Behavior of ring flange – Bolts joint under complex bearing forces

Abstract

With many advantages, nowadays, the structure using tubular steel structure is more and more widely used in all kinds of construction. In response to the rapid development of the tubular steel structure, it has been had a lot of research about the ring flange – bolts joints of this structure. Welding joints and ring flange – bolts joint are used most popular in tubular structure. However the joints using flanges and bolts are only mentioned in the case of simple load bearing such as tension or compression or bending without computational instructions in the case of complex bearing forces (concurrent shear force and bending or concurrent tension/compression and bending or tension/compression and twisting). The study outlines the behavioral rules for joints of tubular structure using ring flange – bolts joint in the case of concurrent shear force and bending, thereby proposing the rational parameters of the joint (the relationship between the thickness of the flange, the diameter of the bolt and thickness of steel tubes).