Design and numerical analysis of reusable column base connection with pinned energy dissipators

This paper represents a comprehensive numerical analysis of a reusable column base connection previously proposed by the authors. The energy dissipator utilised in the proposed connection was investigated from the aspect of the design procedure, experimental study, and numerical simulation. The test specimens were designed following the design procedure and served as a reference for comparison with the finite element (FE) models in ABAQUS. The findings indicate that the energy dissipator behaves in accordance with expectations, affirming the feasibility of the modelling approach. To investigate the impact of key design parameters on the global and local behaviours of the proposed connection, an advanced FE model was developed and sufficiently validated against the experimental data from prior research by the authors. Three sets of FE models were constructed corresponding to three design parameters, including the global slenderness of the reduced section, the strength factor, as well as the deflection angle of the dissipative plate. The parametric study focuses on the energy dissipation capacity and reusability. The outcomes contribute to a deeper comprehension of the assumptions and constraints of the design process, offering practical suggestions to enhance the seismic performance of the proposed connection.