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论文类型：期刊论文

发表时间：2008-11-01

发表刊物：ENGINEERING STRUCTURES

收录刊物：SCIE、EI、Scopus

卷号：30

期号：11

页面范围：3239-3246

ISSN号：0141-0296

关键字：GFRP/steel wire composite rebar; Concrete; Pull-out test; Bond behavior; Design recommendations

摘要：Due to significant advantages over GFRP rebars, namely high tensile strength, high elastic modulus, and good ductile properties, GFRP/steel wire composite rebars offer a superior alternative to ordinary steel rebars. However, experimental researches oil this new type of rebar have been limited, especially those on the bond performance. This research is designed to investigate the bond behavior between GFRP/steel wire composite rebars and concrete. According to American Concrete Institute (ACI) code, a total of 180 Pull-out specimens were tested under monotonic static loading conditions. The test parameters were the rebar rib spacing, rebar diameter, embedded length, concrete compressive strength, concrete cover thickness, and concrete cast depth. Based oil the numerical analysis of the test results, new criteria for acceptable bond performance of GFRP/steel wire composite rebars to concrete were developed. Designed recommendations for the modification factor of concrete cover thickness, the modification factor of concrete cast depth, and the critical Value of bond slip at both free and loaded ends were derived. The calculation formula of bond strength and the basic development length were proposed, and the calculation principle of development length of concrete structures reinforced with GFRP/steel wire composite rebars was suggested. (C) 2008 Elsevier Ltd. All rights reserved.