EVALUATION OF PRESTRESS LOSSES DUE TO CONCRETE CREEP AND SHRINKAGE IN CFRP PRE-TENSIONED CONCRETE MEMBERS

摘要：

　　This paper presents the results of an experimental study regarding the evaluation of prestress losses in carbon fiber reinforced polymers(CFRP)pre-tensioned concrete prisms.Total of fifty-four CFRP pretensioned prisms were cast and instrumented along their length to obtain the concrete longitudinal strain profiles and corresponding prestress losses due to concrete creep and shrinkage over a one year period.Additionally,long-term stress relaxation tests(over one year)were conducted on thirty plain prestressing CFRP strands to monitor their corresponding stress relaxation characteristics.The experimental results are presented and compared with the existing prestress losses prediction method from American Association of State Highway and Transportation Officials(AASHTO).The paper also presents revised design guidelines to be implemented in the new AASHTO cycle.

关键词： Prestressed concrete prestress losses AASHTO CFRP design guidelines

作者: A.Belarbi H.Tahsiri M.Dawood B.Gencturk

作者单位: Department of Civil and Environmental Engineering,University of Houston,Houston,TX Sonny Astani Department of Civil and Environmental Engineering,University of Southern California,Los

会议类型: 国际会议

会议名称: the Sixth Asia-Pacific Conference on FRP in Structures (APFIS2017)(第六届亚太纤维增强复合材料结构工程国际会议暨第十届全国建设工程FRP应用学术交流会)

会议地点: 新加坡

会议语种:英文

页码: 1-5

在线出版日期: 2017-07-19（万方平台首次上网日期，不代表论文的发表时间）