Conceptual numerical investigation of all-steel Tube-in-Tube buckling restrained braces

On the basis of the finite element analyses results, it has been demonstrated that the proposed TiTBRB - if well designed - would be quite competent in accomplishing the intended tasks as a buckling restrained bracing member. Properly designed TiTBRBs can exhibit stable cyclic behaviour and satisfactory cumulative plastic ductility capacity, so that they can serve as effective hysteretic dampers. At the same time, in such all-steel TiTBRBs concreting has been eliminated and hence much lighter members are obtained. This is also associated with ease and speed of fabrication, erection, inspection, replacement and hence a more economical and environmentally friendly design.