Effect of bolt gauge distance on the behaviour of anchored blind bolted connection to concrete filled tubular structures

摘要

This study focuses on investigating the effect of bolt gauge distance on the column face bendingrnbehaviour for anchored blinded bolting connections to concrete filled tubular columns. Full scale experimentalrntests were conducted for six samples and ABAQUS 6.13 was employed to perform a parametric study to extendrnthe experimental data. Results show that, increasing the bolt gauge by 75% and 125% can improve the columnrnface bending strength by 26% and 58% respectively and the initial stiffness by 22% and 44% respectively. At thernultimate resistance of the component and for all the bolt gauges that were investigated in this study, completernyielding of the tubular corners was recorded. This finding contradicts with exciting knowledge which assumesrnthat the yield lines could extend only to the centreline of the SHS wall.