Techno Press

Steel and Composite Structures   Volume 28, Number 4, August25 2018, pages 471-482
Experimental investigation on the seismic behavior of reinforced concrete column-steel beam subassemblies
Liquan Xiong, Jinjie Men, Ruyue Ren and Mengke Lei

Abstract     [Full Text]
    The composite reinforced concrete and steel (RCS) structural systems have larger structural lateral stiffness, higher inherent structural damping, and faster construction speed than either traditional reinforcement concrete or steel structures. In this paper, four RCS subassemblies with or without the RC slab designed following a strong column-weak beam philosophy were constructed and tested under reversed-cyclic loading. Parameters including the width of slab and composite effect of the RC slab and beam were explored. The test results showed that all specimens performed in a ductile manner with plastic hinges formed in the beam ends near the column faces. The seismic responses of composite connections are influenced significantly by different width of slabs. Compared with that of the steel beam without the RC slab, it was found that the load carrying capacity of composite connections with the RC slab increased by 30% on average, and strength degradation, energy dissipation also had better performance, while the ductility of that were almost the same. Furthermore, the contribution of connection deformation to the overall specimen displacement was analyzed and compared. It decreased approximately 10% due to the coupling effect in the columns and beams with the RC slab. Based on the test result, some suggestions are presented for the design of composite RCS joints.
Key Words
    reinforced concrete column and steel beam; composite connections; slab; quasi-static test; seismic behavior; capacity; deformation
(1) Liquan Xiong, Jinjie Men, Ruyue Ren, Mengke Lei:
College of Civil Engineering, Xi'an University of Architecture & Technology, 13 Yanta Road, Xi'an, Shaanxi Province, 710055, China;
(2) Liquan Xiong:
Department of Civil Engineering, Chongqing Three Gorges University, 666 Tianxing Road, Wanzhou, Chongqing Municipality, 404120, China.

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