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论文类型：期刊论文

发表时间：2017-09-30

发表刊物：CONSTRUCTION AND BUILDING MATERIALS

收录刊物：SCIE、EI、Scopus

卷号：150

页面范围：501-510

ISSN号：0950-0618

关键字：CFRP; Expansive concrete; Prestress; Flexural behavior; Crack width; Ductility

摘要：To make full use of carbon fiber-reinforced polymer (CFRP) sheets and the advantages of prestressed structures, an expansive concrete beam reinforced with hybrid CFRP enclosure and steel is proposed in this study. Five expansive concrete (EC) beams and five conventional Portland cement concrete (PC) beams were tested under flexure. Reinforcement was designed by considering different layers of CFRP as well as steel reinforcement. Cracking loads, ultimate loads, mid-span deflections, and ductility were collected and analyzed. Test results show that beams reinforced with hybrid reinforcement perform superior than those reinforced only with steel in all aspects. The expansive concrete beams reinforced with hybrid reinforcement perform best among all in both mechanical properties and ductility. In addition, new equations were put forward for calculating the crack width of the beams reinforced with hybrid reinforcement and crack width-load relations are in good agreement with theoretical calculations. (c) 2017 Elsevier Ltd. All rights reserved.