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: Case Study of Effects of Post-Tensioning the Beams in a 45-Story Building
Author(s): Mark Fintel and S. K. Ghosh
Publication: Journal Proceedings
Appears on pages(s): 184-191
Keywords: beams (supports);bending moments;colums (supports);creep properties;high-rise buildings;post-tensioning;prestressed concrete;prestressing;shear properties.
Abstract:This paper is a case study of the effects of story-by-story post-tensioning on the various parts of a structure, during construction as well as service life. Mathematical models of a progressively growing multistory building are analyzed in stages corresponding to the separate stressing of each floor. A determination is made as to whether a significant portion of the applied prestressing force may be wasted in bending the ridgid walls or columns, thereby reducing the effective prestress in the beams. The possible effects of creep shortening of the beams due to post-tensioning are also studied. It is found that no special sliding details, which have sometimes been used, are nesscessary for the post-tensioned beams in the typical floor of a multi-story building.
Click here to become an online Journal subscriber