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首页> 外文期刊>Journal of Composites for Construction >Behavior of Wide Shallow RC Beams Strengthened with CFRP Reinforcement
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Behavior of Wide Shallow RC Beams Strengthened with CFRP Reinforcement

机译:CFRP加固的宽浅RC梁的性能

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摘要

One-way reinforced concrete joist floors with wide shallow beams (WSBs) are used widely in building construction throughout the Middle East. The short- and long-term behavior of WSBs externally strengthened with carbon fiber-reinforced polymer (CFRP) reinforcement was studied on isolated beams and as part of full-scale building. This paper presents the results of the experimental investigation on the flexural performance of isolated WSBs externally strengthened with CFRP reinforcement. A total of six full-scale beams were constructed and tested to failure. The test variables were the amount, type, configuration, and the elastic modulus of CFRP reinforcement. The test results were presented in terms of deflections, ultimate capacities and modes of failure, crack width development, and strains in reinforcement and concrete. The test results showed significant improvement in the flexural performance of the strengthened beams with respect to flexural capacity, flexural stiffness, and crack width. All but one of the strengthened beams failed because of the debonding of CFRP reinforcement; however, the load carrying capacity of WSBs were more than that predicted by relevant design guidelines.
机译:具有宽浅梁(WSB)的单向钢筋混凝土托梁地板在整个中东地区的建筑中得到广泛使用。研究了碳纤维增强聚合物(CFRP)外部加固的WSB的短期和长期行为。本文介绍了用CFRP加固外部隔离的WSB的抗弯性能的实验研究结果。总共构造了六个全尺寸梁并进行了测试,直至失效。测试变量是CFRP增强材料的数量,类型,构型和弹性模量。测试结果以挠度,极限承载力和破坏模式,裂缝宽度发展以及钢筋和混凝土的应变表示。测试结果表明,在抗弯能力,抗弯刚度和裂缝宽度方面,加固梁的抗弯性能有了显着改善。由于一根CFRP钢筋的脱粘,除一根钢筋外,所有钢筋都失效了。但是,WSB的承载能力超过了相关设计指南的预期。

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