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原文传递 Posttensioning of segmental bridges using carbon-fiber-composite cables

题名：	Posttensioning of segmental bridges using carbon-fiber-composite cables
其他题名：	1.Dolan,C.W.,C.E.Bakis,and A.Nanni.2001."Design Recommendations for Concrete Structures Prestressed with FRP Tendons."Report DTFH61-96-C-00019.Washington,DC:Federal Highway Association.
正文语种：	英文
作者：	Xiong Yang
关键词：	Bridge;carbon-fiber-composite cable;carbon-fiber-reinforced polymers;CFCC;CFRP;posttensioning;segmental.
摘要：	Carbon-fiber-composite cables (CFCC) offer a corrosion-free alternative to steel strands. This paper describes the construction and testing of a 31/2:1 scale model of the Long Key segmental box girder bridge model posttensioned with CFCC or steel strands at different prestress and for different loading configurations. The study shows the feasibility of CFCC for segmental bridges. The main concern, however, is that end anchorages are factory-made together with the strands, and therefore, strands must be ordered at predetermined lengths, considering the elongation of stressed tendons. The model behaved bilinearly with both types of strands. Whereas initial stiffness was about the same for both types of strands, CFCC tendons led to a much softer response after decompression and joint opening. Given the higher flexibility of the segmental bridge model posttensioned with CFCC, a stiffness-based equivalency approach may provide a more comparable performance with the same bridge model posttensioned with steel. Such an approach, however, may lower the stress in CFCC commensurate with its lower elastic modulus.
出版年：	2015
论文唯一标识：	J-30Y2015V60N03041
英文栏目名称：	Bridges
期刊名称：	PCI-Prestressed Concrete Institute Journal
拼音刊名(出版物代码)：	J-30
卷：	60
期：	03
页码：	50-62