Tensile behaviour of headed anchored hollo-bolts in concrete filled hollow steel tube connections

Achieving a strong and stiff bolted connection with concrete filled steel tube (CFST) has been challenge to structural engineers, therefore enhance the performance, blind-bolts that are extended anchor in core have recently developed. Though some experimental tests investigate performance of were conducted, holistic understanding hollo-bolts remains be at scarce because certain limitations program. In this work, tensile pull-out behaviour hollo-bolt, extensively investigated for its CFST column connections. The study is conducted initially by validating numerical models existing works, later conducting extensive finite element parametric studies predict understand influence various components. It observed that, not only presence hollow led reduced deformation connection, but also bolt embedment length into significantly improved strength stiffness. observes significant change due parameter profiles. study, failure modes can altered as per combinations component elaborately discussed.