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: Long-Term Behavior of Concrete Beams Prestressed with Carbon Fiber Tendons
Author(s): A. Braimah, M. F. Green, K. A. Soudki, and F. Clapp
Publication: Special Publication
Appears on pages(s): 547-558
Keywords: carbon fiber reinforced polymers; creep; long-term behavior; prestressed concrete; relaxation; shrinkage; sustained loading
Abstract:Much research has been conducted on the short-term behavior of concrete members prestressed with FRP tendons, but relatively little is known about the long-term behavior of these members. This lack of knowledge is one important factor hindering the widespread use of FRP for prestressing. Therefore, a comprehensive study on the long-term response of FRP prestressed concrete members is necessary before FRP can gain acceptance as a viable construction material. This paper describes a part of an on-going test program to investigate the long-term behavior of CFRP prestressed concrete beams. The scope of the program includes eight large-scale T-beams constructed with different levels of prestress. The study considers fully prestressed and partially prestressed sections. For the long-term tests, the specimens are subjected to a sustained loading, higher than the cracking load of the partially prestressed members, maintained constant for several months (about 10,000 hours). The results of the long-term test show similar behavior between beams prestressed with CFRP tendons and that prestressed with steel strands. The ratio of long-term to instantaneous deflection was higher for beams prestressed with CFRP tendons than for the beam prestressed with steel strands. The overall deflection of the CFRP tendons was however smaller than that of the steel prestressed beams.
Click here to become an online Journal subscriber