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原文传递 Experimental investigation of full-scale post-tensioned composite AASHTO beams prestressed with carbon-fiber-reinforced polymer cables

题名：	Experimental investigation of full-scale post-tensioned composite AASHTO beams prestressed with carbon-fiber-reinforced polymer cables
正文语种：	eng
作者：	Mahmoud R. Manaa;Abdeldjelil Belarbi;Bora Gencturk;Mina Dawood
作者单位：	Jacobs in Houston Texas;University of Houston;Sonny Astani Department of Civil and Environmental Engineering at the University of Southern California Los Angeles California
关键词：	AASHTO beams; carbon-fiber-reinforced polymer; fatigue; flexure; post-tensioning; prestressed concrete
摘要：	This article reports on an investigation of the flexur-al behavior of post-tensioned composite AASHTO beams under flexural monotonic and fatigue loading. Five 39.5-ft-long (12-m) post-tensioned beams with 0.76-in. -diameter (19-mm) prestressing carbon-fiber-reinforced polymer (CFRP) cables were studied. Three beams were post-tensioned with unbonded cables, and the other two beams were post-tensioned with bonded cables. The fatigue resistance and the effect of tendon profile (straight versus draped) were investigated. The results showed that the two beams with unbonded tendons survived 2.3 million fatigue cycles with an insignificant effect on the deformation and stiffness of the beams. At the ultimate load, the beams with unbonded cables showed greater deformation compared with the counterparts with bonded cables; however, the flexural capacity of the unbonded beams was lower. Different analytical models for estimating the flexural capacity of the beams were assessed against the experimental results to determine the applicability of these models to full-scale CFRP post-tensioned beams.
出版年：	2024
期刊名称：	PCI Journal
卷：	69
期：	1
页码：	40-57