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: Comparison of Measured and Calculated Stiffnesses For Beams Reinforced in Tension Only
Author(s): Bill G. Eppes
Publication: Journal Proceedings
Appears on pages(s): 313-326
Abstract:In any study of mechanics of indeterminate structures stiffness plays an important role in analysis. Analysis leads to the determination of the redundant quantities, which in turn lead to the determination of the critical bending moments and shears. The factor EI, which is a measure of stiffness, is necessary for determining deflec- tions of any elastic structure, be it statically determinate or statically indeterminate. This paper is a presentation of the findings of an experi- mental measurement of stiffness (EI) for reinforced concrete beams. Measured values of stiffness are compared with the calculated values for nine beams. It was found in this study that the measured values of stiffness decrease with increased bending moment, show- ing first a large value for stiffness for the lower values of moment and then a rather sudden transition to a lower value of stiffness for larger values of moment. The larger measured values compare reasonably well with the calcu- lated gross section of a reinforced concrete beam with transformed area of steel and the lower values compare fairly well with the calculated net section of the reinforced concrete beam with transformed area of steel included.
Click here to become an online Journal subscriber