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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: Investigation of Grouted Dowel Connections for Precast Wall Construction
Author(s): Douglas J. Provost-Smith, Mohamed Elsayed, and Moncef L. Nehdi
Publication: Structural Journal
Appears on pages(s): 41-50
Keywords: bond strength; connection; development length; duct; precast concrete
Abstract:The grouted dowel connection has been simple, cost-effective, and widely used in precast concrete structural systems. The grouted bar length in this connection is currently designed similarly to a regular steel bar in reinforced concrete. This underestimates the connection’s bond strength, thus resulting in excessive connection length. The effect of the duct’s presence in this connection is examined in the present study and was found to be crucial in generating a considerable confinement effect and relatively larger bond stress than accounted for in current design codes. Full-scale pullout tests were performed, and their results were compared with relevant data in the open literature to develop a more accurate design equation for predicting the required dowel development length. The equation was found to produce results three times smaller than that determined by the ACI 318-14 code while being desirably 10% more conservative than equations proposed in previous research.
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