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
Chat with Us Online Now
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: Numerical Analysis of the Effect of Shrinkage on Flexural Deformation and Crack Width
Author(s): I. Ujike, R. Sato, I. Maruyama, M. Tanimura, and M. Suzuki
Publication: Special Publication
Appears on pages(s): 201-216
Keywords: deformation; fictitious crack model; flexural crack width; numerical analysis; reinforced concrete beam; shrinkage; tension softening
Abstract:The effect of shrinkage on short-term and long-term flexural deformation and crack width of structural concrete members is investigated numerically and experimentally. The numerical analysis was performed by solving simultaneous differential equations relating to bond slip based on bond stress-slip relationship. The equations were formulated for an element between adjacent two cracks, taking shrinkage, creep, time dependent of bond and tension softening based on fictitious crack model into consideration.
To verify the present method, load tests were carried out on structural concrete members with 200mm wide x 250mm high section made of conventional high shrinkage concrete and expansive high strength concrete, in which curvature and crack width were measured in a constant bending moment zone with 800mm length. In addition to this, creep and shrinkage tests were also performed.
The following conclusions are drawn from the present study;
(1) Tension in concrete at a cracked section contributes dominantly to decreasing the stress in a tension reinforcing bar resulting in enhancing the flexural stiffness and in decreasing the flexural crack width, when the stress in the tension reinforcing bar is below 150 N/mm2 and the tension reinforcing bar ratio is below 1.5%.
(2) Flexural crack widths increase with time after the application of sustained loading mainly due to loss of tension stiffening at cracked section, which is caused by shrinkage.
(3) The above conclusions are explained by the present method.
Click here to become an online Journal subscriber