, horizontal splitting extending through the beams at the level of the bars and vertical longitudinal cracks through the bottom cover over the bars. Study included effect of the following: beam width, cover over steel, length of splice, space between splice bars, bar size, stirrups in splice zone, number of splices in a beam, splice position (top or bottom), and various cylinder strengths. It. was found that: increased beam width increased splice strength; increased cover increased splice strength in shorter splices; unit bond stress decreased with increasing splice length, but not as rapidly as surface area increased. splice position had little effect on strength; bar size had an effect on bond strength even when cover, splice length, and beam width were constant in tcsrms of bar diameters; stirrups increased splice strength; little difference in strength occurred between contact and spaced splices; and if bond stress is not limited to IT5 psi (as against allowable 350 psi) for SC = 4500 psi and #6 bottom bars, a safety factor of 2.5 will not always be obtained.
Click here to become an online Journal subscriber