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Numerical studies on axially loaded doubler plate reinforced elliptical hollow section T-joints

  • Sari, Busra (Department of Civil Engineering, Gumushane University) ;
  • Ozyurt, Emre (Department of Civil Engineering, Gumushane University)
  • Received : 2021.06.21
  • Accepted : 2022.04.06
  • Published : 2022.04.10
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Abstract

This paper presents results of numerical studies completed on unreinforced and doubler plate reinforced Elliptical Hollow Section (EHS) T-joints subjected to axial compressive loading on the brace member. Non-linear finite element (FE) models were developed using the finite element code, ABAQUS. Available test data in literature was used to validate the FE models. Subsequently, a parametric study was carried out to investigate the effects of various geometrical parameters of main members and reinforcement plates on the ultimate capacity of reinforced EHS T-joints. The parametric study found that the reinforcing plate significantly increases the ultimate capacity of EHS T-joints up to twice the capacity of the corresponding unreinforced joint. The thickness and length of the reinforcing plate have a positive effect on the ultimate capacity of Type 1 joints. This study, however, found that the capacity of Type 1 orientation is not dependent on the brace-to-chord diameter ratio. As for type 2 orientations, the thickness and length of the reinforcement have a minimal effect on the ultimate capacity. A new design method is introduced to predict the capacity of the reinforced EHS T-joints Type 1 and 2 based on the multiple linear regression analyses.

Keywords

Acknowledgement

The authors gratefully acknowledge the valuable comments and suggestions of reviewers on the draft version of this paper.

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