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Bending Capacity and Elastic Stiffness for a Novel Configuration of Cold-Formed U-Shaped Steel-and-Concrete Composite Beams
| 题名： | Bending Capacity and Elastic Stiffness for a Novel Configuration of Cold-Formed U-Shaped Steel-and-Concrete Composite Beams |
| 正文语种： | 英文 |
| 作者： | Jiepeng Liu, M.ASCE1; Yi Zhao2; Yuanlong Yang3; Yohchia Frank Chen, M.ASCE4 |
| 作者单位： | 1Professor of Composite Structure, Key Laboratory of New Technology for Construction of Cities in Mountain Area (Ministry of Education) and School of Civil Engineering, Chongqing Univ., Chongqing 400045, China. 2Ph.D. Student, Key Laboratory of New Technology for Construction of Cities in Mountain Area (Ministry of Education) and School of Civil Engineering, Chongqing Univ., Chongqing 400045, China. 3Lecturer of Composite Structure, Key Laboratory of New Technology for Construction of Cities in Mountain Area (Ministry of Education) and School of Civil Engineering, Chongqing Univ., Chongqing 400045, China (corresponding author). ORCID: https://orcid.org/0000-0001-7924-3192. 4Professor of Composite Structure, Key Laboratory of New Technology for Construction of Cities in Mountain Area (Ministry of Education) and School of Civil Engineering, Chongqing Univ., Chongqing 400045, China. |
| 关键词： | Bending capacity; Elastic stiffness; U-shaped steel; Composite beam; Shear connection |
| 摘要： | This paper discusses a novel cold-formed U-shaped steel and concrete composite beam (RCUCB) for which a reinforcement truss is furnished to stiffen the open steel U-section. Inverted U-shaped reinforcements are assembled to enhance the interface between a concrete flange and a beam web, which includes the bottom reinforcement, concrete fill, and steel U-section. A longitudinal bottom reinforcement is installed to control the slip between the concrete web and the steel U-section. Ten specimens were tested under bending moment, and all exhibit a typical flexural failure. Significant integrity for the RCUCB can be achieved through the enhancement of the reinforcement truss and inverted U-shaped reinforcement. A modified method for determining the shear connection degree of the RCUCB is proposed, which considers the ontributions from the inverted U-shaped reinforcement, neck concrete, and reinforcement truss. Two transformed section methods were adopted to determine the elastic stiffness. In addition, a simplified bending capacity calculation method is presented. |
| 出版年： | 2019 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | 145 |
| 期： | 10 |
| 页码： | 1-12 |
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