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Steel and Composite Structures
  Volume 51, Number 1, April 10 2024 , pages 9-24
DOI: https://doi.org/10.12989/scs.2024.51.1.009
 


Shear mechanical behavior of prefabricated and assembled multi-key group stud connectors
Liang Fan, Wen Zeng, Wenhao Zhao and Mengting Wang

 
Abstract
    In order to study the shear mechanical behavior of prefabricated and assembled multi-key group stud connectors, this paper conducted push-out tests on 10 prefabricated and assembled multi-key group stud connectors, distributed in 5 groups, and detailed the failure modes of each specimen. Based on the finite element software, a total of 22 models of this type of stud connector are established, and validated the finite element models using the push-out tests. Furthermore, the effects of stud diameter, number of key groups, and spacing of key groups on the shear resistance of prefabricated and assembled multi-key group stud connectors are analyzed. Combined with the test and finite element, the force analysis is carried out for the stud and first-pouring and post-pouring concrete. The results show that the spacing and number of key groups have a significant impact on the shear capacity and shear stiffness of the specimen. For a single stud, the shear force is transferred to the surrounding concrete via the stud's root. When the stud is finally cut, the steel and the concrete plate are separated. Under vertical shear force, the top row of studs experiences the highest shear, while the middle row has the least. Based on statistical regression, a formula of assembled multi-key group stud connectors is proposed.
 
Key Words
    complex networks; mathematical simulation; mechanical behavior; nanotechnology
 
Address
Liang Fan:1)School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China 2)State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing 400074, China

Wen Zeng, Wenhao Zhao and Mengting Wang:School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
 

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