ENSURING THE OVERALL STABILITY OF STEEL BEAMS BY TORSIONAL BRACINGS

Abstract

The current domestic building codes for the design of steel structures do not provide guidance on ensuring the overall stability of beams using torsional bracings. At the same time, the structures of steel frames of buildings and bridges contain elements that could take on this role. The lack of standard methods for designing torsional bracings narrows the choice of design solutions available to the designer to ensure the stability of bending elements, forcing the introduction of additional elements into the steel frame, the role of which is often conditional. The article reviews domestic and foreign literature on the theory of stability calculations for beams braced with torsional braces. The provisions for designing beams with braces for stability, set out in current foreign standards, are considered. Research conducted in past years and currently both in our country and abroad is considered. A selection of factors that have the greatest impact on the effectiveness of using torsional braces to ensure the stability of beams is presented, and areas for further development of approaches to the design of such connections are identified. Recommendations summarizing the results of the reviewed studies are provided