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.
American Concrete Institute
38800 Country Club Dr.
Farmington Hills, MI
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: A New Formula to Calculate Crack Spacing for Concrete Plates
Author(s): E. Rizk and H. Marzouk
Publication: Structural Journal
Appears on pages(s): 43-52
Keywords: bond stress; crack spacing; plate; transverse reinforcement.
Abstract:Different codes have different formulas to calculate crack spacing and crack width developed in flexural members. Most of these formulas are based on the analysis of results of tested beams or one-way slabs. Crack control equations for beams underestimate the crack width developed in plates and two-way slabs. It seems that little attention has been paid in determining the crack spacing and width in reinforced concrete plates. The behavior of reinforced concrete plates and two-way slabs is different from beams or oneway slabs; therefore, the methods developed for beams cannot be directly applied to plates and two-way slabs. In this paper, a new analytical equation is proposed for calculating the crack spacing for plates and two-way slabs. A special focus will be given to thick concrete plates used for offshore and nuclear containment structures. The proposed equation takes into account the effect of steel reinforcement in the transverse direction through the splitting bond stress. The new equation provides good estimates for crack spacing in plates and two-way slabs with different concrete covers. Eight full-scale two-way slabs were designed and tested to examine the effects of concrete cover and bar spacing of normal- and highstrength concrete on crack spacing. The different code expressions are evaluated with respect to the experimental results.
Click here to become an online Journal subscriber