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Steel and Composite Structures Volume 50, Number 4, February 25 2024 , pages 419-428 DOI: https://doi.org/10.12989/scs.2024.50.4.419 |
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Flexural performance of composite beams with open-web π-shaped steel partially-encased by concrete |
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Liusheng Chu, Yunhui Chen, Jie Li, Yukun Yang, Danda Li and Xing Ma
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Abstract | ||
Prefabricated partially-encased composite (PEC) structural component is widely used in construction industry due to its superior structural performance and easy assembly characteristic. However, the solid web in traditional PEC components tends to split concrete into two halves, thus potentially reduces structural integrity and requires double concrete pouring. To overcome the above disadvantages, a new PEC beam with open-web π-shaped steel is proposed in this paper. Four open-web PEC beams with varying sectional height, flange thickness and web void rate were constructed and tested under flexural loads. During experimental tests, all beams exhibited typical flexural failure modes with strong moment capacities and excellent ductility. Owing to the unique construction form of web opening, steel-concrete bonding properties were enhanced and very small relative steel-concrete slips were observed. Experimental results also showed that the flexural capacity of such PEC beams increased with the increase of the sectional height and flange thickness, while was not affected by the web void rate. At last, a flexural capacity formula of the open-web PEC beam was proposed based on the whole section plastic rule. The formula results agreed well with experimental results. | ||
Key Words | ||
flange thickness; flexural capacity; open-web π-shaped steel; Partially-Encased Composite (PEC) beams; prediction formula; sectional height; web void rate | ||
Address | ||
Liusheng Chu and Yunhui Chen:School of Civil Engineering, Zhengzhou University, 450001, Zhengzhou, China Jie Li:Sanda University, 201209, Shanghai, China Yukun Yang:Shanghai Jieyi Architectural Consulting Firm, 202150, Shanghai, China Danda Li and Xing Ma:University of South Australia, SA 5095, Adelaide, Australia | ||