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: Lateral Stability of a Prestressed Concrete Girder
Author(s): Walter Podolny, Jr. and John B. Scalzi
Publication: Journal Proceedings
Appears on pages(s): 317-326
Abstract:The object of this research was to apply theoretical lateral buckling relationships to a prestressed concrete girder determine the validity of the theory and the limitations of the assumptions. Based on theoretically established proportions, a test girder was constructed 43 ft 6 in. long, with an inverted T cross section. The girder was loaded uniformly along the bottom flange, leaving the top compression flange unsup-ported for its entire length. Lateral buckling was found to be of little or no consequence in this test where, in accordante with present code restrictions, at least three lateral braces would have been necessary. Several theories indicated that the ultimate capacity of the concrete would be approached or exceeded before lateral buckling would occur. The various theories predicting the elastic lateral buck- ling of the beam based on varying degrees of restraint of the bottom flange indicate that the roof deck does provide restraint to the tension flange. A complete evaluation is difficult to make when based on the behavior of only one beam test. However, the test indicates that it is conservative to assume the beam to behave as a flat plate unrestrained along the tension flange. As a further conclusion the test indicates that perhaps the current lateral buckling restrictions of the present codes should be re-examined to determine a more realistic requirement.
Click here to become an online Journal subscriber