Some approaches to the technology of connecting reinforcing bars

Introduction . The process of connecting reinforcing bars (rebars) is of high importance, as it affects the quality of the manufactured structures. This paper discusses a method for welded splicing of rebars using sleeve couplings, designed as one of the alternatives to welded and mechanical connections of reinforcing bars permitted by regulatory documents. Aim . To examine an alternative method for connecting rebars, which can be used for small-scale projects and remote construction sites, including cases where delivery of equipment for thread cutting or press-fitting connections is difficult and economically unjustified, as well as in seismically hazardous areas. Materials and methods. Normative documents regulating the connection of reinforcing bars are reviewed, including requirements for connecting reinforcing bars in seismically hazardous areas. Schemes for welded splices of reinforcing bars using sleeve couplings are presented. Results . Schemes for connecting reinforcing bars of different diameters with various welded splices are proposed. A calculation example is provided to confirm the feasibility of the proposed approach. Conclusions . The method provided in this paper is a suitable solution for welding reinforcing bars, which can be applied in construction projects in seismically hazardous areas.