Simplified component model for curved T-stub connection to concrete-filled steel tube with blind bolts and extensions

This paper describes a simplified component model developed to predict the behaviour of a blind-bolted T-stub connection to a concrete-filled steel tube with or without anchorage extensions within the tube. The components of the connection are considered as springs with certain mechanical properties, such as stiffness and strength. They are assumed to follow a bilinear, trilinear, or non-linear force-displacement relationship. The behaviour of the connection can be predicted by assembling the stiffness of the various components. Comparison of the analytical result with existing experimental data shows good correlation. The proposed model can be easily modified to describe the response of the overall beam-to-column connection coupled with other types of assemblies. The proposed method will efficiently serve practicing engineers in designing appropriate frame connections with blind bolts in regions of low to medium seismicity.