New nodal connection of thin-walled cold formed profiles with a trapezoidal wall using separate welded bushings

Abstract

Abstract The article suggests a new constructive solution of the node made of thin-walled cold-formed profiles with a part of concave flat wall with the use of separate welded bushings for bolt arrangement. To assess the load-carrying capacity of the proposed node numerical and experimental study of a prototype model, consisting of thin-walled cold-formed profiles connected by a gusset plate with a bolt, using separate welded bushings was fulfilled. By results of researches character of pressure distribution in places of bolts installation is revealed and actual carrying capacity of new node is defined. The significance of the obtained research results for the construction industry lies in the fact that the new design solution of the node with the use of separate welded bushings makes it possible to eliminate the gap between the gusset plate and trapezoidal wall of the profile, thus performing the bolt fastening in this place and improving the actual work of the node. It should be noted that the proposed solution of connection with the use of separate welded bushings allows increasing the carrying capacity of the node, taking into account the installation of bolts in the concave part of the profile wall.