Numerical Investigation on the Behaviour of Blind-Bolted Steel Beam to CFST Column Connections

Due to several benefits provided by the combined contribution of steel and concrete the usage of steel–concrete composite structures has been extensively accepted in the building industry for decades. In order to transfer loads from one member to another, connections are an essential component of a structure. The failure criteria of the bolted beam to column connections vary due to the strength and mechanical properties of individual components. In the present study, the cyclic load carrying capacity of steel beam to bolted concrete filled steel tube connection is evaluated using finite element software ANSYS. The failure modes, strength and overall behaviour of the specimens have been studied. Blind bolted concrete filled steel tube was numerically validated and a comprehensive parametric study was conducted to determine the effect of the following parameters. The infill concrete, tube wall thickness of the steel tube connections and thickness of plate used in the beam column connection are selected as parameters for the current study. The effect of these parameters on the seismic behaviour and corresponding changes in failure mode is detailed in this study. The blind bolted CFST connections has improved strength, stiffness, moment capacities and lateral resistance and thus it has broad applications and future scopes in various fields.