EXPERIMENTAL INVESTIGATION ON BEAMS PRE-TENSIONED AND POST-TENSIONED WITH PRESTRESSING CFRP
The need to find the solution for corrosion problems in steel structures has lead the engineering community to look for innovative materials such as CFRP(Carbon fiber reinforced polymer).The use of such a material requires a full understanding of their short-term and long-term behavior.Moreover,a standard guideline for CFRP in any community encourages and facilitates the use of the innovative material with confidence.In the US,there is a lack of comprehensive design guidelines for use by bridge engineers,especially in the American Association of State Highway Transportation Officials(AASHTO)Load and Resistance Factor Design(LRFD)format.A project is currently underway which focuses on studying the flexural behavior of bridge girders prestressed and post-tensioned with CFRP cables and bars.This paper discusses the application of CFRP cables and bars as primary prestressing reinforcement.In addition,the preliminary analytical and experimental results are presented for four full-scale AASHTO Type-I beams.Two different types of prestressing CFRP,namely bars and cables,have been used in this study.One beam was post-tensioned and two beams were pre-tensioned with Carbon Fiber Composite Cable(CFCC)cables and bars.The fourth beam was pre-tensioned with steel tendons for comparison purposes.All beams were tested under monotonic loading up to failure.The paper will present the results of this experimental investigation along with analytical prediction using ACI(for CFRP prestressed beams)and AASHTO(for steel prestressed).
Prestressed concrete post-tensioned pre-tensioned concrete structures AASHTO CFRP design guidelines flexural design
A.Belarbi P.Poudel M.Reda M.Dawood B.Gencturk
Department of Civil and Environmental Engineering,University of Houston,Houston,TX Sonny Astani Department of Civil and Environmental Engineering,University of Southern California,Los
国际会议
新加坡
英文
1-5
2017-07-19（万方平台首次上网日期，不代表论文的发表时间）