SDSS 2025

Elastic Behaviour of Varying-Width T-Stubs in Contact with a Rigid Foundation

  • Por, Somethea (INSA Rennes)
  • Sonna Donko, Maël (Framatome)
  • Couchaux, Maël (INSA Rennes)
  • Boudot, Jean-Pierre (Framatome)

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Extensive research has been conducted on the tensile behaviour of T-stubs with uniform width, commonly used to model the tensile areas of bolted end-plate connections. However, bolts can be positioned on the end-plate corner particularly in column base plates. The previous classical T-stub model does not apply directly, and a varying-width end-plate should be considered. Accu-rate modelling of such configurations is essential to determine their stiffness and incorporate it into the evaluation of the rotational stiffness of the connec-tion. To bridge this gap, the present study develops a refined mechanical model based on enhanced beam theory in contact with a rigid foundation. This model is applied to simulate the elastic response of varying-width T-stubs, enabling the evaluation of anchor bolt forces, position of the prying force and the stub’s tensile stiffness. The proposed model is confronted to results of a finite element model developed using ANSYS APDL with solid and contact elements. The analytical and numerical results are in good agreement. To support practical application, a simplified formulation is also proposed. The developed model offers a reliable tool for understanding and designing corner-bolted steel-to-concrete end-plate connections, especially in the elastic domain.