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
Sheik Rashid Tower, 7th Floor
Dubai World Trade Center
Phone: +971 4 3097066
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: Development of the One-Way Shear Design Provisions of ACI 318-19 for Reinforced Concrete
Author(s): Daniel A. Kuchma, Sihang Wei, David H. Sanders, Abdeldjelil Belarbi, and Lawrence C. Novak
Publication: Structural Journal
Appears on pages(s): 285-295
Keywords: building code; database; design; experiments; shear
Abstract:Relationships in ACI 318-14 for calculating the concrete contribution to shear resistance (Vc) in reinforced concrete (RC) members (that is, non-prestressed) have been replaced in ACI 318-19 by one general relationship that considers the combined effects of member depth, percentage of longitudinal reinforcement, and the effect of axial stress on predicted shear strength capacity. This new relationship is Vc = (8λsλ[ρw]1/3√fc′ + Nu/[6Ag])bwd, where λs is a size effect factor equal to √(2/[1 + d/10]) that accounts for a reduction in shear stress capacity with increasing member depth. The frequently used expression in ACI 318-14, Vc = 2λ√fc′bwd, may continue to be used in members containing at least the minimum level of shear reinforcement. The one-way shear provisions for prestressed concrete (PC) members were not changed in this code cycle. The primary basis for the new RC provisions are test results compiled in databases developed and analyzed over the past two decades through a collaboration of Joint ACI-ASCE Committee 445, Shear and Torsion, and the German Committee for Structural Concrete (DAbStb). The process for developing these new provisions included an invitation to the ACI community to suggest new one-way shear design provisions. These suggestions were discussed within Joint ACI-ASCE Committee 445, and then evaluated and modified by ACI Subcommittee 318-E, Section and Member Strength, with consideration of their basis, accuracy, safety, ease-of-use, and range of application.
Click here to become an online Journal subscriber