Numerical investigation of the beam-to-circular column connection using a new external stiffener

Document Type : Original Article

Authors

1 Ph.D. Student, Department of Civil Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran.

2 Associate Professor, Department of Civil Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

3 Assistant Professor ,Department of Civil Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran

Abstract

Continuity and doubler plates are used to strengthen the panel zone of rigid connections in steel structures. Unless columns are cut in every story of the building, it is not possible to connect these plates to rigid I-shaped beam-to-circular column connections. To overcome this problem, many researchers have employed external stiffeners. In 2019, a new detailing scheme was introduced for these connections using external stiffeners. Six full-scale experimental samples were built and tested under cyclic loading. Even though the efficiency of the new connection was established using laboratory tests, the study did not discuss the issues relating to the design process. In the present study, to formulate design criteria and relationships, numerical models have been constructed inside ABAQUS and verified using the experimental data. The results obtained from more than 60 finite element models have revealed that the proposed detailing scheme meets all of the code-specified criteria of rigid beam-column connections in special moment resisting frames. Further, based on the thickness of the channel profile and the stiffeners, the proposed detailing can be categorized as either rigid or semi-rigid. Finally, design criteria have been proposed and these connections can be considered as a suitable detailing for I-shape beam to tube column connections.

Keywords

Main Subjects

References

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History

  • Receive Date: 02 May 2022
  • Revise Date: 28 July 2022
  • Accept Date: 04 August 2022

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