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Steel and Composite Structures
  Volume 45, Number 3, November10 2022 , pages 425-436
DOI: https://doi.org/10.12989/scs.2022.45.3.425
 


Mechanical behavior of prefabricated steel-concrete composite beams considering the clustering degree of studs
Yanmei Gao, Liang Fan, Weipeng Yang, Lu Shi, Dan Zhou and Ming Wang

 
Abstract
    The mechanical behaviors of the prefabricated steel-concrete composite beams are usually affected by the strength and the number of shear studs. Furthermore, the discrete degree of the arrangement for shear stud clusters, being defined as the clustering degree of shear stud λ in this paper, is an important factor for the mechanical properties of composite beams, even if the shear connection degree is unchanged. This paper uses an experimental and calculation method to investigate the influence of λ on the mechanical behavior of the composite beam. Five specimens (with different λ but having the same shear connection degree) of prefabricated composite beams are designed to study the ultimate supporting capacity, deformation, slip and shearing stiffness of composite beams. Experimental results are compared with the conventional slip calculation method (based on the influence of λ) of prefabricated composite beams. The results showed that the stiffness in the elastoplastic stage is reduced when λ is greater than 0.333, while the supporting capacity of beams has little affected by the change in λ. The slip distribution along the beam length tends to be zig-zagged due to the clustering of studs, and the slip difference increases with the increase of λ.
 
Key Words
    beam test; degree of shear studs clustering; prefabricated steel-concrete composite beam; shear studs cluster; slip calculation method
 
Address
Yanmei Gao and Liang Fan:1)Department of Bridge Engineering, School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
2)State Key Laboratory of Mountain Bridge and Tunnel Engineering

Weipeng Yang:Mianzhu Municipal Bureau of Communication, Deyang, 618200, China

Lu Shi:Xiangyang Municipal Engineering Design Institute Co. LTD, Xiangyang, 441000, China

Dan Zhou:Zhejiang Highway Technicians College, Hangzhou 310023, China

Ming Wang:Department of Bridge Engineering, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
 

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